Set the chart's placeholder version to 0.24.0

Cosmetic: make helm-package sets the published version and appVersion from the tag, so these two fields decide nothing (see the comment above them). Kept in step anyway, same as 3ee8583 and d2cdcc9, so a tree heading for v0.24.0 doesn't say 0.23.0.
List dead man's switches with their status on Team -> Switches
2026-09-25 23:40:55 +02:00 · 2026-09-25 23:40:55 +02:00 · 2026-09-25 19:12:33 +02:00 · 2026-09-25 19:12:33 +02:00 · 2026-09-25 17:25:17 +02:00 · 2026-09-25 17:25:17 +02:00
39 changed files with 4918 additions and 543 deletions
@@ -47,12 +47,13 @@ curl -H "Authorization: Bearer $KEY" http://localhost:8080/api/users

 The server serves a web UI at `/`: the incident queue, each incident's alerts
 and timeline with every action (acknowledge, assign, snooze, note, resolve,
-archive), who is on call, the alert feed, and changing your own password. It is
-built for a phone first. On a phone it has a bottom tab bar and a sticky action
-bar, it follows the system's dark mode, and it can be added to the home screen.
-From 900px wide it switches to a sidebar with the queue and the incident side by
-side. Schedule editing, statistics and user management remain in
-[terdut-tui](https://github.com/yeniklas/terdut-tui) for now.
+archive), who is on call, the alert feed, and an *Account* tab for your own
+password and the ntfy topic your pages go to. It is built for a phone first. On a phone
+it navigates through a hamburger menu and has a sticky action bar, it follows the
+system's dark mode, and it can be added to the home screen. From 900px wide it switches
+to a sidebar with the queue and the incident side by side. The Stats page shows
+incident counts, MTTA and MTTR, and alert frequency by name, hour and day over a
+chosen range.

 You sign in with a username and password. Users have no password until one is
 set, and a user without one can only use API keys:
@@ -85,15 +86,51 @@ How a browser stays signed in:
 With `TERDUT_PUBLIC_URL` set, tapping a push notification opens the incident in
 the web UI (`/incidents/{id}`).

-A **Team** tab holds everything a team owns: the on-call rota, the escalation
-ladder, the alert sources with their keys, the dead man's switches and the
-membership. An owner edits it; a member sees the same page read-only, because
-the server refuses their writes anyway. Somebody in more than one team picks
-between them at the top.
+A **Team** tab holds everything a team owns, in five sub-sections with a URL
+each and a strip across the top to move between them: the on-call rota
+(`/team/rota`), the membership (`/team/members`), the escalation ladder
+(`/team/escalation`), the alert sources with their keys (`/team/sources`) and
+the dead man's switches (`/team/deadman`). `/team` itself is an overview — who
+is on call today, how many members and owners, how many ladder levels, how many
+keys and how many switches — so a page fetches only what it shows. An owner
+edits it; a member sees the same pages read-only, because the server refuses
+their writes anyway. Somebody in more than one team picks between them above
+the strip, since the choice changes the subject of all five.
+
+The rota is a month at a time, one coloured initial per day with a legend
+underneath, and it says how many days are left uncovered — the question a rota
+is read for is who holds which stretch, and a run of one colour answers it
+where a list of dates does not. An owner taps a day to hand it to somebody or
+empty it, and fills a whole shift from the range form folded in below.

 The **Admin** tab appears only for a system administrator, and holds what
-belongs to the whole server rather than to one team: every team, every user, and
-the settings that used to be environment variables.
+belongs to the whole server rather than to one team. It has three sub-sections,
+each with a URL of its own and a strip across the top to move between them:
+every team (`/admin/teams`), every user (`/admin/users`), and the settings that
+used to be environment variables (`/admin/settings`). `/admin` itself is an
+overview — how many of each, and what each section is for. Adding somebody is
+minting them an invite link into a team, rather than creating a bare account:
+the person who accepts it picks their own password, so one never passes through
+an administrator, and the link carries the team, so they land somewhere with a
+queue in it. That happens on the team's own page, since an invite is a fact
+about a team; the user list points there rather than asking which team beside a
+form.
+
+A name in the team list opens **that team's page**, at `/admin/teams/{id}`: when it
+was created, how many are in it and how much is open, a field to rename it, the
+members with their roles, the invites into it, and deletion. The member list is the
+one thing there that needed a new endpoint — `GET /api/teams/{id}/members` is
+member-only and answers `404` to an administrator who is not in the team, which is
+the rule and not an oversight, so the page reads `GET /api/admin/teams/{id}` instead.
+An administrator still sees none of that team's incidents, alerts or rota.
+
+A name in the user list opens **that person's page**, at `/admin/users/{id}`: their
+email and when they joined, where their notifications go, whether they are an
+administrator, whether the account is disabled, the teams they are in with their
+role in each, a password field for a first or forgotten one, and deletion. It is
+the one place membership is edited from the person's side — the Team tab answers
+"who is in this team", and answering "which teams is this person in" there means
+visiting each team in turn.

 ### Docker

@@ -339,10 +376,20 @@ exactly as it was rather than with a hole in it.
 ### Push notifications

 With `TERDUT_NTFY_URL` set, an incident that opens is pushed to the on-call
-person's phone through [ntfy](https://ntfy.sh). Set each user's topic with
-`PUT /api/users/{id}/notify`; a user with no topic falls back to
-`TERDUT_NTFY_FALLBACK_TOPIC`, as does an incident that opens with nobody on call.
-If neither yields a topic, nothing is queued.
+person's phone through [ntfy](https://ntfy.sh). Everybody sets their own topic
+under *Account* in the web UI, where a **Send a test push** button proves it
+before an incident has to; `PUT /api/users/{id}/notify` is the same thing over
+the API, and an administrator may set somebody else's. A user with no topic
+falls back to `TERDUT_NTFY_FALLBACK_TOPIC`, as does an incident that opens with
+nobody on call. If neither yields a topic, nothing is queued.
+
+The **server** is the install's one ntfy, from `TERDUT_NTFY_URL`, and is not
+something a user picks. Only the topic is per-person.
+
+A topic is a shared secret with the ntfy server: anyone who knows it can both
+read the pages and publish to it, so an unguessable one is worth the trouble.
+That is also why the topic never appears in an incident's timeline, which every
+API key can read.

 Three things get pushed:

@@ -466,19 +513,27 @@ nothing unless something downstream notices it stop. That is what
 `TERDUT_DEADMAN_MATCHERS` defaults to.

 **Switches belong to a team**, which decides which of its own alerts are
-heartbeats and how long a silence has to last. An owner sets them through
-`PUT /api/teams/{teamID}/deadman`; a missed heartbeat opens an incident in the
-team whose integration received it.
+heartbeats and how long a silence has to last. Each **switch** is a row of its
+own — a name, one matcher, a timeout and a severity — so switches in one team
+can have different deadlines. An owner adds and removes them on **Team →
+Switches**, which lists each with a status (**healthy**, **dead**, or
+**dormant** until its first heartbeat), when it was last heard from, and when it
+last opened an incident; a matcher that several clusters satisfy is broken down
+per cluster. The API is `POST`/`DELETE /api/teams/{teamID}/deadman/switches`. A
+missed heartbeat opens an incident in the team whose integration received it.
+Removing a switch stops the watching; an incident it already opened stays open
+until somebody resolves it.

-The environment variables are the starting point, not the setting: at startup
-every team **without** a configuration of its own is given one from them, and an
-owner's later edit is never overwritten by a redeploy. A team created after
-that starts watching nothing until its owner says otherwise — inheriting an
-install-wide heartbeat would page a new team about a source it has never heard
-of.
+The environment variables are the starting point, not the setting: the **first**
+time the server starts, every team is given a switch per default matcher from
+them, once. After that a team's switches are its own — an owner's edit or
+deletion is never put back by a redeploy. A team created later starts watching
+nothing until its owner says otherwise — inheriting an install-wide heartbeat
+would page a new team about a source it has never heard of.

 A matcher is a set of exact label conditions, one of which must be the
-`alertname`, in the same format the environment variable uses:
+`alertname`, in the format the environment variable uses (one matcher per switch; the
+variable takes several, separated by `;`):

 ```
 alertname=Watchdog,cluster=prod; alertname=EdgeHeartbeat
@@ -550,6 +605,25 @@ granting the flag itself. Everybody else works incidents — acknowledging,
 assigning, snoozing, resolving, noting — and manages their own account and
 nobody else's. An API key carries exactly the rights of the user it belongs to.

+**Getting an account.** The first one comes from `/api/bootstrap`. After that
+it depends on `signup_mode`, an administrator setting:
+
+- `invite_only` (the default) — a team owner mints a link with
+  `POST /api/teams/{teamID}/invites`, and the person who opens it picks a
+  username and password and lands in that team with the role the link carries.
+  Links are single-use unless told otherwise, expire after seven days, and can
+  be revoked before that.
+- `open` — anybody who can reach the server can create an account, and must
+  name a team, which they then own.
+
+Invites are **links, not email**: this server has no SMTP, and adding it to send
+one message would be a subsystem to run, secure and monitor. Send the link
+however you already talk to the person.
+
+A domain-restricted third mode was considered and dropped: with no email there
+is nothing to verify an address against, so it would only check the domain of a
+string somebody typed.
+
 The first user, from `/api/bootstrap`, is an administrator. Users created
 afterwards are not, until an administrator says so. An install always keeps at
 least one: the last administrator can be neither deleted nor demoted, and
@@ -560,10 +634,16 @@ Endpoints that require the flag answer `403` with

 **Teams** are the unit of tenancy, and are a separate axis from the administrator
 flag. A team owns its incidents, alerts, schedule and integrations, and a user
-sees exactly the teams they belong to — an administrator is not implicitly in
-every team, because administration is about accounts, not about reading other
-people's incidents. Within a team an **owner** configures it (schedule,
-integrations, membership) and a **member** works its incidents.
+sees exactly the teams they belong to. Within a team an **owner** configures it
+(schedule, integrations, membership) and a **member** works its incidents.
+
+An administrator crosses that line in one direction only. They **configure any
+team** without being in it — every owner-only endpoint accepts the flag, because
+otherwise a team whose last owner left could never be repaired. They do **not
+read any team**: the queue, the alerts and the incidents are filtered by real
+membership, so an administrator sees a team's work only by joining it, which is
+a membership change and shows up as one. Administration is about accounts and
+the shape of a team, not about reading other people's incidents.

 Anything belonging to a team you are not in answers `404`, not `403`: whether an
 incident exists is itself something only its team should learn.
@@ -584,8 +664,11 @@ on anybody's.

 | Method | Path | Who | Description |
 |---|---|---|---|
+| `GET` | `/api/signup` | — | Whether sign-up is open, and whether `?invite=` is usable. No session needed: the caller has no account yet |
+| `POST` | `/api/signup` | — | Create an account `{"username","email","password","invite"?,"team_name"?}` and sign in. `403` without a usable invite when the mode is invite-only |
 | `POST` | `/api/bootstrap` | — | Create first user + API key `{"username","email","password"?}` (only works on empty DB). The user is an administrator |
 | `GET` | `/api/users` | any | List users. Open to everybody: the queue's assignment control and the schedule both have to name people |
+| `GET` | `/api/users/{id}/teams` | self or admin | The teams that user is in, each with their role. `/api/teams` is always about the caller; this one answers it about somebody else, for the admin page's per-user view. `404` for a user who does not exist, so "no teams" and "no such person" are distinguishable |
 | `POST` | `/api/users` | **admin** | Create user `{"username","email"}`. Not an administrator |
 | `DELETE` | `/api/users/{id}` | **admin** | Delete user (cascades to keys). `409` for yourself or the last administrator |
 | `PUT` | `/api/users/{id}/admin` | **admin** | Grant or revoke the administrator flag `{"is_admin"}`. `409` for yourself or the last administrator |
@@ -600,8 +683,9 @@ on anybody's.
 | Method | Path | Who | Description |
 |---|---|---|---|
 | `GET` | `/api/admin/teams` | **admin** | Every team on the server, with its member and open-incident counts. `/api/teams` answers "what am I in"; this answers "what is there" |
+| `GET` | `/api/admin/teams/{teamID}` | **admin** | One team and who is in it: `{"team", "members"}`. `404` for a team that does not exist. `GET /api/teams/{teamID}/members` is **member**-only and still `404`s an administrator from outside the team — reading a team's shape and reading its work are different questions, so they are different endpoints |
 | `GET` | `/api/admin/settings` | **admin** | The editable settings with their bounds, plus the environment-configured ones, read-only. Never credentials |
-| `PUT` | `/api/admin/settings` | **admin** | Change one or more `{"key": seconds}`. `400` for an unknown key or a value outside its bounds |
+| `PUT` | `/api/admin/settings` | **admin** | Change one or more `{"key": seconds}`, or `{"signup_mode": "open"\|"invite_only"}`. `400` for an unknown key or a value outside its bounds |

 ### Alert ingestion

@@ -620,6 +704,11 @@ and was removed in v0.13.0 once senders had moved onto keys.

 ### Teams

+**owner** below means an owner of that team *or* a system administrator, who
+passes every one of these without being a member — see
+[Authentication](#authentication). **member** means membership and nothing else: an
+administrator who is not in the team gets the same `404` as anybody else.
+
 | Method | Path | Who | Description |
 |---|---|---|---|
 | `GET` | `/api/teams` | any | The caller's own teams, each with their role |
@@ -632,10 +721,14 @@ and was removed in v0.13.0 once senders had moved onto keys.
 | `GET` | `/api/teams/{teamID}/integrations` | member | List integrations. Never returns keys |
 | `POST` | `/api/teams/{teamID}/integrations` | **owner** | Mint an integration `{"name","kind"}` — key and URL shown once |
 | `DELETE` | `/api/teams/{teamID}/integrations/{integrationID}` | **owner** | Revoke an integration |
+| `GET` | `/api/teams/{teamID}/invites` | **owner** | The team's invite links, with their uses and expiry. Never the tokens |
+| `POST` | `/api/teams/{teamID}/invites` | **owner** | Mint one `{"role","max_uses"}` — the full URL is returned once |
+| `DELETE` | `/api/teams/{teamID}/invites/{inviteID}` | **owner** | Revoke a link before it expires |
 | `GET` | `/api/teams/{teamID}/escalation` | member | The team's [escalation ladder](#escalation) `{repeat_count, fallback_topic, levels[]}`. Empty levels means the team has none |
 | `PUT` | `/api/teams/{teamID}/escalation` | **owner** | Replace it wholesale. `400` for a level with no targets or no timeout — a rung that pages nobody is a silence with a number on it |
-| `GET` | `/api/teams/{teamID}/deadman` | member | The team's [dead man's switch](#dead-mans-switch) configuration `{matchers, timeout_seconds, severity}` |
-| `PUT` | `/api/teams/{teamID}/deadman` | **owner** | Replace it. `400` when no matcher names an `alertname`, because a switch that silently watches nothing is the failure this feature exists to prevent |
+| `GET` | `/api/teams/{teamID}/deadman/switches` | member | The team's [dead man's switches](#dead-mans-switch), each `{id, name, matcher, timeout_seconds, severity, status, last_heartbeat_at, last_triggered_at, open_incident_id, sources[]}`. `status` is `healthy`, `dead` or `dormant`; `sources` has one entry per heartbeat fingerprint. Empty when the team watches nothing |
+| `POST` | `/api/teams/{teamID}/deadman/switches` | **owner** | Add one: `{name?, matcher, timeout_seconds, severity?}`. `400` when the matcher names no `alertname` or holds several, or the timeout is not positive — a switch that silently watches nothing is the failure this feature exists to prevent |
+| `DELETE` | `/api/teams/{teamID}/deadman/switches/{switchID}` | **owner** | Stop watching. An incident it opened stays open. `404` for a switch of another team |

 ### Notifications

@@ -880,8 +973,8 @@ What changes, and will need attention:

 **Dead man's switches moved too.** `TERDUT_DEADMAN_MATCHERS`, `_TIMEOUT` and
 `_SEVERITY` are no longer the setting; they are the default each existing team
-is seeded with at startup, after which an owner edits them per team through
-`PUT /api/teams/{teamID}/deadman` and a redeploy never overwrites that.
+is seeded with at startup, after which an owner manages them per team through
+`/api/teams/{teamID}/deadman/switches` and a redeploy never overwrites that.

 Nothing else about an incident changes, and incidents never move between teams:
 an alert belongs to whichever team's key it arrived on.
@@ -15,5 +15,5 @@ type: application
 # appVersion and image.tag in values.yaml no longer agree, and that is not an oversight:
 # image.tag stays "latest", which is what a local install actually pulls. appVersion is
 # metadata and drives nothing.
-version: 0.14.0
-appVersion: "v0.14.0"
+version: 0.24.0
+appVersion: "v0.24.0"
@@ -237,6 +237,246 @@ func TestAdmin_GrantAndRevokeChangeWhatIsAllowed(t *testing.T) {
 	}
 }

+// An administrator passes every team-owner check without being in the team,
+// which is what lets them repair a team whose owner has left. It has been true
+// since teams landed and nothing pinned it, so a later reading of the epic's
+// "an admin is not implicitly in every team" could quietly take it away.
+//
+// The line it draws: configuring a team, yes; reading what the team owns, no.
+// The queue below is the half that stays shut.
+func TestAdmin_ConfiguresATeamTheyAreNotIn(t *testing.T) {
+	s := newTS(t)
+
+	// A team the admin is deliberately not a member of. It is created by
+	// somebody else, so the admin's only claim on it is the flag.
+	_, call := member(t, s, "founder")
+	var team struct {
+		ID int64 `json:"id"`
+	}
+	decode(t, call(http.MethodPost, "/api/teams", map[string]string{"name": "theirs"}), &team)
+	if team.ID == 0 {
+		t.Fatal("no team was created")
+	}
+
+	var mine []struct {
+		ID int64 `json:"id"`
+	}
+	decode(t, s.req(t, http.MethodGet, "/api/teams", nil), &mine)
+	for _, m := range mine {
+		if m.ID == team.ID {
+			t.Fatalf("the admin should not be a member of team %d", team.ID)
+		}
+	}
+
+	path := "/api/teams/" + id64(team.ID)
+	for _, c := range []struct {
+		name   string
+		method string
+		path   string
+		body   any
+		want   int
+	}{
+		{"rename it", http.MethodPut, path,
+			map[string]string{"name": "theirs, renamed"}, http.StatusNoContent},
+		{"mint an invite", http.MethodPost, path + "/invites",
+			map[string]any{"role": "member", "max_uses": 1}, http.StatusCreated},
+		{"add a member", http.MethodPost, path + "/members",
+			map[string]any{"user_id": 1, "role": "member"}, http.StatusNoContent},
+		{"remove a member", http.MethodDelete, path + "/members/1", nil, http.StatusNoContent},
+	} {
+		resp := s.req(t, c.method, c.path, c.body)
+		resp.Body.Close()
+		if resp.StatusCode != c.want {
+			t.Errorf("%s: expected %d, got %d", c.name, c.want, resp.StatusCode)
+		}
+	}
+
+	// The other half of the rule. An incident in that team is not the admin's
+	// to read, because administration is about accounts — and the last case
+	// above has just taken the admin back out of the membership.
+	var integration struct {
+		Key string `json:"key"`
+	}
+	decode(t, call(http.MethodPost, path+"/integrations",
+		map[string]string{"name": "theirs alertmanager"}), &integration)
+	postToIntegration(t, s, integration.Key, "fp-theirs", "TheirDiskFull")
+
+	var incidents []struct {
+		ID int64 `json:"id"`
+	}
+	decode(t, s.req(t, http.MethodGet, "/api/incidents", nil), &incidents)
+	if len(incidents) != 0 {
+		t.Errorf("the admin should see none of that team's incidents, got %d", len(incidents))
+	}
+}
+
+// The team page at /admin/teams/{id} needs the one question the test above
+// leaves shut: who is in a team the administrator is not in.
+//
+// It is answered by a separate endpoint under AdminOnly rather than by letting
+// the admin flag through requireTeamMember, and the second half of this test is
+// the reason — /api/teams/{id}/members must keep answering 404, so that "member
+// means membership and nothing else" stays true of the endpoint it was said
+// about. Reading a team's shape and reading a team's work are different things.
+func TestAdminGetTeam_ReadsAnyTeamWithoutJoiningIt(t *testing.T) {
+	s := newTS(t)
+
+	founderID, call := member(t, s, "founder")
+	var team struct {
+		ID int64 `json:"id"`
+	}
+	decode(t, call(http.MethodPost, "/api/teams", map[string]string{"name": "theirs"}), &team)
+	if team.ID == 0 {
+		t.Fatal("no team was created")
+	}
+
+	// The admin reads it whole, without being in it.
+	var got struct {
+		Team struct {
+			ID            int64  `json:"id"`
+			Name          string `json:"name"`
+			Members       int64  `json:"members"`
+			OpenIncidents int64  `json:"open_incidents"`
+		} `json:"team"`
+		Members []struct {
+			UserID   int64  `json:"user_id"`
+			Username string `json:"username"`
+			Role     string `json:"role"`
+		} `json:"members"`
+	}
+	decode(t, s.req(t, http.MethodGet, "/api/admin/teams/"+id64(team.ID), nil), &got)
+
+	if got.Team.ID != team.ID || got.Team.Name != "theirs" {
+		t.Errorf("expected team %d named theirs, got %d named %q", team.ID, got.Team.ID, got.Team.Name)
+	}
+	if got.Team.Members != 1 {
+		t.Errorf("expected a member count of 1, got %d", got.Team.Members)
+	}
+	if len(got.Members) != 1 {
+		t.Fatalf("expected one member, got %d", len(got.Members))
+	}
+	if got.Members[0].UserID != founderID || got.Members[0].Username != "founder" {
+		t.Errorf("expected founder (%d), got %q (%d)",
+			founderID, got.Members[0].Username, got.Members[0].UserID)
+	}
+	// Whoever creates a team owns it, and the page's role toggle depends on
+	// that being reported rather than assumed.
+	if got.Members[0].Role != "owner" {
+		t.Errorf("expected the creator to be owner, got %q", got.Members[0].Role)
+	}
+
+	// The rule this endpoint exists in order not to break. Same admin, same
+	// team, the member-only endpoint: still not found.
+	resp := s.req(t, http.MethodGet, "/api/teams/"+id64(team.ID)+"/members", nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNotFound {
+		t.Errorf("an admin outside the team must still get 404 from the member-only list, got %d",
+			resp.StatusCode)
+	}
+
+	// And the new one is administration, not membership: being in the team is
+	// not enough.
+	resp = call(http.MethodGet, "/api/admin/teams/"+id64(team.ID), nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Errorf("a non-admin member must get 403, got %d", resp.StatusCode)
+	}
+
+	for _, c := range []struct {
+		name string
+		path string
+		want int
+	}{
+		{"a team that does not exist", "/api/admin/teams/999999", http.StatusNotFound},
+		{"a team id that is not a number", "/api/admin/teams/nonsense", http.StatusBadRequest},
+	} {
+		resp := s.req(t, http.MethodGet, c.path, nil)
+		resp.Body.Close()
+		if resp.StatusCode != c.want {
+			t.Errorf("%s: expected %d, got %d", c.name, c.want, resp.StatusCode)
+		}
+	}
+}
+
+// A team name is trimmed when it is created, and renaming had not been, so " "
+// was a legal name to rename to and an illegal one to start with.
+func TestRenameTeam_TrimsTheName(t *testing.T) {
+	s := newTS(t)
+	var team struct {
+		ID int64 `json:"id"`
+	}
+	decode(t, s.req(t, http.MethodPost, "/api/teams", map[string]string{"name": "trimmed"}), &team)
+
+	path := "/api/teams/" + id64(team.ID)
+	resp := s.req(t, http.MethodPut, path, map[string]string{"name": "   "})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Errorf("a blank name must be refused, got %d", resp.StatusCode)
+	}
+
+	resp = s.req(t, http.MethodPut, path, map[string]string{"name": "  padded  "})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("expected 204, got %d", resp.StatusCode)
+	}
+
+	var got struct {
+		Team struct {
+			Name string `json:"name"`
+		} `json:"team"`
+	}
+	decode(t, s.req(t, http.MethodGet, "/api/admin/teams/"+id64(team.ID), nil), &got)
+	if got.Team.Name != "padded" {
+		t.Errorf("expected the name to be trimmed to %q, got %q", "padded", got.Team.Name)
+	}
+}
+
+// The admin page's per-user view asks what somebody is in. Self or admin, like
+// the rest of the per-user endpoints.
+func TestUserTeams_SelfOrAdmin(t *testing.T) {
+	s := newTS(t)
+	memberID, call := member(t, s, "joiner")
+	path := "/api/users/" + id64(memberID) + "/teams"
+
+	// member() puts them in the default team, so both readings agree on one.
+	for _, c := range []struct {
+		name string
+		do   func() *http.Response
+	}{
+		{"the admin reading somebody else's", func() *http.Response { return s.req(t, http.MethodGet, path, nil) }},
+		{"the user reading their own", func() *http.Response { return call(http.MethodGet, path, nil) }},
+	} {
+		var teams []struct {
+			ID   int64  `json:"id"`
+			Name string `json:"name"`
+			Role string `json:"role"`
+		}
+		decode(t, c.do(), &teams)
+		if len(teams) != 1 {
+			t.Fatalf("%s: expected 1 team, got %d", c.name, len(teams))
+		}
+		if teams[0].Role != "member" {
+			t.Errorf("%s: expected role member, got %q", c.name, teams[0].Role)
+		}
+	}
+
+	// Somebody else's is not theirs to read.
+	otherID, _ := member(t, s, "nosy")
+	resp := call(http.MethodGet, "/api/users/"+id64(otherID)+"/teams", nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Errorf("reading another user's teams: expected 403, got %d", resp.StatusCode)
+	}
+
+	// A user who does not exist is a 404 rather than an empty list, which is
+	// how the page tells "no teams" from "no such person".
+	resp = s.req(t, http.MethodGet, "/api/users/9999/teams", nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNotFound {
+		t.Errorf("a missing user: expected 404, got %d", resp.StatusCode)
+	}
+}
+
 // The flag has to reach the client, or the web UI cannot decide what to show.
 func TestAdmin_MeReportsTheFlag(t *testing.T) {
 	s := newTS(t)
@@ -124,7 +124,7 @@ func ingest(ctx context.Context, db *sql.DB, notify NotifyConfig, teamID int64,
 	// Which arriving alerts are heartbeats is the team's own answer, read
 	// inside the transaction so an owner editing it mid-payload cannot split
 	// one webhook across two interpretations.
-	deadman, err := deadmanConfigForTeam(ctx, tx, teamID)
+	deadman, err := deadmanSetForTeam(ctx, tx, teamID)
 	if err != nil {
 		return err
 	}
@@ -186,7 +186,7 @@ func ingest(ctx context.Context, db *sql.DB, notify NotifyConfig, teamID int64,

 // upsertAlerts stores each alert of a payload and reports what changed. Payloads
 // the ordering guard rejected are left out entirely.
-func upsertAlerts(ctx context.Context, tx *sql.Tx, deadman DeadmanConfig, teamID int64, alerts []amAlert) ([]ingested, error) {
+func upsertAlerts(ctx context.Context, tx *sql.Tx, deadman deadmanSet, teamID int64, alerts []amAlert) ([]ingested, error) {
 	now := time.Now().Unix()
 	accepted := make([]ingested, 0, len(alerts))

@@ -384,10 +384,10 @@ func openIncident(ctx context.Context, q querier, notify NotifyConfig, teamID in

 	var id int64
 	err = q.QueryRowContext(ctx, `
-		INSERT INTO incidents (team_id, group_key, title, group_labels, status, severity, triggered_at, assigned_to)
-		VALUES ($1, $2, $3, $4::jsonb, 'triggered', $5, $6, $7)
+		INSERT INTO incidents (team_id, group_key, title, group_labels, signature, status, severity, triggered_at, assigned_to)
+		VALUES ($1, $2, $3, $4::jsonb, $5, 'triggered', $6, $7, $8)
 		RETURNING id`,
-		teamID, groupKey, title, string(labelsJSON), severity,
+		teamID, groupKey, title, string(labelsJSON), incidentSignature(groupLabels, title), severity,
 		time.Now().Unix(), onCall).Scan(&id)
 	if err != nil {
 		return 0, err
@@ -88,27 +88,25 @@ func newDeadmanTS(t *testing.T, deadman api.DeadmanConfig, notify ...api.NotifyC
 	return s
 }

-// setTeamDeadman configures the default team's switches over the API, rendering
-// the matchers back into the string form the endpoint takes.
+// setTeamDeadman gives the default team one switch per configured matcher, over
+// the API, the way an owner would add them.
 func setTeamDeadman(t *testing.T, s *ts, cfg api.DeadmanConfig) {
 	t.Helper()
-	matchers := make([]string, 0, len(cfg.Matchers))
 	for _, m := range cfg.Matchers {
 		parts := []string{"alertname=" + m.Name}
 		for k, v := range m.Labels {
 			parts = append(parts, k+"="+v)
 		}
 		sort.Strings(parts[1:])
-		matchers = append(matchers, strings.Join(parts, ","))
-	}
-	resp := s.req(t, http.MethodPut, "/api/teams/"+defaultTeam+"/deadman", map[string]any{
-		"matchers":        strings.Join(matchers, "; "),
-		"timeout_seconds": int64(cfg.Timeout.Seconds()),
-		"severity":        cfg.Severity,
-	})
-	defer resp.Body.Close()
-	if resp.StatusCode != http.StatusOK {
-		t.Fatalf("configure the team's dead man's switches: %d", resp.StatusCode)
+		resp := s.req(t, http.MethodPost, "/api/teams/"+defaultTeam+"/deadman/switches", map[string]any{
+			"matcher":         strings.Join(parts, ","),
+			"timeout_seconds": int64(cfg.Timeout.Seconds()),
+			"severity":        cfg.Severity,
+		})
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusCreated {
+			t.Fatalf("add a dead man's switch: %d", resp.StatusCode)
+		}
 	}
 }

@@ -139,6 +139,34 @@ func hashPassword(pw string) (string, error) {
 	return string(h), err
 }

+// startSession mints a session and sets the cookie. Shared by login and
+// sign-up: somebody who has just chosen a password is signed in, rather than
+// being sent to a form to type the same credential again.
+func startSession(w http.ResponseWriter, r *http.Request, db *sql.DB, userID int64, publicURL string) error {
+	raw, tokenHash, err := randomToken()
+	if err != nil {
+		return err
+	}
+	now := time.Now()
+	if _, err := db.ExecContext(r.Context(), `
+		INSERT INTO sessions (token_hash, user_id, created_at, last_seen_at, expires_at, user_agent)
+		VALUES ($1, $2, $3, $4, $5, $6)`,
+		tokenHash, userID, now.Unix(), now.Unix(), now.Add(sessionTTL).Unix(), r.UserAgent()); err != nil {
+		return err
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:     sessionCookie,
+		Value:    raw,
+		Path:     "/",
+		MaxAge:   int(sessionTTL.Seconds()),
+		HttpOnly: true,
+		Secure:   cookieSecure(publicURL, r),
+		SameSite: http.SameSiteLaxMode,
+	})
+	return nil
+}
+
 // handleLogin exchanges a username and password for a session cookie.
 func handleLogin(db *sql.DB, limiter *loginLimiter, publicURL string) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
@@ -182,29 +210,10 @@ func handleLogin(db *sql.DB, limiter *loginLimiter, publicURL string) http.Handl
 		}
 		limiter.clear(userKey)

-		raw, tokenHash, err := randomToken()
-		if err != nil {
+		if err := startSession(w, r, db, userID, publicURL); err != nil {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
 		}
-		now := time.Now()
-		if _, err := db.ExecContext(r.Context(), `
-			INSERT INTO sessions (token_hash, user_id, created_at, last_seen_at, expires_at, user_agent)
-			VALUES ($1, $2, $3, $4, $5, $6)`,
-			tokenHash, userID, now.Unix(), now.Unix(), now.Add(sessionTTL).Unix(), r.UserAgent()); err != nil {
-			respond(w, http.StatusInternalServerError, errResp("internal error"))
-			return
-		}
-
-		http.SetCookie(w, &http.Cookie{
-			Name:     sessionCookie,
-			Value:    raw,
-			Path:     "/",
-			MaxAge:   int(sessionTTL.Seconds()),
-			HttpOnly: true,
-			Secure:   cookieSecure(publicURL, r),
-			SameSite: http.SameSiteLaxMode,
-		})

 		user, err := fetchUser(r.Context(), db, userID)
 		if err != nil {
@@ -243,6 +252,11 @@ func handleLogout(db *sql.DB, publicURL string) http.HandlerFunc {
 type meResponse struct {
 	User        any  `json:"user"`
 	HasPassword bool `json:"has_password"`
+
+	// OnboardingDismissed is whether this person has put the first-run
+	// checklist away. Per user rather than per browser: somebody who finishes
+	// setting up on a laptop should not be nagged again on their phone.
+	OnboardingDismissed bool `json:"onboarding_dismissed"`
 }

 // handleMe says who the caller is. The web UI calls it on load to decide
@@ -256,9 +270,15 @@ func handleMe(db *sql.DB) http.HandlerFunc {
 			return
 		}
 		var hash sql.NullString
+		var dismissed *int64
 		db.QueryRowContext(r.Context(),
-			"SELECT password_hash FROM users WHERE id = $1", caller.ID).Scan(&hash)
-		respond(w, http.StatusOK, meResponse{User: user, HasPassword: hash.Valid})
+			"SELECT password_hash, onboarding_dismissed_at FROM users WHERE id = $1",
+			caller.ID).Scan(&hash, &dismissed)
+		respond(w, http.StatusOK, meResponse{
+			User:                user,
+			HasPassword:         hash.Valid,
+			OnboardingDismissed: dismissed != nil,
+		})
 	}
 }

@@ -4,6 +4,8 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"errors"
+	"fmt"
 	"log"
 	"sort"
 	"strings"
@@ -39,6 +41,17 @@ func (m DeadmanMatcher) String() string {
 	return m.Name + " (" + strings.Join(parts, ", ") + ")"
 }

+// config renders the matcher in the form parseDeadmanMatcher reads, which is
+// what a switch row stores: `alertname=Watchdog,cluster=prod`.
+func (m DeadmanMatcher) config() string {
+	parts := make([]string, 0, len(m.Labels))
+	for k, v := range m.Labels {
+		parts = append(parts, k+"="+v)
+	}
+	sort.Strings(parts)
+	return strings.Join(append([]string{"alertname=" + m.Name}, parts...), ",")
+}
+
 // matches reports whether an alert's labels satisfy every condition.
 func (m DeadmanMatcher) matches(labels map[string]string) bool {
 	if labels["alertname"] != m.Name {
@@ -52,12 +65,10 @@ func (m DeadmanMatcher) matches(labels map[string]string) bool {
 	return true
 }

-// DeadmanConfig inverts the handling of the alerts it matches: receiving one
-// opens nothing, and the absence of one opens an incident.
-//
-// The unit of monitoring is the fingerprint, not the matcher — two clusters
-// sending the same heartbeat alertname are two independent switches, so one
-// healthy cluster cannot mask a dead one.
+// DeadmanConfig is the server-wide default a team's switches are seeded from:
+// the environment's matchers, timeout and severity. Switches themselves are rows
+// of a team's own — see DeadmanSwitch — and this is only how a fresh install
+// starts out.
 type DeadmanConfig struct {
 	Matchers []DeadmanMatcher

@@ -76,41 +87,81 @@ type DeadmanConfig struct {
 // enabled reports whether there is anything to watch.
 func (c DeadmanConfig) enabled() bool { return c.Timeout > 0 && len(c.Matchers) > 0 }

-// match returns the first matcher an alert satisfies.
-func (c DeadmanConfig) match(labels map[string]string) (DeadmanMatcher, bool) {
-	if !c.enabled() {
-		return DeadmanMatcher{}, false
-	}
-	for _, m := range c.Matchers {
-		if m.matches(labels) {
-			return m, true
-		}
-	}
-	return DeadmanMatcher{}, false
+// DeadmanSwitch inverts the handling of the alerts it matches: receiving one
+// opens nothing, and the absence of one opens an incident.
+//
+// The unit of monitoring is the fingerprint, not the switch — two clusters
+// sending the same heartbeat alertname are two independent heartbeats under one
+// switch, so one healthy cluster cannot mask a dead one.
+type DeadmanSwitch struct {
+	ID      int64
+	Name    string
+	Matcher DeadmanMatcher
+
+	// Timeout is how long a heartbeat may go unheard before it is declared dead.
+	Timeout time.Duration
+
+	// Severity is what the incident opens at.
+	Severity string
 }

-// isDeadman is match without the matcher, for the ingest path.
-func (c DeadmanConfig) isDeadman(labels map[string]string) bool {
-	_, ok := c.match(labels)
+// deadmanSet is one team's switches.
+type deadmanSet []DeadmanSwitch
+
+// match returns the first switch an alert satisfies.
+func (d deadmanSet) match(labels map[string]string) (DeadmanSwitch, bool) {
+	for _, sw := range d {
+		if sw.Matcher.matches(labels) {
+			return sw, true
+		}
+	}
+	return DeadmanSwitch{}, false
+}
+
+// isDeadman is match without the switch, for the ingest path.
+func (d deadmanSet) isDeadman(labels map[string]string) bool {
+	_, ok := d.match(labels)
 	return ok
 }

 // names lists the distinct alertnames worth loading from the database.
-func (c DeadmanConfig) names() []string {
+func (d deadmanSet) names() []string {
 	seen := map[string]bool{}
-	out := make([]string, 0, len(c.Matchers))
-	for _, m := range c.Matchers {
-		if !seen[m.Name] {
-			seen[m.Name] = true
-			out = append(out, m.Name)
+	out := make([]string, 0, len(d))
+	for _, sw := range d {
+		if !seen[sw.Matcher.Name] {
+			seen[sw.Matcher.Name] = true
+			out = append(out, sw.Matcher.Name)
 		}
 	}
 	return out
 }

+// parseDeadmanMatcher reads one matcher from its configured form: "," separates
+// the conditions and "=" is exact label equality — `alertname=Watchdog,cluster=prod`.
+// The error says what is wrong with it, in words a form can show.
+func parseDeadmanMatcher(entry string) (DeadmanMatcher, error) {
+	m := DeadmanMatcher{Labels: map[string]string{}}
+	for _, cond := range strings.Split(strings.TrimSpace(entry), ",") {
+		k, v, ok := strings.Cut(cond, "=")
+		k, v = strings.TrimSpace(k), strings.TrimSpace(v)
+		if !ok || k == "" || v == "" {
+			return DeadmanMatcher{}, fmt.Errorf("%q is not label=value", strings.TrimSpace(cond))
+		}
+		if k == "alertname" {
+			m.Name = v
+			continue
+		}
+		m.Labels[k] = v
+	}
+	if m.Name == "" {
+		return DeadmanMatcher{}, errors.New("no alertname condition")
+	}
+	return m, nil
+}
+
 // ParseDeadmanConfig reads the matcher list from its configured form:
-// ";" separates matchers, "," separates the conditions within one, and "=" is
-// exact label equality — `alertname=Watchdog,cluster=prod; alertname=Heartbeat`.
+// ";" separates matchers, and each is parsed as parseDeadmanMatcher does.
 //
 // A malformed or alertname-less entry is dropped rather than fatal, following
 // config.duration's rule that one bad tuning knob should not take the server
@@ -125,28 +176,9 @@ func ParseDeadmanConfig(matchers string, timeout time.Duration, severity string)
 		if entry == "" {
 			continue
 		}
-
-		m := DeadmanMatcher{Labels: map[string]string{}}
-		malformed := false
-		for _, cond := range strings.Split(entry, ",") {
-			k, v, ok := strings.Cut(cond, "=")
-			k, v = strings.TrimSpace(k), strings.TrimSpace(v)
-			if !ok || k == "" || v == "" {
-				log.Printf("deadman: ignoring matcher %q: %q is not label=value", entry, strings.TrimSpace(cond))
-				malformed = true
-				break
-			}
-			if k == "alertname" {
-				m.Name = v
-				continue
-			}
-			m.Labels[k] = v
-		}
-		if malformed {
-			continue
-		}
-		if m.Name == "" {
-			log.Printf("deadman: ignoring matcher %q: no alertname condition", entry)
+		m, err := parseDeadmanMatcher(entry)
+		if err != nil {
+			log.Printf("deadman: ignoring matcher %q: %v", entry, err)
 			continue
 		}
 		cfg.Matchers = append(cfg.Matchers, m)
@@ -162,23 +194,35 @@ func ParseDeadmanConfig(matchers string, timeout time.Duration, severity string)
 		for _, m := range cfg.Matchers {
 			rendered = append(rendered, m.String())
 		}
-		log.Printf("deadman: watching %s, timeout %s, severity %s",
+		log.Printf("deadman: default for new teams: %s, timeout %s, severity %s",
 			strings.Join(rendered, "; "), timeout, severity)
 	}
 	return cfg
 }

-// deadmanAlert is one switch: the alert row carrying its last heartbeat.
+// deadmanAlert is one heartbeat: the alert row carrying its last sighting, and
+// the switch that claimed it.
 type deadmanAlert struct {
 	id          int64
 	teamID      int64
 	fingerprint string
 	labels      map[string]string
-	matcher     DeadmanMatcher
+	sw          DeadmanSwitch
 	resolved    bool
 	receivedAt  int64
 }

+// dead is the one rule for a silent heartbeat, shared by the sweeper that pages
+// on it and the status the Switches page shows, so the page cannot disagree
+// with the pager.
+//
+// An explicit resolved from Alertmanager is a stronger death signal than mere
+// absence: the sender is telling us the heartbeat stopped, so there is nothing
+// left to wait out.
+func (a deadmanAlert) dead(now time.Time) bool {
+	return a.resolved || a.receivedAt < now.Add(-a.sw.Timeout).Unix()
+}
+
 // groupKey is the switch's identity as an incident. Per fingerprint, so each
 // source is tracked on its own.
 func (a deadmanAlert) groupKey() string { return deadmanGroupPrefix + a.fingerprint }
@@ -189,13 +233,13 @@ func (a deadmanAlert) groupKey() string { return deadmanGroupPrefix + a.fingerpr
 // It returns the ids of the alerts it owns, because the generic staleness
 // expiry must leave them alone — staleAfter and ends_at would otherwise resolve
 // a heartbeat long before its own, much tighter, timeout ever fired.
-// Each team is swept against its own configuration: its own matchers, its own
-// timeout, its own severity. A team watching nothing is skipped entirely, which
-// is most of them.
+// Each team is swept against its own switches, each with its own matcher,
+// timeout and severity. A team watching nothing is skipped entirely, which is
+// most of them.
 func sweepDeadman(ctx context.Context, db *sql.DB, notify NotifyConfig) map[int64]bool {
 	owned := map[int64]bool{}

-	configs, err := deadmanConfigs(ctx, db)
+	configs, err := deadmanSets(ctx, db)
 	if err != nil {
 		log.Printf("deadman: load configs: %v", err)
 		return owned
@@ -203,39 +247,35 @@ func sweepDeadman(ctx context.Context, db *sql.DB, notify NotifyConfig) map[int6

 	now := time.Now()
 	for teamID, cfg := range configs {
-		switches, err := deadmanAlerts(ctx, db, teamID, cfg)
+		heartbeats, err := deadmanAlerts(ctx, db, teamID, cfg)
 		if err != nil {
-			log.Printf("deadman: load switches for team %d: %v", teamID, err)
+			log.Printf("deadman: load heartbeats for team %d: %v", teamID, err)
 			continue
 		}
-		cutoff := now.Add(-cfg.Timeout).Unix()

-		for _, sw := range switches {
-			owned[sw.id] = true
+		for _, hb := range heartbeats {
+			owned[hb.id] = true

-			// An explicit resolved from Alertmanager is a stronger death signal
-			// than mere absence: the sender is telling us the heartbeat
-			// stopped, so there is nothing left to wait out.
-			if sw.resolved || sw.receivedAt < cutoff {
-				if err := deadmanDied(ctx, db, cfg, notify, sw, now); err != nil {
-					log.Printf("deadman: open incident for %s: %v", sw.matcher.Name, err)
+			if hb.dead(now) {
+				if err := deadmanDied(ctx, db, notify, hb, now); err != nil {
+					log.Printf("deadman: open incident for %s: %v", hb.sw.Matcher.Name, err)
 				}
 				continue
 			}
-			if err := deadmanRecovered(ctx, db, sw); err != nil {
-				log.Printf("deadman: resolve incident for %s: %v", sw.matcher.Name, err)
+			if err := deadmanRecovered(ctx, db, hb); err != nil {
+				log.Printf("deadman: resolve incident for %s: %v", hb.sw.Matcher.Name, err)
 			}
 		}
 	}
 	return owned
 }

-// deadmanAlerts loads every alert row that a matcher claims. The candidate query
+// deadmanAlerts loads every alert row that one of a team's switches claims. The candidate query
 // is narrowed by alertname so it rides alerts_name_idx; the rest of the matching
 // happens in Go, which keeps one implementation of the rules. The rows are read
 // in full before the caller writes, so the writes do not run against an open
 // cursor over the same table.
-func deadmanAlerts(ctx context.Context, db *sql.DB, teamID int64, cfg DeadmanConfig) ([]deadmanAlert, error) {
+func deadmanAlerts(ctx context.Context, db *sql.DB, teamID int64, cfg deadmanSet) ([]deadmanAlert, error) {
 	names := cfg.names()
 	args := &sqlArgs{}
 	nameList := make([]any, len(names))
@@ -263,11 +303,11 @@ func deadmanAlerts(ctx context.Context, db *sql.DB, teamID int64, cfg DeadmanCon
 		}
 		json.Unmarshal([]byte(labelsJSON), &a.labels) //nolint:errcheck

-		m, ok := cfg.match(a.labels)
+		sw, ok := cfg.match(a.labels)
 		if !ok {
 			continue
 		}
-		a.matcher = m
+		a.sw = sw
 		a.resolved = status == "resolved"
 		out = append(out, a)
 	}
@@ -284,16 +324,16 @@ func deadmanAlerts(ctx context.Context, db *sql.DB, teamID int64, cfg DeadmanCon
 // incidentForGroup), and a source that is gone for good is a one-time page
 // rather than a nag. Only a heartbeat that comes back and dies again earns a new
 // incident.
-func deadmanDied(ctx context.Context, db *sql.DB, cfg DeadmanConfig, notify NotifyConfig, sw deadmanAlert, now time.Time) error {
+func deadmanDied(ctx context.Context, db *sql.DB, notify NotifyConfig, hb deadmanAlert, now time.Time) error {
 	var lastTriggered, open int64
 	if err := db.QueryRowContext(ctx, `
 		SELECT COALESCE(MAX(triggered_at), 0),
 		       COUNT(*) FILTER (WHERE resolved_at IS NULL)
 		FROM   incidents WHERE team_id = $1 AND group_key = $2`,
-		sw.teamID, sw.groupKey()).Scan(&lastTriggered, &open); err != nil {
+		hb.teamID, hb.groupKey()).Scan(&lastTriggered, &open); err != nil {
 		return err
 	}
-	if open > 0 || sw.receivedAt <= lastTriggered {
+	if open > 0 || hb.receivedAt <= lastTriggered {
 		return nil
 	}

@@ -306,18 +346,18 @@ func deadmanDied(ctx context.Context, db *sql.DB, cfg DeadmanConfig, notify Noti
 	// A heartbeat nobody has heard from is not firing, and saying otherwise in
 	// the alert list would be a lie. An Alertmanager-sourced resolution keeps its
 	// own source: it told us the truth first.
-	if !sw.resolved {
+	if !hb.resolved {
 		if _, err := tx.ExecContext(ctx, `
 			UPDATE alerts
 			   SET status            = 'resolved',
 			       resolution_source = $1,
 			       ends_at           = COALESCE(ends_at, `+nowEpoch+`)
-			 WHERE id = $2 AND status = 'firing'`, resolutionDeadman, sw.id); err != nil {
+			 WHERE id = $2 AND status = 'firing'`, resolutionDeadman, hb.id); err != nil {
 			return err
 		}
 	}

-	severity := cfg.Severity
+	severity := hb.sw.Severity
 	var sev *string
 	if severity != "" {
 		sev = &severity
@@ -325,14 +365,14 @@ func deadmanDied(ctx context.Context, db *sql.DB, cfg DeadmanConfig, notify Noti

 	// The incident opens in the team whose integration received the heartbeat:
 	// the switch belongs to whoever is watching that source, not to the install.
-	incidentID, err := openIncident(ctx, tx, notify, sw.teamID, sw.groupKey(),
-		"No heartbeat from "+sw.matcher.String(), sw.labels, sev)
+	incidentID, err := openIncident(ctx, tx, notify, hb.teamID, hb.groupKey(),
+		"No heartbeat from "+hb.sw.Matcher.String(), hb.labels, sev)
 	if err != nil {
 		return err
 	}

-	alertID := sw.id
-	detail := "last heartbeat " + humanDuration(now.Sub(time.Unix(sw.receivedAt, 0))) + " ago"
+	alertID := hb.id
+	detail := "last heartbeat " + humanDuration(now.Sub(time.Unix(hb.receivedAt, 0))) + " ago"
 	if err := logEvent(ctx, tx, incidentID, evDeadmanSilent, nil, &alertID, &detail); err != nil {
 		return err
 	}
@@ -340,7 +380,7 @@ func deadmanDied(ctx context.Context, db *sql.DB, cfg DeadmanConfig, notify Noti
 	if err := tx.Commit(); err != nil {
 		return err
 	}
-	log.Printf("deadman: %s went silent, opened incident %d", sw.matcher.String(), incidentID)
+	log.Printf("deadman: %s went silent, opened incident %d", hb.sw.Matcher.String(), incidentID)
 	return nil
 }

@@ -350,12 +390,12 @@ func deadmanDied(ctx context.Context, db *sql.DB, cfg DeadmanConfig, notify Noti
 // member alerts (linking the heartbeat would have the settled-incident cascade
 // close it on the very same sweep that opened it), so the alert-driven cascade
 // ignores it entirely and recovery is the only automatic way out.
-func deadmanRecovered(ctx context.Context, db *sql.DB, sw deadmanAlert) error {
+func deadmanRecovered(ctx context.Context, db *sql.DB, hb deadmanAlert) error {
 	var incidentID int64
 	switch err := db.QueryRowContext(ctx, `
 		SELECT id FROM incidents
 		 WHERE team_id = $1 AND group_key = $2 AND resolved_at IS NULL`,
-		sw.teamID, sw.groupKey()).Scan(&incidentID); {
+		hb.teamID, hb.groupKey()).Scan(&incidentID); {
 	case err == sql.ErrNoRows:
 		return nil
 	case err != nil:
@@ -387,116 +427,256 @@ func deadmanRecovered(ctx context.Context, db *sql.DB, sw deadmanAlert) error {
 	if err := tx.Commit(); err != nil {
 		return err
 	}
-	log.Printf("deadman: %s is back, resolved incident %d", sw.matcher.String(), incidentID)
+	log.Printf("deadman: %s is back, resolved incident %d", hb.sw.Matcher.String(), incidentID)
 	return nil
 }

 // ---------------------------------------------------------------------------
-// Per-team configuration
+// A team's switches
 // ---------------------------------------------------------------------------

-// deadmanConfigForTeam reads one team's switches. A team with no row, or with
-// nothing configured, gets a disabled config — which is the right answer rather
-// than an error: most teams watch no heartbeat at all.
-func deadmanConfigForTeam(ctx context.Context, q querier, teamID int64) (DeadmanConfig, error) {
-	var matchers, severity string
-	var timeout int64
-	err := q.QueryRowContext(ctx,
-		"SELECT matchers, timeout_seconds, severity FROM deadman_configs WHERE team_id = $1",
-		teamID).Scan(&matchers, &timeout, &severity)
-	if err == sql.ErrNoRows {
-		return DeadmanConfig{}, nil
-	}
-	if err != nil {
-		return DeadmanConfig{}, err
-	}
-	return parseDeadmanQuietly(matchers, time.Duration(timeout)*time.Second, severity), nil
-}
+const deadmanSwitchColumns = "id, team_id, name, matcher, timeout_seconds, severity"

-// deadmanConfigs reads every team's switches in one query, for the sweeper.
-func deadmanConfigs(ctx context.Context, db *sql.DB) (map[int64]DeadmanConfig, error) {
-	rows, err := db.QueryContext(ctx,
-		"SELECT team_id, matchers, timeout_seconds, severity FROM deadman_configs")
-	if err != nil {
-		return nil, err
-	}
+// scanDeadmanSwitches reads switch rows into per-team sets. A row whose matcher
+// no longer parses is skipped rather than fatal: the API refuses to store one,
+// so it can only mean a hand edit, and one bad row must not stop the others
+// from being watched.
+func scanDeadmanSwitches(rows *sql.Rows) (map[int64]deadmanSet, error) {
 	defer rows.Close()
-
-	out := map[int64]DeadmanConfig{}
+	out := map[int64]deadmanSet{}
 	for rows.Next() {
+		var sw DeadmanSwitch
 		var teamID, timeout int64
-		var matchers, severity string
-		if err := rows.Scan(&teamID, &matchers, &timeout, &severity); err != nil {
+		var matcher string
+		if err := rows.Scan(&sw.ID, &teamID, &sw.Name, &matcher, &timeout, &sw.Severity); err != nil {
 			return nil, err
 		}
-		cfg := parseDeadmanQuietly(matchers, time.Duration(timeout)*time.Second, severity)
-		if cfg.enabled() {
-			out[teamID] = cfg
+		m, err := parseDeadmanMatcher(matcher)
+		if err != nil {
+			log.Printf("deadman: switch %d has an unusable matcher %q: %v", sw.ID, matcher, err)
+			continue
 		}
+		sw.Matcher = m
+		sw.Timeout = time.Duration(timeout) * time.Second
+		out[teamID] = append(out[teamID], sw)
 	}
 	return out, rows.Err()
 }

-// SeedDeadmanConfigs gives every team without a row the server's environment
-// configuration, so the install that upgrades into per-team switches keeps
-// watching exactly what it was watching before.
+// deadmanSetForTeam reads one team's switches. A team with none gets an empty
+// set — which is the right answer rather than an error: most teams watch no
+// heartbeat at all.
+func deadmanSetForTeam(ctx context.Context, q querier, teamID int64) (deadmanSet, error) {
+	rows, err := q.QueryContext(ctx,
+		"SELECT "+deadmanSwitchColumns+" FROM deadman_switches WHERE team_id = $1 ORDER BY id", teamID)
+	if err != nil {
+		return nil, err
+	}
+	sets, err := scanDeadmanSwitches(rows)
+	return sets[teamID], err
+}
+
+// deadmanSets reads every team's switches in one query, for the sweeper.
+func deadmanSets(ctx context.Context, db *sql.DB) (map[int64]deadmanSet, error) {
+	rows, err := db.QueryContext(ctx,
+		"SELECT "+deadmanSwitchColumns+" FROM deadman_switches ORDER BY id")
+	if err != nil {
+		return nil, err
+	}
+	return scanDeadmanSwitches(rows)
+}
+
+// deadmanSeededKey is the settings row that records the environment defaults
+// were handed out. Without it, a team that deleted its last switch would get
+// the default back on the next restart.
+const deadmanSeededKey = "deadman_seeded"
+
+// SeedDeadmanConfigs gives every team the server's environment defaults as
+// switches, exactly once per install, so a fresh install watches Watchdog
+// without anybody setting it up.
 //
-// Idempotent, and never overwrites: once a team has a row it owns its own
-// configuration, and a redeploy must not quietly put the environment's value
-// back over an owner's edit.
+// Once seeded it never runs again: a team's switches are its own, and a redeploy
+// must not quietly put the environment's value back over an owner's edit or
+// deletion. Installs that upgraded from per-team configuration were already
+// seeded, which migration 009 records.
 //
-// A team created after startup gets no row and therefore watches nothing until
-// its owner says otherwise. That is deliberate: inheriting an install-wide
-// heartbeat would page a new team about a source it has never heard of, and a
-// switch nobody chose is the kind that gets muted rather than fixed.
+// A team created after that gets none and watches nothing until its owner says
+// otherwise. That is deliberate: inheriting an install-wide heartbeat would page
+// a new team about a source it has never heard of, and a switch nobody chose is
+// the kind that gets muted rather than fixed.
 func SeedDeadmanConfigs(ctx context.Context, db *sql.DB, cfg DeadmanConfig) error {
-	matchers := make([]string, 0, len(cfg.Matchers))
+	if !cfg.enabled() {
+		return nil
+	}
+
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback() //nolint:errcheck
+
+	res, err := tx.ExecContext(ctx,
+		"INSERT INTO settings (key, value) VALUES ($1, '1') ON CONFLICT (key) DO NOTHING",
+		deadmanSeededKey)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return nil
+	}
+
 	for _, m := range cfg.Matchers {
-		parts := []string{"alertname=" + m.Name}
-		for k, v := range m.Labels {
-			parts = append(parts, k+"="+v)
+		if _, err := tx.ExecContext(ctx, `
+			INSERT INTO deadman_switches (team_id, name, matcher, timeout_seconds, severity)
+			SELECT id, $1, $1, $2, $3 FROM teams`,
+			m.config(), int64(cfg.Timeout.Seconds()), cfg.Severity); err != nil {
+			return err
 		}
-		sort.Strings(parts[1:])
-		matchers = append(matchers, strings.Join(parts, ","))
 	}
-
-	_, err := db.ExecContext(ctx, `
-		INSERT INTO deadman_configs (team_id, matchers, timeout_seconds, severity)
-		SELECT id, $1, $2, $3 FROM teams
-		ON CONFLICT (team_id) DO NOTHING`,
-		strings.Join(matchers, "; "), int64(cfg.Timeout.Seconds()), cfg.Severity)
-	return err
+	return tx.Commit()
 }

-// parseDeadmanQuietly is ParseDeadmanConfig without the startup logging: a
-// team's configuration is read on every sweep and every webhook, and logging it
-// each time would bury everything else.
-func parseDeadmanQuietly(matchers string, timeout time.Duration, severity string) DeadmanConfig {
-	cfg := DeadmanConfig{Timeout: timeout, Severity: severity}
-	for _, entry := range strings.Split(matchers, ";") {
-		entry = strings.TrimSpace(entry)
-		if entry == "" {
-			continue
-		}
-		m := DeadmanMatcher{Labels: map[string]string{}}
-		malformed := false
-		for _, cond := range strings.Split(entry, ",") {
-			k, v, ok := strings.Cut(cond, "=")
-			k, v = strings.TrimSpace(k), strings.TrimSpace(v)
-			if !ok || k == "" || v == "" {
-				malformed = true
-				break
-			}
-			if k == "alertname" {
-				m.Name = v
-				continue
-			}
-			m.Labels[k] = v
-		}
-		if malformed || m.Name == "" {
-			continue
-		}
-		cfg.Matchers = append(cfg.Matchers, m)
-	}
-	return cfg
+// ---------------------------------------------------------------------------
+// Status
+// ---------------------------------------------------------------------------
+
+const (
+	switchHealthy = "healthy"
+	switchDead    = "dead"
+	switchDormant = "dormant"
+)
+
+// deadmanSource is one heartbeat under a switch: a fingerprint that matched.
+type deadmanSource struct {
+	Fingerprint     string            `json:"fingerprint"`
+	Labels          map[string]string `json:"labels"`
+	Status          string            `json:"status"`
+	LastHeartbeatAt time.Time         `json:"last_heartbeat_at"`
+	LastTriggeredAt *time.Time        `json:"last_triggered_at"`
+	IncidentID      *int64            `json:"incident_id"`
+}
+
+// deadmanSwitchStatus is a switch as the Switches page shows it.
+type deadmanSwitchStatus struct {
+	ID             int64  `json:"id"`
+	Name           string `json:"name"`
+	Matcher        string `json:"matcher"`
+	TimeoutSeconds int64  `json:"timeout_seconds"`
+	Severity       string `json:"severity"`
+
+	// Status is dead when any source is, dormant when none has ever been heard
+	// from, healthy otherwise — a live cluster must not hide a dead one.
+	Status          string          `json:"status"`
+	LastHeartbeatAt *time.Time      `json:"last_heartbeat_at"`
+	LastTriggeredAt *time.Time      `json:"last_triggered_at"`
+	OpenIncidentID  *int64          `json:"open_incident_id"`
+	Sources         []deadmanSource `json:"sources"`
+}
+
+// deadmanStatuses reports every switch of a team with what its heartbeats are
+// doing. The liveness verdict is deadmanAlert.dead, the sweeper's own.
+func deadmanStatuses(ctx context.Context, db *sql.DB, teamID int64, set deadmanSet, now time.Time) ([]deadmanSwitchStatus, error) {
+	out := make([]deadmanSwitchStatus, 0, len(set))
+	if len(set) == 0 {
+		return out, nil
+	}
+
+	heartbeats, err := deadmanAlerts(ctx, db, teamID, set)
+	if err != nil {
+		return nil, err
+	}
+
+	// One query for every switch's incident history, keyed the way the sweeper
+	// keys it.
+	type history struct {
+		triggeredAt int64
+		openID      int64
+	}
+	incidents := map[string]history{}
+	rows, err := db.QueryContext(ctx, `
+		SELECT group_key, MAX(triggered_at), COALESCE(MAX(id) FILTER (WHERE resolved_at IS NULL), 0)
+		FROM   incidents
+		WHERE  team_id = $1 AND group_key LIKE $2
+		GROUP  BY group_key`, teamID, deadmanGroupPrefix+"%")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var key string
+		var h history
+		if err := rows.Scan(&key, &h.triggeredAt, &h.openID); err != nil {
+			return nil, err
+		}
+		incidents[key] = h
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	bySwitch := map[int64][]deadmanAlert{}
+	for _, hb := range heartbeats {
+		bySwitch[hb.sw.ID] = append(bySwitch[hb.sw.ID], hb)
+	}
+
+	later := func(cur *time.Time, unix int64) *time.Time {
+		t := time.Unix(unix, 0).UTC()
+		if cur == nil || t.After(*cur) {
+			return &t
+		}
+		return cur
+	}
+
+	for _, sw := range set {
+		st := deadmanSwitchStatus{
+			ID: sw.ID, Name: sw.Name, Matcher: sw.Matcher.config(),
+			TimeoutSeconds: int64(sw.Timeout.Seconds()), Severity: sw.Severity,
+			Status: switchDormant, Sources: []deadmanSource{},
+		}
+
+		for _, hb := range bySwitch[sw.ID] {
+			src := deadmanSource{
+				Fingerprint:     hb.fingerprint,
+				Labels:          hb.labels,
+				Status:          switchHealthy,
+				LastHeartbeatAt: time.Unix(hb.receivedAt, 0).UTC(),
+			}
+			if hb.dead(now) {
+				src.Status = switchDead
+			}
+			if h, ok := incidents[hb.groupKey()]; ok {
+				t := time.Unix(h.triggeredAt, 0).UTC()
+				src.LastTriggeredAt = &t
+				st.LastTriggeredAt = later(st.LastTriggeredAt, h.triggeredAt)
+				if h.openID != 0 {
+					id := h.openID
+					src.IncidentID = &id
+					if st.OpenIncidentID == nil || id > *st.OpenIncidentID {
+						st.OpenIncidentID = &id
+					}
+				}
+			}
+			st.LastHeartbeatAt = later(st.LastHeartbeatAt, hb.receivedAt)
+			st.Sources = append(st.Sources, src)
+
+			switch {
+			case src.Status == switchDead:
+				st.Status = switchDead
+			case st.Status == switchDormant:
+				st.Status = switchHealthy
+			}
+		}
+
+		// Dead ones first, then by fingerprint: what needs attention leads, and
+		// the order does not shuffle between refreshes.
+		sort.Slice(st.Sources, func(i, j int) bool {
+			a, b := st.Sources[i], st.Sources[j]
+			if (a.Status == switchDead) != (b.Status == switchDead) {
+				return a.Status == switchDead
+			}
+			return a.Fingerprint < b.Fingerprint
+		})
+		out = append(out, st)
+	}
+	return out, nil
 }
@@ -1,6 +1,7 @@
 package api_test

 import (
+	"context"
 	"net/http"
 	"strings"
 	"testing"
@@ -483,13 +484,13 @@ func TestDeadman_ConfigurationIsPerTeam(t *testing.T) {
 	unwatched := newTeam(t, s, "unwatched")

 	// Only the first team calls Watchdog a heartbeat.
-	resp := s.req(t, http.MethodPut, "/api/teams/"+id64(watched.id)+"/deadman", map[string]any{
-		"matchers":        "alertname=Watchdog",
+	resp := s.req(t, http.MethodPost, "/api/teams/"+id64(watched.id)+"/deadman/switches", map[string]any{
+		"matcher":         "alertname=Watchdog",
 		"timeout_seconds": 3600,
 		"severity":        "critical",
 	})
 	resp.Body.Close()
-	if resp.StatusCode != http.StatusOK {
+	if resp.StatusCode != http.StatusCreated {
 		t.Fatalf("configure the watched team: %d", resp.StatusCode)
 	}

@@ -550,9 +551,9 @@ func TestDeadman_ConfigurationIsOwnerOnly(t *testing.T) {
 	decode(t, s.req(t, http.MethodPost, "/api/users/"+id64(user.ID)+"/api-keys",
 		map[string]string{"name": "test"}), &key)

-	req, _ := http.NewRequest(http.MethodPut,
-		s.URL+"/api/teams/"+id64(team.id)+"/deadman",
-		strings.NewReader(`{"matchers":"alertname=Watchdog","timeout_seconds":60}`))
+	req, _ := http.NewRequest(http.MethodPost,
+		s.URL+"/api/teams/"+id64(team.id)+"/deadman/switches",
+		strings.NewReader(`{"matcher":"alertname=Watchdog","timeout_seconds":60}`))
 	req.Header.Set("Authorization", "Bearer "+key.Key)
 	req.Header.Set("Content-Type", "application/json")
 	resp, err := http.DefaultClient.Do(req)
@@ -564,7 +565,7 @@ func TestDeadman_ConfigurationIsOwnerOnly(t *testing.T) {
 		t.Errorf("a member editing the switches: expected 403, got %d", resp.StatusCode)
 	}

-	read, _ := http.NewRequest(http.MethodGet, s.URL+"/api/teams/"+id64(team.id)+"/deadman", nil)
+	read, _ := http.NewRequest(http.MethodGet, s.URL+"/api/teams/"+id64(team.id)+"/deadman/switches", nil)
 	read.Header.Set("Authorization", "Bearer "+key.Key)
 	got, err := http.DefaultClient.Do(read)
 	if err != nil {
@@ -577,16 +578,165 @@ func TestDeadman_ConfigurationIsOwnerOnly(t *testing.T) {
 }

 // A matcher with no alertname watches nothing, silently, which is the failure
-// this feature exists to prevent — so it is refused at the door.
-func TestDeadman_UnusableMatchersAreRejected(t *testing.T) {
+// this feature exists to prevent — so it is refused at the door, along with the
+// other things that would make a switch unable to fire.
+func TestDeadman_UnusableSwitchesAreRejected(t *testing.T) {
 	s, _ := deadmanTS(t, deadmanCfg())

-	resp := s.req(t, http.MethodPut, "/api/teams/"+defaultTeam+"/deadman", map[string]any{
-		"matchers":        "cluster=prod",
-		"timeout_seconds": 900,
-	})
-	resp.Body.Close()
-	if resp.StatusCode != http.StatusBadRequest {
-		t.Errorf("expected 400 for a matcher with no alertname, got %d", resp.StatusCode)
+	for name, body := range map[string]map[string]any{
+		"no alertname":  {"matcher": "cluster=prod", "timeout_seconds": 900},
+		"malformed":     {"matcher": "alertname=Watchdog,garbage", "timeout_seconds": 900},
+		"several":       {"matcher": "alertname=A; alertname=B", "timeout_seconds": 900},
+		"zero timeout":  {"matcher": "alertname=Watchdog", "timeout_seconds": 0},
+		"bad severity":  {"matcher": "alertname=Watchdog", "timeout_seconds": 900, "severity": "loud"},
+		"empty matcher": {"matcher": "", "timeout_seconds": 900},
+	} {
+		resp := s.req(t, http.MethodPost, "/api/teams/"+defaultTeam+"/deadman/switches", body)
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusBadRequest {
+			t.Errorf("%s: expected 400, got %d", name, resp.StatusCode)
+		}
+	}
+}
+
+// ---------------------------------------------------------------------------
+// The switch list
+// ---------------------------------------------------------------------------
+
+// listSwitches reads the default team's switches as the Switches page does.
+func listSwitches(t *testing.T, s *ts) []map[string]any {
+	t.Helper()
+	return list(t, s.req(t, http.MethodGet, "/api/teams/"+defaultTeam+"/deadman/switches", nil))
+}
+
+// A switch is healthy while its heartbeat is fresh, dead once it is silent, and
+// dormant until the first one arrives.
+func TestDeadman_ListReportsStatus(t *testing.T) {
+	s, _ := deadmanTS(t, api.ParseDeadmanConfig("alertname=Watchdog; alertname=NeverSent", time.Hour, "critical"))
+
+	got := listSwitches(t, s)
+	if len(got) != 2 {
+		t.Fatalf("expected 2 switches, got %d", len(got))
+	}
+	for _, sw := range got {
+		if sw["status"] != "dormant" || sw["last_heartbeat_at"] != nil || sw["last_triggered_at"] != nil {
+			t.Errorf("a switch nobody has heard from should be dormant and blank, got %v", sw)
+		}
+	}
+
+	heartbeat(t, s, "fp-watchdog", nil)
+	got = listSwitches(t, s)
+	if got[0]["status"] != "healthy" || got[0]["last_heartbeat_at"] == nil {
+		t.Errorf("a fresh heartbeat should be healthy with a timestamp, got %v", got[0])
+	}
+	if got[1]["status"] != "dormant" {
+		t.Errorf("the other switch is still dormant, got %v", got[1]["status"])
+	}
+
+	silence(t, s, "fp-watchdog", 2*time.Hour)
+	sweep(t, s, noArchive)
+	got = listSwitches(t, s)
+	if got[0]["status"] != "dead" {
+		t.Fatalf("a silent heartbeat should be dead, got %v", got[0]["status"])
+	}
+	if got[0]["last_triggered_at"] == nil || got[0]["open_incident_id"] == nil {
+		t.Errorf("a dead switch should show when it triggered and its open incident, got %v", got[0])
+	}
+}
+
+// One matcher, several clusters: the switch is as bad as its worst heartbeat and
+// each heartbeat is listed on its own.
+func TestDeadman_ListBreaksDownByFingerprint(t *testing.T) {
+	s, _ := deadmanTS(t, deadmanCfg())
+
+	heartbeat(t, s, "fp-a", map[string]string{"cluster": "a"})
+	heartbeat(t, s, "fp-b", map[string]string{"cluster": "b"})
+	silence(t, s, "fp-b", 2*time.Hour)
+
+	sw := listSwitches(t, s)[0]
+	if sw["status"] != "dead" {
+		t.Errorf("one dead cluster makes the switch dead, got %v", sw["status"])
+	}
+	sources := sw["sources"].([]any)
+	if len(sources) != 2 {
+		t.Fatalf("expected 2 sources, got %d", len(sources))
+	}
+	first, second := sources[0].(map[string]any), sources[1].(map[string]any)
+	if first["fingerprint"] != "fp-b" || first["status"] != "dead" || second["status"] != "healthy" {
+		t.Errorf("the dead source should lead, got %v then %v", first, second)
+	}
+}
+
+// Every switch keeps its own deadline.
+func TestDeadman_TimeoutsArePerSwitch(t *testing.T) {
+	s, _ := deadmanTS(t, deadmanCfg())
+	resp := s.req(t, http.MethodPost, "/api/teams/"+defaultTeam+"/deadman/switches", map[string]any{
+		"matcher": "alertname=Edge", "timeout_seconds": 300,
+	})
+	resp.Body.Close()
+
+	heartbeat(t, s, "fp-watchdog", nil)
+	postWebhook(t, s, []map[string]any{
+		amAlert("fp-edge", "Edge", "firing", "2026-05-20T10:00:00Z", zeroTime, nil),
+	}, `{}:{alertname="Edge"}`)
+
+	// Ten minutes of silence: past the Edge switch's five, inside Watchdog's hour.
+	silence(t, s, "fp-watchdog", 10*time.Minute)
+	silence(t, s, "fp-edge", 10*time.Minute)
+
+	got := listSwitches(t, s)
+	if got[0]["status"] != "healthy" || got[1]["status"] != "dead" {
+		t.Errorf("want Watchdog healthy and Edge dead, got %v and %v", got[0]["status"], got[1]["status"])
+	}
+}
+
+// Deleting is an owner's, is scoped to the team, and leaves what the switch
+// already opened alone.
+func TestDeadman_DeleteIsScopedToTheTeam(t *testing.T) {
+	s, _ := deadmanTS(t, deadmanCfg())
+	other := newTeam(t, s, "other")
+
+	id := int64(listSwitches(t, s)[0]["id"].(float64))
+
+	// Another team's owner cannot reach it.
+	resp := other.call(http.MethodDelete, "/api/teams/"+id64(other.id)+"/deadman/switches/"+id64(id), nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNotFound {
+		t.Errorf("deleting another team's switch: expected 404, got %d", resp.StatusCode)
+	}
+	if got := len(listSwitches(t, s)); got != 1 {
+		t.Fatalf("the switch should have survived, %d left", got)
+	}
+
+	resp = s.req(t, http.MethodDelete, "/api/teams/"+defaultTeam+"/deadman/switches/"+id64(id), nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("deleting: expected 204, got %d", resp.StatusCode)
+	}
+	if got := len(listSwitches(t, s)); got != 0 {
+		t.Errorf("expected no switches, got %d", got)
+	}
+}
+
+// The environment's defaults are handed out once and then belong to the teams.
+func TestDeadman_SeedRunsOnce(t *testing.T) {
+	s := newTS(t)
+	cfg := api.ParseDeadmanConfig("alertname=Watchdog", time.Hour, "critical")
+
+	if err := api.SeedDeadmanConfigs(context.Background(), s.db, cfg); err != nil {
+		t.Fatalf("seed: %v", err)
+	}
+	if got := len(listSwitches(t, s)); got != 1 {
+		t.Fatalf("the first seed should add the default, got %d switches", got)
+	}
+
+	// The owner deletes it; a restart must not put it back.
+	id := int64(listSwitches(t, s)[0]["id"].(float64))
+	s.req(t, http.MethodDelete, "/api/teams/"+defaultTeam+"/deadman/switches/"+id64(id), nil).Body.Close()
+	if err := api.SeedDeadmanConfigs(context.Background(), s.db, cfg); err != nil {
+		t.Fatalf("seed again: %v", err)
+	}
+	if got := len(listSwitches(t, s)); got != 0 {
+		t.Errorf("a second seed resurrected %d switch(es)", got)
 	}
 }
@@ -36,6 +36,10 @@ const (
 	evUnsnoozed      = "unsnoozed"
 	evResolved       = "resolved"
 	evNote           = "note"
+	// evResolutionNote is the note worth finding again: what fixed it. The
+	// similar-incidents lookup and the page lead with these; plain notes are
+	// the working chatter and stay one click away.
+	evResolutionNote = "resolution_note"
 	evDeadmanSilent  = "deadman_silent"
 )

@@ -295,6 +299,34 @@ func openIncidentForAlert(ctx context.Context, q querier, alertID int64) (int64,
 	return id, err
 }

+// volatileLabels say where a problem ran this time, not what the problem is, so
+// they stay out of the signature. Migration 008's backfill lists the same set.
+var volatileLabels = map[string]bool{
+	"instance": true, "pod": true, "pod_name": true, "pod_ip": true,
+	"container": true, "container_name": true, "endpoint": true,
+}
+
+// incidentSignature identifies "the same problem" across incidents: the alert
+// name plus the stable group labels, sorted. Incidents in one team with equal
+// signatures are what the similar-incidents lookup returns. title stands in for
+// the name when the payload carried no alertname (groupless and dead man's
+// switch incidents).
+func incidentSignature(groupLabels map[string]string, title string) string {
+	name := groupLabels["alertname"]
+	if name == "" {
+		name = title
+	}
+	rest := make([]string, 0, len(groupLabels))
+	for k, v := range groupLabels {
+		if k == "alertname" || volatileLabels[k] {
+			continue
+		}
+		rest = append(rest, k+"="+v)
+	}
+	sort.Strings(rest)
+	return name + "|" + strings.Join(rest, ",")
+}
+
 // incidentTitle renders a human-readable title from Alertmanager's groupLabels,
 // leading with the alert name and appending whatever else the operator grouped
 // by. Falls back to the alert's own name when the payload carried no groupLabels.
@@ -3,6 +3,7 @@ package api
 import (
 	"database/sql"
 	"fmt"
+	"io"
 	"net/http"
 	"strconv"
 	"strings"
@@ -237,6 +238,15 @@ func handleIncidentResolve(db *sql.DB) http.HandlerFunc {
 			return
 		}
 		user, _ := userFromContext(r.Context())
+		// The body is optional: clients that predate resolution notes send none.
+		var req struct {
+			Resolution string `json:"resolution"`
+		}
+		if err := decodeJSON(r, &req); err != nil && err != io.EOF {
+			respond(w, http.StatusBadRequest, errResp("invalid request body"))
+			return
+		}
+		req.Resolution = strings.TrimSpace(req.Resolution)
 		if !updateOpenIncident(w, r, db, id,
 			`UPDATE incidents SET status = 'resolved', resolved_at = $1, resolution_source = $2
 			  WHERE id = $3 AND resolved_at IS NULL`,
@@ -252,6 +262,12 @@ func handleIncidentResolve(db *sql.DB) http.HandlerFunc {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
 		}
+		if req.Resolution != "" {
+			if err := logEvent(r.Context(), db, id, evResolutionNote, &user.ID, nil, &req.Resolution); err != nil {
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+		}
 		respondIncident(w, r, db, id)
 	}
 }
@@ -421,11 +437,17 @@ func handleCreateNote(db *sql.DB) http.HandlerFunc {
 		}
 		var req struct {
 			Content string `json:"content"`
+			// Pinned files the note as the resolution note: what fixed it.
+			Pinned bool `json:"pinned"`
 		}
 		if err := decodeJSON(r, &req); err != nil {
 			respond(w, http.StatusBadRequest, errResp("invalid request body"))
 			return
 		}
+		noteType := evNote
+		if req.Pinned {
+			noteType = evResolutionNote
+		}
 		if req.Content == "" {
 			respond(w, http.StatusBadRequest, errResp("content is required"))
 			return
@@ -440,7 +462,7 @@ func handleCreateNote(db *sql.DB) http.HandlerFunc {
 		err := db.QueryRowContext(r.Context(), `
 			INSERT INTO incident_events (incident_id, type, user_id, detail, created_at)
 			VALUES ($1, $2, $3, $4, $5)
-			RETURNING id`, id, evNote, user.ID, req.Content, now.Unix()).Scan(&eventID)
+			RETURNING id`, id, noteType, user.ID, req.Content, now.Unix()).Scan(&eventID)
 		if err != nil {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
@@ -449,7 +471,7 @@ func handleCreateNote(db *sql.DB) http.HandlerFunc {
 		respond(w, http.StatusCreated, models.IncidentEvent{
 			ID:         eventID,
 			IncidentID: id,
-			Type:       evNote,
+			Type:       noteType,
 			UserID:     &user.ID,
 			Username:   &user.Username,
 			Detail:     &req.Content,
@@ -475,8 +497,8 @@ func handleDeleteNote(db *sql.DB) http.HandlerFunc {
 		user, _ := userFromContext(r.Context())
 		res, err := db.ExecContext(r.Context(), `
 			DELETE FROM incident_events
-			 WHERE id = $1 AND incident_id = $2 AND type = $3 AND user_id = $4`,
-			eventID, id, evNote, user.ID)
+			 WHERE id = $1 AND incident_id = $2 AND type IN ($3, $4) AND user_id = $5`,
+			eventID, id, evNote, evResolutionNote, user.ID)
 		if err != nil {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
@@ -330,6 +330,16 @@ func deliver(ctx context.Context, db *sql.DB, cfg NotifyConfig, n outboxRow) err

 	msg := renderNotification(inc, n, firing, cfg)

+	// The page that opens an incident carries what fixed it last time, so the
+	// person woken up starts from that. Best effort: a failed lookup must not
+	// hold back the page itself.
+	if n.kind == notifyTriggered {
+		if sim, err := similarIncidents(ctx, db, n.incidentID, 1); err == nil && len(sim) > 0 && len(sim[0].ResolutionNotes) > 0 {
+			notes := sim[0].ResolutionNotes
+			msg.Message += "\nLast time: " + shorten(derefString(notes[len(notes)-1].Detail), 160)
+		}
+	}
+
 	// An Acknowledge button needs both a user to attribute the acknowledgement
 	// to and a URL the phone can reach. Minted per delivery, so every push
 	// carries its own short-lived token rather than reusing one.
@@ -573,6 +583,17 @@ func plural(n int) string {
 	return "s"
 }

+// shorten cuts s to at most n runes, marking the cut, and flattens newlines so
+// a multi-line note stays one line in a push.
+func shorten(s string, n int) string {
+	s = strings.Join(strings.Fields(s), " ")
+	r := []rune(s)
+	if len(r) <= n {
+		return s
+	}
+	return string(r[:n-1]) + "…"
+}
+
 // derefString reads a nullable text column as a plain string.
 func derefString(s *string) string {
 	if s == nil {
@@ -15,6 +15,12 @@ import (
 // notify disables notifications. Dead man's switches are per team and read from
 // the database, so nothing about them is wired in here.
 func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler {
+	// One limiter each, both process-wide for the life of the router: login
+	// counts failed passwords, sign-up counts account creation, and mixing the
+	// two would let a burst of sign-ups lock somebody out of logging in.
+	loginLimit := newLoginLimiter()
+	signupLimiter := newLoginLimiter()
+
 	r := chi.NewRouter()
 	r.Use(middleware.Logger)
 	r.Use(middleware.Recoverer)
@@ -39,9 +45,16 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 	// JSON 404 every unknown /api path gets.
 	r.Post("/api/integrations/{key}/alertmanager", handleIntegrationWebhook(db, notify))

+	// Signing up. Both are unauthenticated by necessity: the caller has no
+	// account yet. The info endpoint says whether the door is open and whether
+	// an invite link is good, so the form can say so before somebody picks a
+	// password.
+	r.Get("/api/signup", handleSignupInfo(db))
+	r.Post("/api/signup", handleSignup(db, signupLimiter, notify.PublicURL))
+
 	// Signing in to the web UI. Login trades a password for a session cookie,
 	// which AuthMiddleware accepts in place of an API key.
-	r.Post("/api/login", handleLogin(db, newLoginLimiter(), notify.PublicURL))
+	r.Post("/api/login", handleLogin(db, loginLimit, notify.PublicURL))
 	r.Post("/api/logout", handleLogout(db, notify.PublicURL))

 	// All other /api routes require a valid API key.
@@ -49,6 +62,10 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 		r.Use(AuthMiddleware(db))

 		r.Get("/api/me", handleMe(db))
+		r.Put("/api/me/onboarding", handleDismissOnboarding(db))
+		// Proves the topic works, which is the only part of "notifications are
+		// set up" that the person holding the phone can confirm.
+		r.Post("/api/me/notify/test", handleTestNotification(notify, db))

 		// Readable by anyone signed in: the queue's assignment control and the
 		// on-call schedule both need to name people.
@@ -57,6 +74,7 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 		// Your own account, or anybody's if you are an admin. The handlers call
 		// requireSelfOrAdmin rather than sitting behind AdminOnly, because
 		// which rule applies depends on the {id} in the path.
+		r.Get("/api/users/{id}/teams", handleUserTeams(db))
 		r.Put("/api/users/{id}/notify", handleSetNotifyTarget(db))
 		r.Put("/api/users/{id}/password", handleSetPassword(db))
 		r.Post("/api/users/{id}/api-keys", handleCreateAPIKey(db))
@@ -76,6 +94,11 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 			// What exists on this server, and how it behaves. /api/teams
 			// answers "what am I in"; this one answers "what is there".
 			r.Get("/api/admin/teams", handleAdminListTeams(db))
+			// One team and who is in it. The member list under
+			// /api/teams/{id}/members stays member-only and still 404s
+			// an administrator from outside; this is a different
+			// question, so it is a different endpoint.
+			r.Get("/api/admin/teams/{teamID}", handleAdminGetTeam(db))
 			r.Get("/api/admin/settings", handleGetSettings(db, cfg))
 			r.Put("/api/admin/settings", handleSetSettings(db))
 		})
@@ -89,6 +112,7 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 		r.Get("/api/incidents/{id}", handleGetIncident(db))
 		r.Get("/api/incidents/{id}/alerts", handleIncidentAlerts(db))
 		r.Get("/api/incidents/{id}/timeline", handleIncidentTimeline(db))
+		r.Get("/api/incidents/{id}/similar", handleIncidentSimilar(db))
 		r.Post("/api/incidents/{id}/acknowledge", handleIncidentAcknowledge(db))
 		r.Delete("/api/incidents/{id}/acknowledge", handleIncidentUnacknowledge(db))
 		r.Post("/api/incidents/{id}/resolve", handleIncidentResolve(db))
@@ -109,14 +133,20 @@ func NewRouter(db *sql.DB, notify NotifyConfig, cfg config.Config) http.Handler
 		r.Post("/api/teams/{teamID}/members", handleAddTeamMember(db))
 		r.Delete("/api/teams/{teamID}/members/{userID}", handleRemoveTeamMember(db))

+		// Invite links into this team.
+		r.Get("/api/teams/{teamID}/invites", handleListInvites(db))
+		r.Post("/api/teams/{teamID}/invites", handleCreateInvite(db, notify.PublicURL))
+		r.Delete("/api/teams/{teamID}/invites/{inviteID}", handleRevokeInvite(db))
+
 		// A team's escalation ladder: who is paged when nobody answers.
 		r.Get("/api/teams/{teamID}/escalation", handleGetEscalation(db))
 		r.Put("/api/teams/{teamID}/escalation", handleSetEscalation(db))

 		// A team's own dead man's switches: which of its alerts are heartbeats,
 		// and how long a silence has to last before somebody is paged.
-		r.Get("/api/teams/{teamID}/deadman", handleGetTeamDeadman(db))
-		r.Put("/api/teams/{teamID}/deadman", handleSetTeamDeadman(db))
+		r.Get("/api/teams/{teamID}/deadman/switches", handleListTeamDeadman(db))
+		r.Post("/api/teams/{teamID}/deadman/switches", handleCreateTeamDeadman(db))
+		r.Delete("/api/teams/{teamID}/deadman/switches/{switchID}", handleDeleteTeamDeadman(db))

 		// Integrations: where a team's alerts come in, and the key that says so.
 		r.Get("/api/teams/{teamID}/integrations", handleListIntegrations(db))
@@ -6,9 +6,11 @@ import (
 	"errors"
 	"net/http"
 	"strconv"
+	"strings"
 	"time"

 	"git.ryuvia.com/niklas/terdut-server/internal/config"
+	"git.ryuvia.com/niklas/terdut-server/internal/models"
 	"github.com/go-chi/chi/v5"
 )

@@ -90,6 +92,16 @@ func SeedSettings(ctx context.Context, db *sql.DB, cfg config.Config) error {
 type settingsResponse struct {
 	Editable map[string]settingValue `json:"editable"`
 	FromEnv  map[string]string       `json:"from_env"`
+
+	// Choices are settings that are a word from a fixed list rather than a
+	// duration. One so far: who may create an account.
+	Choices map[string]choiceValue `json:"choices"`
+}
+
+type choiceValue struct {
+	Value       string   `json:"value"`
+	Options     []string `json:"options"`
+	Description string   `json:"description"`
 }

 type settingValue struct {
@@ -104,6 +116,14 @@ func handleGetSettings(db *sql.DB, cfg config.Config) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		out := settingsResponse{
 			Editable: map[string]settingValue{},
+			Choices: map[string]choiceValue{
+				SettingSignupMode: {
+					Value:   signupMode(r.Context(), db),
+					Options: []string{SignupInviteOnly, SignupOpen},
+					Description: "who may create an account: invite_only means a link from a team owner, " +
+						"open means anybody who can reach this server",
+				},
+			},
 			FromEnv: map[string]string{
 				// Never the ntfy token or the DSN: both are credentials, and an
 				// admin page that renders them turns a browser tab into a place
@@ -137,7 +157,7 @@ func handleGetSettings(db *sql.DB, cfg config.Config) http.HandlerFunc {
 // sit in the table looking like configuration and doing nothing.
 func handleSetSettings(db *sql.DB) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		var req map[string]int64
+		var req map[string]any
 		if err := decodeJSON(r, &req); err != nil {
 			respond(w, http.StatusBadRequest, errResp("invalid request body"))
 			return
@@ -147,17 +167,37 @@ func handleSetSettings(db *sql.DB) http.HandlerFunc {
 			return
 		}

-		for key, secs := range req {
-			b, known := settingBounds[key]
-			if !known {
-				respond(w, http.StatusBadRequest, errResp("unknown setting: "+key))
-				return
-			}
-			d := time.Duration(secs) * time.Second
-			if d < b.min || d > b.max {
-				respond(w, http.StatusBadRequest, errResp(
-					key+" must be between "+b.min.String()+" and "+b.max.String()))
-				return
+		// Validate everything before writing anything: a request that sets two
+		// settings and gets one wrong should change neither.
+		values := map[string]string{}
+		for key, raw := range req {
+			switch key {
+			case SettingSignupMode:
+				mode, _ := raw.(string)
+				if mode != SignupOpen && mode != SignupInviteOnly {
+					respond(w, http.StatusBadRequest,
+						errResp("signup_mode must be "+SignupInviteOnly+" or "+SignupOpen))
+					return
+				}
+				values[key] = mode
+			default:
+				b, known := settingBounds[key]
+				if !known {
+					respond(w, http.StatusBadRequest, errResp("unknown setting: "+key))
+					return
+				}
+				secs, ok := raw.(float64) // JSON numbers decode as float64
+				if !ok {
+					respond(w, http.StatusBadRequest, errResp(key+" must be a number of seconds"))
+					return
+				}
+				d := time.Duration(int64(secs)) * time.Second
+				if d < b.min || d > b.max {
+					respond(w, http.StatusBadRequest, errResp(
+						key+" must be between "+b.min.String()+" and "+b.max.String()))
+					return
+				}
+				values[key] = strconv.FormatInt(int64(secs), 10)
 			}
 		}

@@ -168,13 +208,13 @@ func handleSetSettings(db *sql.DB) http.HandlerFunc {
 		}
 		defer tx.Rollback() //nolint:errcheck

-		for key, secs := range req {
+		for key, value := range values {
 			if _, err := tx.ExecContext(r.Context(), `
 				INSERT INTO settings (key, value, updated_at)
 				VALUES ($1, $2, `+nowEpoch+`)
 				ON CONFLICT (key) DO UPDATE SET
 					value = excluded.value, updated_at = excluded.updated_at`,
-				key, strconv.FormatInt(secs, 10)); err != nil {
+				key, value); err != nil {
 				respond(w, http.StatusInternalServerError, errResp("internal error"))
 				return
 			}
@@ -188,6 +228,17 @@ func handleSetSettings(db *sql.DB) http.HandlerFunc {
 	}
 }

+// adminTeam is a team as an administrator sees it: what it is, plus how big it
+// is and how much is on fire in it. One definition, so a team in the list and a
+// team on its own page cannot describe themselves differently.
+type adminTeam struct {
+	ID            int64     `json:"id"`
+	Name          string    `json:"name"`
+	CreatedAt     time.Time `json:"created_at"`
+	Members       int64     `json:"members"`
+	OpenIncidents int64     `json:"open_incidents"`
+}
+
 // handleAdminListTeams lists every team on the server, with its size. The
 // ordinary /api/teams answers "what am I in"; this one answers "what exists",
 // which only an administrator may ask.
@@ -206,13 +257,6 @@ func handleAdminListTeams(db *sql.DB) http.HandlerFunc {
 		}
 		defer rows.Close()

-		type adminTeam struct {
-			ID            int64     `json:"id"`
-			Name          string    `json:"name"`
-			CreatedAt     time.Time `json:"created_at"`
-			Members       int64     `json:"members"`
-			OpenIncidents int64     `json:"open_incidents"`
-		}
 		teams := []adminTeam{}
 		for rows.Next() {
 			var t adminTeam
@@ -232,6 +276,79 @@ func handleAdminListTeams(db *sql.DB) http.HandlerFunc {
 	}
 }

+// handleAdminGetTeam answers "what is this team, and who is in it" for any team
+// on the server, which is the one question an administrator could not ask.
+//
+// GET /api/teams/{id}/members is requireTeamMember and answers 404 to somebody
+// outside the team, administrator or not, and that stays exactly as it is:
+// member means membership and nothing else. Reading a team's shape is a
+// different thing from reading its work, so it gets an endpoint of its own
+// under AdminOnly rather than an exception carved into that rule. An
+// administrator still sees none of the team's incidents, alerts or rota.
+func handleAdminGetTeam(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		teamID, ok := teamParam(w, r)
+		if !ok {
+			return
+		}
+
+		var t adminTeam
+		var created int64
+		err := db.QueryRowContext(r.Context(), `
+			SELECT t.id, t.name, t.created_at,
+			       (SELECT COUNT(*) FROM team_members m WHERE m.team_id = t.id),
+			       (SELECT COUNT(*) FROM incidents i
+			         WHERE i.team_id = t.id AND i.resolved_at IS NULL)
+			FROM   teams t
+			WHERE  t.id = $1`, teamID).
+			Scan(&t.ID, &t.Name, &created, &t.Members, &t.OpenIncidents)
+		if errors.Is(err, sql.ErrNoRows) {
+			respond(w, http.StatusNotFound, errResp("not found"))
+			return
+		}
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		t.CreatedAt = time.Unix(created, 0).UTC()
+
+		// Same query and same ordering as handleListTeamMembers, so the two
+		// answers to "who is in this team" cannot disagree about the answer.
+		rows, err := db.QueryContext(r.Context(), `
+			SELECT m.team_id, m.user_id, u.username, m.role, m.joined_at
+			FROM   team_members m
+			JOIN   users u ON u.id = m.user_id
+			WHERE  m.team_id = $1
+			ORDER  BY u.username`, teamID)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		defer rows.Close()
+
+		members := []models.TeamMember{}
+		for rows.Next() {
+			var m models.TeamMember
+			var joined int64
+			if err := rows.Scan(&m.TeamID, &m.UserID, &m.Username, &m.Role, &joined); err != nil {
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+			m.JoinedAt = time.Unix(joined, 0).UTC()
+			members = append(members, m)
+		}
+		if err := rows.Err(); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+
+		// A wrapper rather than a team with the members hung off it: "members"
+		// already means a count on the list endpoint, and one name must not be
+		// a number in one answer and an array in the next.
+		respond(w, http.StatusOK, map[string]any{"team": t, "members": members})
+	}
+}
+
 // handleRenameTeam renames a team. An owner's job, and an administrator's when
 // a team has nobody left to do it.
 func handleRenameTeam(db *sql.DB) http.HandlerFunc {
@@ -247,7 +364,15 @@ func handleRenameTeam(db *sql.DB) http.HandlerFunc {
 		var req struct {
 			Name string `json:"name"`
 		}
-		if err := decodeJSON(r, &req); err != nil || req.Name == "" {
+		// Trimmed, as handleCreateTeam trims: without it " " is a team name
+		// here but not at creation, which is one rule stated twice and only
+		// half applied.
+		if err := decodeJSON(r, &req); err != nil {
+			respond(w, http.StatusBadRequest, errResp("name is required"))
+			return
+		}
+		req.Name = strings.TrimSpace(req.Name)
+		if req.Name == "" {
 			respond(w, http.StatusBadRequest, errResp("name is required"))
 			return
 		}
@@ -0,0 +1,489 @@
+package api
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"git.ryuvia.com/niklas/terdut-server/internal/models"
+	"github.com/go-chi/chi/v5"
+)
+
+// SettingSignupMode says who may create an account. It lives in the settings
+// table with the other behaviour settings, so an administrator changes it in
+// the admin page rather than in a chart.
+//
+// Two modes, not three. A domain-restricted mode was considered and dropped:
+// with no email in this server there is nothing to verify an address against,
+// so it would check the domain of a string somebody typed — a speed bump
+// dressed as a control.
+const (
+	SettingSignupMode = "signup_mode"
+
+	SignupInviteOnly = "invite_only"
+	SignupOpen       = "open"
+)
+
+// defaultSignupMode is invite-only. An install that gets a public hostname
+// before anybody has thought about sign-up should not be collecting accounts
+// from the internet by default.
+const defaultSignupMode = SignupInviteOnly
+
+// inviteTTL is how long a new invite link lives. Long enough to send it and be
+// read tomorrow, short enough that a link in an old chat log stops working.
+const inviteTTL = 7 * 24 * time.Hour
+
+// signupMode reads the current mode, falling back to invite-only for a missing
+// or unrecognised value: the failure mode of a typo in this setting should be
+// the closed door, not the open one.
+func signupMode(ctx context.Context, db *sql.DB) string {
+	var raw string
+	if err := db.QueryRowContext(ctx,
+		"SELECT value FROM settings WHERE key = $1", SettingSignupMode).Scan(&raw); err != nil {
+		return defaultSignupMode
+	}
+	if raw != SignupOpen && raw != SignupInviteOnly {
+		return defaultSignupMode
+	}
+	return raw
+}
+
+// handleSignupInfo tells the sign-up page what it may offer, without requiring
+// a session: whether open sign-up is on, and whether the invite in the URL is
+// any good. A bad invite is better reported before somebody picks a password.
+func handleSignupInfo(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		out := map[string]any{"mode": signupMode(r.Context(), db)}
+
+		if token := r.URL.Query().Get("invite"); token != "" {
+			inv, err := loadInvite(r.Context(), db, token)
+			switch {
+			case err == nil:
+				out["invite_valid"] = true
+				out["invite_team"] = inv.teamName
+			default:
+				// Deliberately one answer for expired, revoked, used up and
+				// never existed. Telling a stranger which it was tells them
+				// something about links they do not hold.
+				out["invite_valid"] = false
+			}
+		}
+		respond(w, http.StatusOK, out)
+	}
+}
+
+type invite struct {
+	id       int64
+	teamID   int64
+	teamName string
+	role     string
+}
+
+// loadInvite resolves a raw token to a usable invite, or an error. Usable means
+// it exists, has not been revoked, has not expired and has uses left.
+func loadInvite(ctx context.Context, q querier, token string) (invite, error) {
+	var inv invite
+	err := q.QueryRowContext(ctx, `
+		SELECT i.id, i.team_id, t.name, i.role
+		FROM   invites i
+		JOIN   teams t ON t.id = i.team_id
+		WHERE  i.token_hash = $1
+		  AND  i.revoked_at IS NULL
+		  AND  i.expires_at > `+nowEpoch+`
+		  AND  i.uses < i.max_uses`, hashToken(token)).
+		Scan(&inv.id, &inv.teamID, &inv.teamName, &inv.role)
+	if errors.Is(err, sql.ErrNoRows) {
+		return invite{}, errInviteUnusable
+	}
+	return inv, err
+}
+
+var errInviteUnusable = errors.New("invite is not usable")
+
+// handleSignup creates an account, and puts it somewhere.
+//
+// Rate-limited on the same limiter as login, by address: sign-up is the other
+// unauthenticated endpoint that writes, and an open install without this is a
+// way to fill somebody's user table.
+func handleSignup(db *sql.DB, limiter *loginLimiter, publicURL string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		addr := clientAddr(r)
+		if limiter.blocked("signup:"+addr, maxSignupsPerAddr) {
+			respond(w, http.StatusTooManyRequests, errResp("too many sign-ups from this address"))
+			return
+		}
+
+		var req struct {
+			Username string `json:"username"`
+			Email    string `json:"email"`
+			Password string `json:"password"`
+			Invite   string `json:"invite"`
+			TeamName string `json:"team_name"`
+		}
+		if err := decodeJSON(r, &req); err != nil {
+			respond(w, http.StatusBadRequest, errResp("invalid request body"))
+			return
+		}
+		req.Username = strings.TrimSpace(req.Username)
+		req.Email = strings.TrimSpace(req.Email)
+		req.TeamName = strings.TrimSpace(req.TeamName)
+
+		if req.Username == "" || req.Email == "" {
+			respond(w, http.StatusBadRequest, errResp("username and email are required"))
+			return
+		}
+		if msg := validatePassword(req.Password); msg != "" {
+			respond(w, http.StatusBadRequest, errResp(msg))
+			return
+		}
+
+		mode := signupMode(r.Context(), db)
+		var inv invite
+		hasInvite := false
+		if req.Invite != "" {
+			var err error
+			inv, err = loadInvite(r.Context(), db, req.Invite)
+			if err != nil {
+				limiter.fail("signup:" + addr)
+				respond(w, http.StatusForbidden, errResp("this invite link is not usable"))
+				return
+			}
+			hasInvite = true
+		}
+		if !hasInvite && mode != SignupOpen {
+			// No invite and the door is shut. Not 404: the endpoint exists and
+			// saying so is how somebody knows to ask for a link.
+			respond(w, http.StatusForbidden,
+				errResp("sign-up is invite-only on this server"))
+			return
+		}
+		if !hasInvite && req.TeamName == "" {
+			// Open sign-up with no team would create an account that sees an
+			// empty queue and can be paged by nobody.
+			respond(w, http.StatusBadRequest, errResp("team_name is required"))
+			return
+		}
+
+		hash, err := hashPassword(req.Password)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+
+		tx, err := db.BeginTx(r.Context(), nil)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		defer tx.Rollback() //nolint:errcheck
+
+		var userID int64
+		var invitedVia *int64
+		if hasInvite {
+			invitedVia = &inv.id
+		}
+		if err := tx.QueryRowContext(r.Context(), `
+			INSERT INTO users (username, email, password_hash, invited_via)
+			VALUES ($1, $2, $3, $4) RETURNING id`,
+			req.Username, req.Email, hash, invitedVia).Scan(&userID); err != nil {
+			if isUniqueViolation(err) {
+				respond(w, http.StatusConflict, errResp("username or email already exists"))
+				return
+			}
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+
+		teamID, role := inv.teamID, inv.role
+		if !hasInvite {
+			// Open sign-up makes a team, and its creator owns it.
+			if err := tx.QueryRowContext(r.Context(),
+				"INSERT INTO teams (name) VALUES ($1) RETURNING id", req.TeamName).Scan(&teamID); err != nil {
+				if isUniqueViolation(err) {
+					respond(w, http.StatusConflict, errResp("a team with that name already exists"))
+					return
+				}
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+			role = models.RoleOwner
+		}
+
+		if _, err := tx.ExecContext(r.Context(),
+			"INSERT INTO team_members (team_id, user_id, role) VALUES ($1, $2, $3)",
+			teamID, userID, role); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+
+		if hasInvite {
+			// Counted inside the transaction, so two people redeeming the last
+			// use of a link at once cannot both get in.
+			res, err := tx.ExecContext(r.Context(),
+				"UPDATE invites SET uses = uses + 1 WHERE id = $1 AND uses < max_uses", inv.id)
+			if err != nil {
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+			if n, _ := res.RowsAffected(); n == 0 {
+				respond(w, http.StatusForbidden, errResp("this invite link is not usable"))
+				return
+			}
+		}
+
+		if err := tx.Commit(); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+
+		// Signed in immediately: the alternative is a form that says "now go
+		// and log in", which is the same credential typed twice.
+		if err := startSession(w, r, db, userID, publicURL); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		user, _ := fetchUser(r.Context(), db, userID)
+		respond(w, http.StatusCreated, meResponse{User: user, HasPassword: true})
+	}
+}
+
+// maxSignupsPerAddr is looser than the login limit: several people joining from
+// one office share an address, and the thing being limited is account creation
+// rather than password guessing.
+const maxSignupsPerAddr = 10
+
+// ---------------------------------------------------------------------------
+// Invites
+// ---------------------------------------------------------------------------
+
+type inviteJSON struct {
+	ID        int64     `json:"id"`
+	TeamID    int64     `json:"team_id"`
+	Role      string    `json:"role"`
+	CreatedAt time.Time `json:"created_at"`
+	ExpiresAt time.Time `json:"expires_at"`
+	MaxUses   int64     `json:"max_uses"`
+	Uses      int64     `json:"uses"`
+	Revoked   bool      `json:"revoked"`
+
+	// URL is the whole link, returned once when the invite is created. Like an
+	// integration key, only its hash is stored.
+	URL string `json:"url,omitempty"`
+}
+
+func handleListInvites(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		teamID, ok := teamParam(w, r)
+		if !ok {
+			return
+		}
+		if !requireTeamOwner(w, r, teamID) {
+			return
+		}
+
+		rows, err := db.QueryContext(r.Context(), `
+			SELECT id, team_id, role, created_at, expires_at, max_uses, uses, revoked_at
+			FROM   invites
+			WHERE  team_id = $1
+			ORDER  BY id DESC`, teamID)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		defer rows.Close()
+
+		out := []inviteJSON{}
+		for rows.Next() {
+			var i inviteJSON
+			var created, expires int64
+			var revoked *int64
+			if err := rows.Scan(&i.ID, &i.TeamID, &i.Role, &created, &expires,
+				&i.MaxUses, &i.Uses, &revoked); err != nil {
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+			i.CreatedAt = time.Unix(created, 0).UTC()
+			i.ExpiresAt = time.Unix(expires, 0).UTC()
+			i.Revoked = revoked != nil
+			out = append(out, i)
+		}
+		if err := rows.Err(); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		respond(w, http.StatusOK, out)
+	}
+}
+
+// handleCreateInvite mints a link into this team. Owner-only, like the rest of
+// a team's configuration: deciding who joins is configuring the team.
+func handleCreateInvite(db *sql.DB, publicURL string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		teamID, ok := teamParam(w, r)
+		if !ok {
+			return
+		}
+		if !requireTeamOwner(w, r, teamID) {
+			return
+		}
+
+		var req struct {
+			Role    string `json:"role"`
+			MaxUses int64  `json:"max_uses"`
+		}
+		if err := decodeJSON(r, &req); err != nil {
+			respond(w, http.StatusBadRequest, errResp("invalid request body"))
+			return
+		}
+		if req.Role == "" {
+			req.Role = models.RoleMember
+		}
+		if req.Role != models.RoleOwner && req.Role != models.RoleMember {
+			respond(w, http.StatusBadRequest, errResp("role must be owner or member"))
+			return
+		}
+		if req.MaxUses == 0 {
+			req.MaxUses = 1
+		}
+		if req.MaxUses < 1 || req.MaxUses > 100 {
+			respond(w, http.StatusBadRequest, errResp("max_uses must be between 1 and 100"))
+			return
+		}
+
+		raw, hash, err := randomToken()
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		caller, _ := userFromContext(r.Context())
+		expires := time.Now().Add(inviteTTL)
+
+		var out inviteJSON
+		var created, expiresAt int64
+		if err := db.QueryRowContext(r.Context(), `
+			INSERT INTO invites (token_hash, team_id, role, created_by, expires_at, max_uses)
+			VALUES ($1, $2, $3, $4, $5, $6)
+			RETURNING id, team_id, role, created_at, expires_at, max_uses, uses`,
+			hash, teamID, req.Role, caller.ID, expires.Unix(), req.MaxUses).
+			Scan(&out.ID, &out.TeamID, &out.Role, &created, &expiresAt, &out.MaxUses, &out.Uses); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		out.CreatedAt = time.Unix(created, 0).UTC()
+		out.ExpiresAt = time.Unix(expiresAt, 0).UTC()
+		out.URL = strings.TrimSuffix(publicURL, "/") + "/signup?invite=" + raw
+		respond(w, http.StatusCreated, out)
+	}
+}
+
+// handleRevokeInvite stops a link working without waiting for it to expire.
+func handleRevokeInvite(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		teamID, ok := teamParam(w, r)
+		if !ok {
+			return
+		}
+		if !requireTeamOwner(w, r, teamID) {
+			return
+		}
+		id, err := strconv.ParseInt(chi.URLParam(r, "inviteID"), 10, 64)
+		if err != nil {
+			respond(w, http.StatusBadRequest, errResp("invalid invite id"))
+			return
+		}
+
+		res, err := db.ExecContext(r.Context(),
+			"UPDATE invites SET revoked_at = "+nowEpoch+
+				" WHERE id = $1 AND team_id = $2 AND revoked_at IS NULL", id, teamID)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		if n, _ := res.RowsAffected(); n == 0 {
+			respond(w, http.StatusNotFound, errResp("not found"))
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}
+}
+
+// ---------------------------------------------------------------------------
+// Onboarding
+// ---------------------------------------------------------------------------
+
+// handleTestNotification publishes one push to the caller's own topic.
+//
+// The point of the first-run checklist's notification step is not that a topic
+// string has been typed but that a phone buzzes, and only the person holding it
+// can tell whether it did. Published directly rather than through the outbox:
+// the outbox row requires an incident, and this deliberately belongs to no
+// incident.
+func handleTestNotification(cfg NotifyConfig, db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if cfg.BaseURL == "" {
+			respond(w, http.StatusServiceUnavailable,
+				errResp("this server has no ntfy configured, so it can send nothing"))
+			return
+		}
+		caller, _ := userFromContext(r.Context())
+
+		var topic *string
+		if err := db.QueryRowContext(r.Context(),
+			"SELECT ntfy_topic FROM users WHERE id = $1", caller.ID).Scan(&topic); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		if topic == nil || *topic == "" {
+			respond(w, http.StatusBadRequest, errResp("set a notification topic first"))
+			return
+		}
+
+		if err := publish(r.Context(), cfg, ntfyMessage{
+			Topic:   *topic,
+			Title:   "terdut test",
+			Message: "If this arrived, your notifications work.",
+			Tags:    []string{"white_check_mark"},
+		}); err != nil {
+			// The failure is the useful part here: a wrong topic, a token the
+			// ntfy server rejects, or an ntfy that is down all look the same
+			// from the phone, which is silence.
+			respond(w, http.StatusBadGateway, errResp("ntfy rejected the test: "+err.Error()))
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}
+}
+
+// handleDismissOnboarding hides the first-run checklist, or brings it back.
+// Stored per user rather than in the browser: somebody who finishes setting up
+// on a laptop should not be nagged again on their phone.
+func handleDismissOnboarding(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var req struct {
+			Dismissed *bool `json:"dismissed"`
+		}
+		if err := decodeJSON(r, &req); err != nil || req.Dismissed == nil {
+			respond(w, http.StatusBadRequest, errResp("dismissed is required"))
+			return
+		}
+		caller, _ := userFromContext(r.Context())
+
+		var err error
+		if *req.Dismissed {
+			_, err = db.ExecContext(r.Context(),
+				"UPDATE users SET onboarding_dismissed_at = "+nowEpoch+" WHERE id = $1", caller.ID)
+		} else {
+			_, err = db.ExecContext(r.Context(),
+				"UPDATE users SET onboarding_dismissed_at = NULL WHERE id = $1", caller.ID)
+		}
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}
+}
@@ -0,0 +1,270 @@
+package api_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/cookiejar"
+	"testing"
+)
+
+// signup posts to the unauthenticated sign-up endpoint, the way the form does,
+// and returns the response and a client holding whatever cookie came back.
+func signup(t *testing.T, s *ts, body map[string]any) (*http.Response, *http.Client) {
+	t.Helper()
+	data, _ := json.Marshal(body)
+	jar, _ := cookiejar.New(nil)
+	client := &http.Client{Jar: jar}
+	req, _ := http.NewRequest(http.MethodPost, s.URL+"/api/signup", bytes.NewReader(data))
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := client.Do(req)
+	if err != nil {
+		t.Fatalf("signup: %v", err)
+	}
+	return resp, client
+}
+
+// invite mints a link into the default team and returns its raw token.
+func invite(t *testing.T, s *ts, role string, maxUses int64) string {
+	t.Helper()
+	var out struct {
+		URL string `json:"url"`
+	}
+	decode(t, s.req(t, http.MethodPost, "/api/teams/"+defaultTeam+"/invites",
+		map[string]any{"role": role, "max_uses": maxUses}), &out)
+	if out.URL == "" {
+		t.Fatal("no invite URL returned")
+	}
+	// ...?invite=<token>
+	i := len(out.URL) - 1
+	for ; i >= 0 && out.URL[i] != '='; i-- {
+	}
+	return out.URL[i+1:]
+}
+
+func setSignupMode(t *testing.T, s *ts, mode string) {
+	t.Helper()
+	resp := s.req(t, http.MethodPut, "/api/admin/settings", map[string]any{"signup_mode": mode})
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("set signup mode: %d", resp.StatusCode)
+	}
+}
+
+// The default is the closed door. An install that gets a public hostname before
+// anybody has thought about sign-up should not be collecting accounts.
+func TestSignup_InviteOnlyByDefault(t *testing.T) {
+	s := newTS(t)
+
+	var info map[string]any
+	decode(t, s.req(t, http.MethodGet, "/api/signup", nil), &info)
+	if info["mode"] != "invite_only" {
+		t.Errorf("default sign-up mode is %v, want invite_only", info["mode"])
+	}
+
+	resp, _ := signup(t, s, map[string]any{
+		"username": "stranger", "email": "s@test.com", "password": "correct-horse-battery",
+	})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Errorf("sign-up without an invite: expected 403, got %d", resp.StatusCode)
+	}
+}
+
+// An invite carries the team and the role, so redeeming one lands somewhere
+// usable rather than in an account that sees an empty queue.
+func TestSignup_InviteCreatesAMemberOfThatTeam(t *testing.T) {
+	s := newTS(t)
+	token := invite(t, s, "member", 1)
+
+	// The form checks the link before asking for a password.
+	var info map[string]any
+	decode(t, s.req(t, http.MethodGet, "/api/signup?invite="+token, nil), &info)
+	if info["invite_valid"] != true {
+		t.Fatalf("a fresh invite should be valid: %v", info)
+	}
+	if info["invite_team"] != "Default" {
+		t.Errorf("the form should name the team: %v", info["invite_team"])
+	}
+
+	resp, client := signup(t, s, map[string]any{
+		"username": "newcomer", "email": "n@test.com",
+		"password": "correct-horse-battery", "invite": token,
+	})
+	if resp.StatusCode != http.StatusCreated {
+		t.Fatalf("redeeming an invite: %d", resp.StatusCode)
+	}
+	var me struct {
+		User struct {
+			ID      int64 `json:"id"`
+			IsAdmin bool  `json:"is_admin"`
+		} `json:"user"`
+	}
+	decode(t, resp, &me)
+	if me.User.IsAdmin {
+		t.Error("somebody who signs up must not be an administrator")
+	}
+
+	// Signed in already: the cookie came back with the response.
+	got, err := client.Get(s.URL + "/api/teams")
+	if err != nil {
+		t.Fatal(err)
+	}
+	teams := list(t, got)
+	if len(teams) != 1 || teams[0]["name"] != "Default" || teams[0]["role"] != "member" {
+		t.Errorf("expected membership of Default as member, got %v", teams)
+	}
+}
+
+// A single-use link is single-use, and the check is inside the transaction so
+// two people redeeming the last use at once cannot both get in.
+func TestSignup_InviteCannotBeUsedTwice(t *testing.T) {
+	s := newTS(t)
+	token := invite(t, s, "member", 1)
+
+	first, _ := signup(t, s, map[string]any{
+		"username": "first", "email": "f@test.com",
+		"password": "correct-horse-battery", "invite": token,
+	})
+	first.Body.Close()
+	if first.StatusCode != http.StatusCreated {
+		t.Fatalf("first redemption: %d", first.StatusCode)
+	}
+
+	second, _ := signup(t, s, map[string]any{
+		"username": "second", "email": "s@test.com",
+		"password": "correct-horse-battery", "invite": token,
+	})
+	second.Body.Close()
+	if second.StatusCode != http.StatusForbidden {
+		t.Errorf("second redemption: expected 403, got %d", second.StatusCode)
+	}
+
+	// And the link reports itself unusable before anybody types a password.
+	var info map[string]any
+	decode(t, s.req(t, http.MethodGet, "/api/signup?invite="+token, nil), &info)
+	if info["invite_valid"] != false {
+		t.Error("a used-up invite should report itself invalid")
+	}
+}
+
+// Revoking stops a link without waiting for it to expire.
+func TestSignup_RevokedInviteStopsWorking(t *testing.T) {
+	s := newTS(t)
+	token := invite(t, s, "member", 5)
+
+	invites := list(t, s.req(t, http.MethodGet, "/api/teams/"+defaultTeam+"/invites", nil))
+	if len(invites) != 1 {
+		t.Fatalf("expected one invite, got %d", len(invites))
+	}
+	id := int64(invites[0]["id"].(float64))
+
+	resp := s.req(t, http.MethodDelete, "/api/teams/"+defaultTeam+"/invites/"+id64(id), nil)
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("revoke: %d", resp.StatusCode)
+	}
+
+	used, _ := signup(t, s, map[string]any{
+		"username": "late", "email": "l@test.com",
+		"password": "correct-horse-battery", "invite": token,
+	})
+	used.Body.Close()
+	if used.StatusCode != http.StatusForbidden {
+		t.Errorf("a revoked invite: expected 403, got %d", used.StatusCode)
+	}
+}
+
+// Open sign-up makes a team, because an account in no team sees an empty queue
+// and can be paged by nobody.
+func TestSignup_OpenModeMakesATeam(t *testing.T) {
+	s := newTS(t)
+	setSignupMode(t, s, "open")
+
+	missing, _ := signup(t, s, map[string]any{
+		"username": "solo", "email": "s@test.com", "password": "correct-horse-battery",
+	})
+	missing.Body.Close()
+	if missing.StatusCode != http.StatusBadRequest {
+		t.Errorf("open sign-up with no team name: expected 400, got %d", missing.StatusCode)
+	}
+
+	resp, client := signup(t, s, map[string]any{
+		"username": "solo", "email": "s@test.com",
+		"password": "correct-horse-battery", "team_name": "Solo",
+	})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusCreated {
+		t.Fatalf("open sign-up: %d", resp.StatusCode)
+	}
+
+	got, err := client.Get(s.URL + "/api/teams")
+	if err != nil {
+		t.Fatal(err)
+	}
+	teams := list(t, got)
+	if len(teams) != 1 || teams[0]["name"] != "Solo" || teams[0]["role"] != "owner" {
+		t.Errorf("the creator should own their new team, got %v", teams)
+	}
+}
+
+// Switching the mode is an administrator's decision, and it takes effect at
+// once rather than at the next restart.
+func TestSignup_ModeIsAnAdminSetting(t *testing.T) {
+	s := newTS(t)
+	_, call := member(t, s, "plain")
+
+	resp := call(http.MethodPut, "/api/admin/settings", map[string]any{"signup_mode": "open"})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Errorf("a member changing the mode: expected 403, got %d", resp.StatusCode)
+	}
+
+	bad := s.req(t, http.MethodPut, "/api/admin/settings", map[string]any{"signup_mode": "everybody"})
+	bad.Body.Close()
+	if bad.StatusCode != http.StatusBadRequest {
+		t.Errorf("an unknown mode: expected 400, got %d", bad.StatusCode)
+	}
+
+	setSignupMode(t, s, "open")
+	var info map[string]any
+	decode(t, s.req(t, http.MethodGet, "/api/signup", nil), &info)
+	if info["mode"] != "open" {
+		t.Errorf("the change should be visible at once, got %v", info["mode"])
+	}
+}
+
+// Minting a link is configuring the team, so it is an owner's job.
+func TestSignup_InvitesAreOwnerOnly(t *testing.T) {
+	s := newTS(t)
+	_, call := member(t, s, "plain")
+
+	resp := call(http.MethodPost, "/api/teams/"+defaultTeam+"/invites", map[string]any{"role": "member"})
+	resp.Body.Close()
+	if resp.StatusCode != http.StatusForbidden {
+		t.Errorf("a member minting an invite: expected 403, got %d", resp.StatusCode)
+	}
+}
+
+// A password still has to be a password, and a taken username is still taken.
+func TestSignup_ValidatesLikeTheRestOfTheServer(t *testing.T) {
+	s := newTS(t)
+	token := invite(t, s, "member", 5)
+
+	short, _ := signup(t, s, map[string]any{
+		"username": "shorty", "email": "sh@test.com", "password": "abc", "invite": token,
+	})
+	short.Body.Close()
+	if short.StatusCode != http.StatusBadRequest {
+		t.Errorf("a short password: expected 400, got %d", short.StatusCode)
+	}
+
+	taken, _ := signup(t, s, map[string]any{
+		"username": "admin", "email": "other@test.com",
+		"password": "correct-horse-battery", "invite": token,
+	})
+	taken.Body.Close()
+	if taken.StatusCode != http.StatusConflict {
+		t.Errorf("an existing username: expected 409, got %d", taken.StatusCode)
+	}
+}
@@ -0,0 +1,113 @@
+package api
+
+import (
+	"context"
+	"database/sql"
+	"net/http"
+	"strconv"
+	"time"
+
+	"git.ryuvia.com/niklas/terdut-server/internal/models"
+)
+
+const (
+	similarDefaultLimit = 5
+	similarMaxLimit     = 20
+)
+
+// handleIncidentSimilar lists earlier, resolved incidents in the same team with
+// the same signature that someone left notes on, incidents with a resolution
+// note first. This is the "have we seen this before" answer for a responder
+// looking at a fresh incident; the plain notes are one timeline fetch away.
+func handleIncidentSimilar(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id, ok := incidentIDParam(w, r, db)
+		if !ok {
+			return
+		}
+		limit := similarDefaultLimit
+		if v := r.URL.Query().Get("limit"); v != "" {
+			n, err := strconv.Atoi(v)
+			if err != nil || n < 1 {
+				respond(w, http.StatusBadRequest, errResp("invalid limit"))
+				return
+			}
+			limit = min(n, similarMaxLimit)
+		}
+
+		out, err := similarIncidents(r.Context(), db, id, limit)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		respond(w, http.StatusOK, out)
+	}
+}
+
+func similarIncidents(ctx context.Context, q querier, id int64, limit int) ([]models.SimilarIncident, error) {
+	rows, err := q.QueryContext(ctx, `
+		SELECT o.id, o.title, o.triggered_at, o.resolved_at,
+		       (SELECT COUNT(*) FROM incident_events e
+		         WHERE e.incident_id = o.id AND e.type = $3)
+		FROM   incidents i
+		JOIN   incidents o ON o.team_id = i.team_id AND o.signature = i.signature
+		WHERE  i.id = $1 AND o.id <> i.id AND o.resolved_at IS NOT NULL
+		  AND  EXISTS (SELECT 1 FROM incident_events e
+		                WHERE e.incident_id = o.id AND e.type IN ($3, $4))
+		ORDER  BY EXISTS (SELECT 1 FROM incident_events e
+		                   WHERE e.incident_id = o.id AND e.type = $4) DESC,
+		          o.triggered_at DESC
+		LIMIT  $2`, id, limit, evNote, evResolutionNote)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := []models.SimilarIncident{}
+	ids := []int64{}
+	for rows.Next() {
+		var s models.SimilarIncident
+		var triggered, resolved int64
+		if err := rows.Scan(&s.ID, &s.Title, &triggered, &resolved, &s.NoteCount); err != nil {
+			return nil, err
+		}
+		s.TriggeredAt = time.Unix(triggered, 0).UTC()
+		s.ResolvedAt = time.Unix(resolved, 0).UTC()
+		s.ResolutionNotes = []models.IncidentEvent{}
+		out = append(out, s)
+		ids = append(ids, s.ID)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	if len(out) == 0 {
+		return out, nil
+	}
+
+	nrows, err := q.QueryContext(ctx, `
+		SELECT e.id, e.incident_id, e.type, e.user_id, u.username, e.detail, e.created_at
+		FROM   incident_events e
+		LEFT   JOIN users u ON u.id = e.user_id
+		WHERE  e.incident_id = ANY($1) AND e.type = $2
+		ORDER  BY e.created_at, e.id`, ids, evResolutionNote)
+	if err != nil {
+		return nil, err
+	}
+	defer nrows.Close()
+
+	byID := make(map[int64]*models.SimilarIncident, len(out))
+	for i := range out {
+		byID[out[i].ID] = &out[i]
+	}
+	for nrows.Next() {
+		var e models.IncidentEvent
+		var ts int64
+		if err := nrows.Scan(&e.ID, &e.IncidentID, &e.Type, &e.UserID, &e.Username, &e.Detail, &ts); err != nil {
+			return nil, err
+		}
+		e.CreatedAt = time.Unix(ts, 0).UTC()
+		s := byID[e.IncidentID]
+		s.ResolutionNotes = append(s.ResolutionNotes, e)
+	}
+	return out, nrows.Err()
+}
@@ -0,0 +1,99 @@
+package api_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"testing"
+)
+
+// postGrouped posts a firing webhook whose group labels are exactly the given
+// map, unlike postWebhook, which only ever groups by alertname.
+func postGrouped(t *testing.T, s *ts, fingerprint, startsAt string, groupLabels map[string]string) {
+	t.Helper()
+	labels := map[string]string{}
+	for k, v := range groupLabels {
+		labels[k] = v
+	}
+	payload := map[string]any{
+		"version": "4", "status": "firing",
+		"groupKey":    fingerprint,
+		"groupLabels": groupLabels,
+		"alerts": []map[string]any{
+			amAlert(fingerprint, groupLabels["alertname"], "firing", startsAt, zeroTime, labels),
+		},
+	}
+	data, _ := json.Marshal(payload)
+	resp, err := http.Post(s.URL+"/api/integrations/"+s.ingestKey+"/alertmanager",
+		"application/json", bytes.NewReader(data))
+	if err != nil {
+		t.Fatalf("post webhook: %v", err)
+	}
+	resp.Body.Close()
+}
+
+func similar(t *testing.T, s *ts, id int) []map[string]any {
+	t.Helper()
+	var out []map[string]any
+	decode(t, s.req(t, http.MethodGet, "/api/incidents/"+strconv.Itoa(id)+"/similar", nil), &out)
+	return out
+}
+
+// Same alert on another instance is the same problem; a resolution note left on
+// the first one is what the second one should be shown.
+func TestSimilar_IgnoresVolatileLabelsAndLeadsWithResolutionNote(t *testing.T) {
+	s := newTS(t)
+	postGrouped(t, s, "fp-a", "2026-05-20T10:00:00Z",
+		map[string]string{"alertname": "DiskFull", "instance": "web-1", "job": "node"})
+	s.req(t, http.MethodPost, "/api/incidents/1/resolve",
+		map[string]string{"resolution": "rotated the logs"}).Body.Close()
+
+	postGrouped(t, s, "fp-b", "2026-05-21T10:00:00Z",
+		map[string]string{"alertname": "DiskFull", "instance": "web-2", "job": "node"})
+
+	got := similar(t, s, 2)
+	if len(got) != 1 || int(got[0]["id"].(float64)) != 1 {
+		t.Fatalf("expected incident 1 as the only similar one, got %v", got)
+	}
+	notes := got[0]["resolution_notes"].([]any)
+	if len(notes) != 1 || notes[0].(map[string]any)["detail"] != "rotated the logs" {
+		t.Fatalf("expected the resolution note, got %v", notes)
+	}
+}
+
+// A different stable label (job) is a different problem, and an incident nobody
+// wrote a note on has nothing to show.
+func TestSimilar_DifferentSignatureOrNoNotesIsExcluded(t *testing.T) {
+	s := newTS(t)
+	postGrouped(t, s, "fp-1", "2026-05-20T10:00:00Z",
+		map[string]string{"alertname": "DiskFull", "job": "node"})
+	s.req(t, http.MethodPost, "/api/incidents/1/notes", map[string]string{"content": "checked"}).Body.Close()
+	s.req(t, http.MethodPost, "/api/incidents/1/resolve", nil).Body.Close()
+
+	postGrouped(t, s, "fp-2", "2026-05-20T11:00:00Z",
+		map[string]string{"alertname": "DiskFull", "job": "db"})
+	s.req(t, http.MethodPost, "/api/incidents/2/resolve", nil).Body.Close()
+
+	postGrouped(t, s, "fp-3", "2026-05-21T10:00:00Z",
+		map[string]string{"alertname": "DiskFull", "job": "db"})
+
+	// Incident 3 matches 2 by signature, but 2 has no notes.
+	if got := similar(t, s, 3); len(got) != 0 {
+		t.Fatalf("expected nothing similar to incident 3, got %v", got)
+	}
+}
+
+// An open incident is not "earlier experience" yet, and the incident itself is
+// never its own match.
+func TestSimilar_OpenIncidentsAreNotListed(t *testing.T) {
+	s := newTS(t)
+	postGrouped(t, s, "fp-o1", "2026-05-20T10:00:00Z", map[string]string{"alertname": "Flap"})
+	s.req(t, http.MethodPost, "/api/incidents/1/notes",
+		map[string]any{"content": "still open", "pinned": true}).Body.Close()
+	postGrouped(t, s, "fp-o2", "2026-05-21T10:00:00Z", map[string]string{"alertname": "Flap"})
+
+	if got := similar(t, s, 2); len(got) != 0 {
+		t.Fatalf("expected an open incident not to be listed, got %v", got)
+	}
+}
@@ -51,6 +51,68 @@ func handleListTeams(db *sql.DB) http.HandlerFunc {
 	}
 }

+// handleUserTeams lists one user's teams, for the admin page's per-user view:
+// "what is this person in", which /api/teams cannot answer because it is always
+// about the caller.
+//
+// Self or admin, matching the other per-user endpoints. It says which teams
+// somebody belongs to and in what role — not anything those teams own, so it
+// stays on the accounts side of the line the administrator flag draws.
+func handleUserTeams(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+		if err != nil {
+			respond(w, http.StatusBadRequest, errResp("invalid user id"))
+			return
+		}
+		if !requireSelfOrAdmin(w, r, id) {
+			return
+		}
+
+		// A user with no teams and a user who does not exist both list nothing,
+		// so the existence check is what tells them apart.
+		var exists bool
+		if err := db.QueryRowContext(r.Context(),
+			"SELECT EXISTS (SELECT 1 FROM users WHERE id = $1)", id).Scan(&exists); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		if !exists {
+			respond(w, http.StatusNotFound, errResp("user not found"))
+			return
+		}
+
+		rows, err := db.QueryContext(r.Context(), `
+			SELECT t.id, t.name, t.created_at, m.role
+			FROM   teams t
+			JOIN   team_members m ON m.team_id = t.id
+			WHERE  m.user_id = $1
+			ORDER  BY t.name`, id)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		defer rows.Close()
+
+		teams := []models.Team{}
+		for rows.Next() {
+			var t models.Team
+			var created int64
+			if err := rows.Scan(&t.ID, &t.Name, &created, &t.Role); err != nil {
+				respond(w, http.StatusInternalServerError, errResp("internal error"))
+				return
+			}
+			t.CreatedAt = time.Unix(created, 0).UTC()
+			teams = append(teams, t)
+		}
+		if err := rows.Err(); err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		respond(w, http.StatusOK, teams)
+	}
+}
+
 // handleCreateTeam creates a team and makes its creator the first owner. A team
 // with no owner would need an administrator to repair before anybody could use
 // it, so the two happen in one transaction.
@@ -477,17 +539,24 @@ func defaultTeamID(ctx context.Context, db *sql.DB) (int64, error) {
 // A team's dead man's switches
 // ---------------------------------------------------------------------------

-// deadmanResponse is the wire shape of a team's switch configuration. The
-// timeout is seconds rather than a duration string, because that is what the
-// column holds and what arithmetic is done on; a client renders it.
-type deadmanResponse struct {
-	TeamID         int64  `json:"team_id"`
-	Matchers       string `json:"matchers"`
+// deadmanSwitchRequest is what creating a switch takes. The timeout is seconds,
+// because that is what the column holds and what arithmetic is done on; a client
+// renders it.
+type deadmanSwitchRequest struct {
+	Name           string `json:"name"`
+	Matcher        string `json:"matcher"`
 	TimeoutSeconds int64  `json:"timeout_seconds"`
 	Severity       string `json:"severity"`
 }

-func handleGetTeamDeadman(db *sql.DB) http.HandlerFunc {
+// deadmanSeverities are the severities an incident can open at.
+var deadmanSeverities = map[string]bool{"critical": true, "error": true, "warning": true, "info": true}
+
+// handleListTeamDeadman lists a team's switches with what each one's heartbeats
+// are doing. A team with none gets an empty list, which is a configuration and
+// not an absence: answering 404 would make "off" indistinguishable from "this
+// server does not do this".
+func handleListTeamDeadman(db *sql.DB) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		teamID, ok := teamParam(w, r)
 		if !ok {
@@ -497,27 +566,26 @@ func handleGetTeamDeadman(db *sql.DB) http.HandlerFunc {
 			return
 		}

-		out := deadmanResponse{TeamID: teamID, Severity: "critical"}
-		err := db.QueryRowContext(r.Context(),
-			"SELECT matchers, timeout_seconds, severity FROM deadman_configs WHERE team_id = $1",
-			teamID).Scan(&out.Matchers, &out.TimeoutSeconds, &out.Severity)
-		if err != nil && !errors.Is(err, sql.ErrNoRows) {
+		set, err := deadmanSetForTeam(r.Context(), db, teamID)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		out, err := deadmanStatuses(r.Context(), db, teamID, set, time.Now())
+		if err != nil {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
 		}
-		// A team with no row watches nothing, which is a configuration and not
-		// an absence: answering 404 would make "off" indistinguishable from
-		// "this server does not do this".
 		respond(w, http.StatusOK, out)
 	}
 }

-// handleSetTeamDeadman replaces a team's switch configuration.
+// handleCreateTeamDeadman adds one switch.
 //
-// Validated by parsing: a matcher string that survives ParseDeadmanConfig with
-// nothing usable in it is rejected rather than stored, because a switch that
-// silently watches nothing is the failure this feature exists to prevent.
-func handleSetTeamDeadman(db *sql.DB) http.HandlerFunc {
+// Validated by parsing: a matcher with no alertname is rejected rather than
+// stored, because a switch that silently watches nothing is the failure this
+// feature exists to prevent.
+func handleCreateTeamDeadman(db *sql.DB) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		teamID, ok := teamParam(w, r)
 		if !ok {
@@ -527,50 +595,87 @@ func handleSetTeamDeadman(db *sql.DB) http.HandlerFunc {
 			return
 		}

-		var req struct {
-			Matchers       string `json:"matchers"`
-			TimeoutSeconds int64  `json:"timeout_seconds"`
-			Severity       string `json:"severity"`
-		}
+		var req deadmanSwitchRequest
 		if err := decodeJSON(r, &req); err != nil {
 			respond(w, http.StatusBadRequest, errResp("invalid request body"))
 			return
 		}
-		req.Matchers = strings.TrimSpace(req.Matchers)
+		req.Matcher = strings.TrimSpace(req.Matcher)
+		req.Name = strings.TrimSpace(req.Name)
 		if req.Severity == "" {
 			req.Severity = "critical"
 		}
-		if req.TimeoutSeconds < 0 {
-			respond(w, http.StatusBadRequest, errResp("timeout_seconds must not be negative"))
+		if !deadmanSeverities[req.Severity] {
+			respond(w, http.StatusBadRequest, errResp("severity must be critical, error, warning or info"))
 			return
 		}
-		if req.Matchers != "" {
-			parsed := parseDeadmanQuietly(req.Matchers, time.Duration(req.TimeoutSeconds)*time.Second, req.Severity)
-			if len(parsed.Matchers) == 0 {
-				respond(w, http.StatusBadRequest, errResp(
-					"no usable matchers: each must name an alertname, as in alertname=Watchdog,cluster=prod"))
-				return
-			}
+		if req.TimeoutSeconds <= 0 {
+			respond(w, http.StatusBadRequest, errResp("timeout_seconds must be positive"))
+			return
+		}
+		if strings.Contains(req.Matcher, ";") {
+			respond(w, http.StatusBadRequest, errResp("one matcher per switch: add another switch instead of separating with ;"))
+			return
+		}
+		m, err := parseDeadmanMatcher(req.Matcher)
+		if err != nil {
+			respond(w, http.StatusBadRequest, errResp(
+				"unusable matcher ("+err.Error()+"): each must name an alertname, as in alertname=Watchdog,cluster=prod"))
+			return
+		}
+		if req.Name == "" {
+			req.Name = m.config()
+		}
+		if len(req.Name) > 100 {
+			respond(w, http.StatusBadRequest, errResp("name is too long"))
+			return
 		}

-		if _, err := db.ExecContext(r.Context(), `
-			INSERT INTO deadman_configs (team_id, matchers, timeout_seconds, severity, updated_at)
-			VALUES ($1, $2, $3, $4, `+nowEpoch+`)
-			ON CONFLICT (team_id) DO UPDATE SET
-				matchers        = excluded.matchers,
-				timeout_seconds = excluded.timeout_seconds,
-				severity        = excluded.severity,
-				updated_at      = excluded.updated_at`,
-			teamID, req.Matchers, req.TimeoutSeconds, req.Severity); err != nil {
+		var id int64
+		if err := db.QueryRowContext(r.Context(), `
+			INSERT INTO deadman_switches (team_id, name, matcher, timeout_seconds, severity)
+			VALUES ($1, $2, $3, $4, $5) RETURNING id`,
+			teamID, req.Name, m.config(), req.TimeoutSeconds, req.Severity).Scan(&id); err != nil {
 			respond(w, http.StatusInternalServerError, errResp("internal error"))
 			return
 		}

-		respond(w, http.StatusOK, deadmanResponse{
-			TeamID:         teamID,
-			Matchers:       req.Matchers,
-			TimeoutSeconds: req.TimeoutSeconds,
-			Severity:       req.Severity,
+		respond(w, http.StatusCreated, deadmanSwitchStatus{
+			ID: id, Name: req.Name, Matcher: m.config(),
+			TimeoutSeconds: req.TimeoutSeconds, Severity: req.Severity,
+			Status: switchDormant, Sources: []deadmanSource{},
 		})
 	}
 }
+
+// handleDeleteTeamDeadman removes a switch. An incident it already opened stays
+// open until somebody resolves it: deleting the switch says "stop watching", not
+// "the problem is gone".
+func handleDeleteTeamDeadman(db *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		teamID, ok := teamParam(w, r)
+		if !ok {
+			return
+		}
+		if !requireTeamOwner(w, r, teamID) {
+			return
+		}
+		switchID, err := strconv.ParseInt(chi.URLParam(r, "switchID"), 10, 64)
+		if err != nil {
+			respond(w, http.StatusBadRequest, errResp("invalid switch id"))
+			return
+		}
+
+		res, err := db.ExecContext(r.Context(),
+			"DELETE FROM deadman_switches WHERE id = $1 AND team_id = $2", switchID, teamID)
+		if err != nil {
+			respond(w, http.StatusInternalServerError, errResp("internal error"))
+			return
+		}
+		if n, _ := res.RowsAffected(); n == 0 {
+			respond(w, http.StatusNotFound, errResp("switch not found"))
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}
+}
@@ -5,6 +5,7 @@ import (
 	"embed"
 	"fmt"
 	"io/fs"
+	"log"
 	"sort"
 	"strings"
 	"time"
@@ -15,6 +16,19 @@ import (
 //go:embed migrations
 var migrationsFS embed.FS

+// pingAttempts and pingRetryDelay bound the retry on the first connection.
+// This pod's own IP can reach the Postgres pod's node before that node's
+// NetworkPolicy enforcement (kube-router, reacting to the pod's creation
+// event) has added it to the allowed-source set, which fails the ping with
+// "connection refused" rather than a timeout. That race resolves within
+// several seconds in practice; five attempts two seconds apart give it
+// comfortable room without turning a genuinely absent database into a long
+// hang.
+const (
+	pingAttempts   = 5
+	pingRetryDelay = 2 * time.Second
+)
+
 // Open connects to Postgres. dsn is a libpq connection string or URL, e.g.
 // postgres://terdut:secret@localhost:5432/terdut?sslmode=disable.
 //
@@ -33,11 +47,19 @@ func Open(dsn string) (*sql.DB, error) {
 	db.SetMaxOpenConns(10)
 	db.SetMaxIdleConns(5)
 	db.SetConnMaxLifetime(time.Hour)
-	if err := db.Ping(); err != nil {
-		db.Close()
-		return nil, fmt.Errorf("ping: %w", err)
+
+	for attempt := 1; ; attempt++ {
+		err = db.Ping()
+		if err == nil {
+			return db, nil
+		}
+		if attempt == pingAttempts {
+			db.Close()
+			return nil, fmt.Errorf("ping: %w", err)
+		}
+		log.Printf("open db: ping attempt %d/%d failed, retrying in %s: %v", attempt, pingAttempts, pingRetryDelay, err)
+		time.Sleep(pingRetryDelay)
 	}
-	return db, nil
 }

 // Migrate applies every embedded migration that has not been applied yet, in
@@ -0,0 +1,49 @@
+-- Self-service sign-up, and the invite links that make it useful.
+--
+-- Until now the only way to get an account was for somebody who already had one
+-- to create it, and the login page told people to "ask an admin". That is a
+-- workable arrangement for one operator and an impossible one for a team.
+--
+-- An invite is a link, not an email: this server has no SMTP and adding it to
+-- send one message would be a new subsystem to run, secure and monitor. The
+-- person inviting sends the link however they already talk to the person they
+-- are inviting.
+CREATE TABLE invites (
+    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+
+    -- SHA-256 of the raw token, like api_keys, the integration keys and the
+    -- acknowledgement tokens. A leaked database hands nobody an account.
+    token_hash TEXT NOT NULL UNIQUE,
+
+    -- Which team the invitee lands in, and as what. An invite always names a
+    -- team: an account in no team sees an empty queue and can be paged by
+    -- nobody, which is not a state to invite somebody into.
+    team_id BIGINT NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
+    role    TEXT   NOT NULL CHECK (role IN ('owner', 'member')),
+
+    created_by BIGINT REFERENCES users(id) ON DELETE SET NULL,
+    created_at BIGINT NOT NULL DEFAULT FLOOR(EXTRACT(EPOCH FROM now()))::bigint,
+
+    -- Invites expire. A link that works forever is a credential nobody
+    -- remembers issuing, sitting in a chat log.
+    expires_at BIGINT NOT NULL,
+
+    -- Single-use by default: max_uses 1. A team onboarding six people at once
+    -- can raise it rather than minting six links.
+    max_uses BIGINT NOT NULL DEFAULT 1 CHECK (max_uses > 0 AND max_uses <= 100),
+    uses     BIGINT NOT NULL DEFAULT 0,
+
+    -- Revoked by hand, separately from expiry, so "this link is no longer
+    -- wanted" and "this link timed out" stay distinguishable in the listing.
+    revoked_at BIGINT
+);
+
+CREATE INDEX invites_team_idx ON invites(team_id);
+
+-- Who redeemed which invite. Kept after the invite is gone — the answer to "how
+-- did this account get here" should outlive the link that made it.
+ALTER TABLE users ADD COLUMN invited_via BIGINT REFERENCES invites(id) ON DELETE SET NULL;
+
+-- Where a person is in the first-run checklist, so it can be resumed and
+-- dismissed rather than nagging forever. One row per user, created on demand.
+ALTER TABLE users ADD COLUMN onboarding_dismissed_at BIGINT;
@@ -0,0 +1,23 @@
+-- Similar incidents: a signature per incident, so "has this happened before"
+-- is an indexed equality instead of a search.
+--
+-- The signature is the alert name plus the group labels that identify WHAT is
+-- broken, minus the ones that only say WHERE it happened to run this time
+-- (instance, pod, ...). Two incidents with the same signature in the same team
+-- are the same problem for a responder's purposes.
+--
+-- Computed in Go for new incidents (incidentSignature in incident_store.go).
+-- The backfill below MUST produce the same string; keep the volatile list in
+-- both places in step.
+ALTER TABLE incidents ADD COLUMN signature TEXT NOT NULL DEFAULT '';
+
+UPDATE incidents SET signature =
+    COALESCE(NULLIF(group_labels->>'alertname', ''), title) || '|' ||
+    COALESCE((
+        SELECT string_agg(e.k || '=' || e.v, ',' ORDER BY e.k)
+          FROM jsonb_each_text(incidents.group_labels) AS e(k, v)
+         WHERE e.k <> 'alertname'
+           AND e.k NOT IN ('instance', 'pod', 'pod_name', 'pod_ip', 'container', 'container_name', 'endpoint')
+    ), '');
+
+CREATE INDEX incidents_signature_idx ON incidents(team_id, signature, triggered_at DESC);
@@ -0,0 +1,54 @@
+-- Dead man's switches become rows of their own.
+--
+-- 004 kept a team's switches in one string with one timeout and one severity,
+-- which was enough to configure them and not enough to show them: there was no
+-- thing to list, nothing to hang a status on, and every switch in a team had to
+-- share a deadline. A row per switch gives each its own name, matcher, timeout
+-- and severity, and gives the Team → Switches page something to be a list of.
+--
+-- The matcher keeps the syntax the string used, one matcher per row:
+-- `alertname=Watchdog,cluster=prod`. The unit of monitoring is still the
+-- fingerprint, so a matcher that many clusters satisfy is still one switch row
+-- watching several independent heartbeats.
+CREATE TABLE deadman_switches (
+    id      BIGSERIAL PRIMARY KEY,
+    team_id BIGINT NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
+
+    -- What the owner calls it. Defaults to the matcher when they do not say.
+    name TEXT NOT NULL,
+
+    -- "," separates the label conditions, "=" is exact equality, and alertname is
+    -- mandatory: it is what keeps the sweeper's candidate query on an index.
+    matcher TEXT NOT NULL,
+
+    -- Seconds of silence before the switch is declared dead. Never zero: a switch
+    -- that cannot fire is deleted, not disabled.
+    timeout_seconds BIGINT NOT NULL CHECK (timeout_seconds > 0),
+
+    -- The severity its incidents open at. See 004 for why they carry their own.
+    severity TEXT NOT NULL DEFAULT 'critical',
+
+    created_at BIGINT NOT NULL DEFAULT FLOOR(EXTRACT(EPOCH FROM now()))::bigint
+);
+
+CREATE INDEX deadman_switches_team_idx ON deadman_switches (team_id);
+
+-- Carry every team's configuration over, one row per matcher. A team whose
+-- timeout was zero had switches turned off, which is now "no rows".
+INSERT INTO deadman_switches (team_id, name, matcher, timeout_seconds, severity)
+SELECT c.team_id, btrim(m), btrim(m), c.timeout_seconds, c.severity
+FROM   deadman_configs c,
+       LATERAL regexp_split_to_table(c.matchers, ';') AS m
+WHERE  c.timeout_seconds > 0
+  AND  btrim(m) <> ''
+ORDER  BY c.team_id;
+
+-- The server seeds environment defaults into teams once, and remembers that it
+-- did. An install that had a row per team was already seeded; without this
+-- marker the first start after upgrading would seed teams that had switched
+-- theirs off.
+INSERT INTO settings (key, value)
+SELECT 'deadman_seeded', '1'
+WHERE  EXISTS (SELECT 1 FROM deadman_configs);
+
+DROP TABLE deadman_configs;
@@ -79,3 +79,15 @@ type IncidentEvent struct {
 	Detail     *string   `json:"detail,omitempty"`
 	CreatedAt  time.Time `json:"created_at"`
 }
+
+// SimilarIncident is an earlier, resolved incident with the same signature as
+// the one being looked at. ResolutionNotes are the "what fixed it" notes;
+// NoteCount counts the plain working notes, which live on the timeline.
+type SimilarIncident struct {
+	ID              int64           `json:"id"`
+	Title           string          `json:"title"`
+	TriggeredAt     time.Time       `json:"triggered_at"`
+	ResolvedAt      time.Time       `json:"resolved_at"`
+	NoteCount       int             `json:"note_count"`
+	ResolutionNotes []IncidentEvent `json:"resolution_notes"`
+}
@@ -0,0 +1,26 @@
+package web
+
+import (
+	"io/fs"
+	"strings"
+	"testing"
+)
+
+func TestCopyIncidentIsEmbedded(t *testing.T) {
+	sub, err := fs.Sub(files, "static")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for file, want := range map[string]string{
+		"js/incident.js": "copyIncident",
+		"js/ui.js":       "copy:",
+	} {
+		b, err := fs.ReadFile(sub, file)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !strings.Contains(string(b), want) {
+			t.Errorf("%s lacks %s", file, want)
+		}
+	}
+}
@@ -31,6 +31,14 @@
  --snooze: #6b5bd2;
  --snooze-soft: #efedfb;

+  /* Two hues that mean nothing on their own. The rota needs six colours to
+     tell six people apart and the palette above only has four that are not
+     already an alarm. */
+  --teal: #0f7d8c;
+  --teal-soft: #e3f4f6;
+  --pink: #b3427e;
+  --pink-soft: #fbe8f2;
+
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 1px 3px rgb(16 24 40 / 8%);
@@ -40,7 +48,11 @@
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --topbar-h: 52px;
-  --tabbar-h: 58px;
+  /* No bottom tab bar on any breakpoint any more — mobile uses the hamburger
+     menu in the topbar, desktop the sidebar — so this stays 0. Kept as a
+     variable rather than deleted since .view, .toast and .nav's own height
+     calc still read it. */
+  --tabbar-h: 0px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
 }
@@ -72,6 +84,11 @@
    --snooze: #a89bff;
    --snooze-soft: #262245;

+    --teal: #4fc2d4;
+    --teal-soft: #0f2e33;
+    --pink: #f07fb8;
+    --pink-soft: #3a1c2d;
+
    --shadow: 0 1px 2px rgb(0 0 0 / 40%);
    --shadow-lg: 0 16px 40px rgb(0 0 0 / 55%);
  }
@@ -183,7 +200,13 @@ input:focus, textarea:focus { outline: none; border-color: var(--accent); box-sh
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
 }
-.topbar-title { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
+.topbar-left { display: flex; align-items: center; gap: 8px; min-width: 0; }
+.topbar-title {
+  font-size: 18px; font-weight: 700; letter-spacing: -0.01em;
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0;
+}
+#menu-btn { position: relative; }
+.nav-badge.menu-btn-badge { top: 2px; left: auto; right: 2px; }

 .open-pill {
  display: inline-flex; align-items: center; gap: 6px;
@@ -196,10 +219,12 @@ input:focus, textarea:focus { outline: none; border-color: var(--accent); box-sh
 .open-pill.has-triggered::before { background: var(--crit); }
 .open-pill.all-acked::before { background: var(--warn); }

-/* Bottom tab bar on phones. */
+/* Hidden on phones — mobile navigates through the hamburger menu in the
+   topbar instead (see #menu-btn / openNavMenu in app.js). Reappears as the
+   left sidebar from 900px, where the desktop block below redeclares display. */
 .nav {
+  display: none;
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
-  display: grid; grid-template-columns: repeat(4, 1fr);
  height: calc(var(--tabbar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
@@ -212,8 +237,15 @@ input:focus, textarea:focus { outline: none; border-color: var(--accent); box-sh
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  color: var(--faint); font-size: 11px; font-weight: 600;
+  /* min-width lets a column shrink below its label's natural width, which is
+     what stops six tabs widening the bar past the screen. */
+  min-width: 0; padding: 0 2px;
 }
-.nav-link svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
+.nav-label {
+  max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.nav-link svg { width: 24px; height: 24px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
+
 .nav-link[aria-current="page"] { color: var(--accent); }
 .nav-badge {
  position: absolute; top: 6px; left: calc(50% + 6px);
@@ -327,7 +359,11 @@ input:focus, textarea:focus { outline: none; border-color: var(--accent); box-sh
 .badge.st-triggered, .badge.st-firing { background: var(--crit-soft); color: var(--crit); }
 .badge.st-acknowledged { background: var(--warn-soft); color: var(--warn); }
 .badge.st-snoozed { background: var(--snooze-soft); color: var(--snooze); }
-.badge.st-resolved { background: var(--ok-soft); color: var(--ok); }
+.badge.st-resolved, .badge.st-healthy { background: var(--ok-soft); color: var(--ok); }
+.badge.st-dead { background: var(--crit-soft); color: var(--crit); }
+/* Dormant is the plain badge on purpose: nothing has gone wrong and nothing has
+   gone right, which is what the muted default already says. */
+.badge.st-dormant { background: var(--surface-2); color: var(--muted); }
 .badge.sev-critical { background: var(--crit-soft); color: var(--crit); }
 .badge.sev-warning { background: var(--warn-soft); color: var(--warn); }
 .badge.sev-info { background: var(--info-soft); color: var(--info); }
@@ -345,6 +381,8 @@ input:focus, textarea:focus { outline: none; border-color: var(--accent); box-sh
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
 }
+.detail-head .copy { margin-left: auto; }
+.clip-buffer { position: fixed; top: 0; left: 0; opacity: 0; pointer-events: none; }
 .detail-head .crumb { font-weight: 600; color: var(--muted); font-size: 14px; }
 .detail-title { font-size: 21px; font-weight: 750; letter-spacing: -0.01em; margin: 16px 0 8px; overflow-wrap: anywhere; }
 .detail-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
@@ -418,11 +456,16 @@ details[open] > summary { margin-bottom: 8px; }
 .tl-text { overflow-wrap: anywhere; }
 .tl-text .who { font-weight: 650; }
 .tl-time { color: var(--faint); font-size: 12px; }
-.tl-note .note {
+.note {
  margin-top: 6px; padding: 10px 12px;
  background: var(--surface-2); border-radius: var(--radius-sm);
  white-space: pre-wrap; overflow-wrap: anywhere;
 }
+.note-fix { background: var(--ok-soft); border-left: 3px solid var(--ok); }
+.similar { list-style: none; margin: 0; padding: 0; }
+.similar-item { padding: 10px 0; }
+.similar-item + .similar-item { border-top: 1px solid var(--border, var(--surface-2)); }
+.check { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
 .note-actions { display: flex; justify-content: flex-end; }
 .note-actions .btn { color: var(--muted); }

@@ -566,8 +609,6 @@ kbd {
 /* ---------- desktop ---------- */

@media (min-width: 900px) {
-  :root { --tabbar-h: 0px; }
-
  .app { display: grid; grid-template-columns: 220px 1fr; height: 100dvh; }

  .nav {
@@ -603,6 +644,10 @@ kbd {
  .view-queue .pane { overflow: auto; height: 100dvh; }
  .pane-list { border-right: 1px solid var(--border); }
  .pane-list .chips { position: sticky; top: 0; z-index: 2; background: var(--bg); padding-top: 16px; }
+  /* The pane is 340-420px wide and a mouse cannot scroll a row whose scrollbar
+     is hidden, so the chips wrap here instead: Archived stays reachable. */
+  .pane-list .chips { flex-wrap: wrap; overflow-x: visible; }
+  .pane-list .chip-sep { display: none; }
  .view-queue:not(.has-detail) .pane-detail { display: block; }

  /* On desktop the list stays visible next to the detail. */
@@ -650,6 +695,18 @@ kbd {
 .disabled-row td { opacity: 0.55; }
 .btn-sm.danger { color: var(--crit); border-color: var(--crit-soft); }

+/* --- dead man's switches -------------------------------------------------
+   Six columns do not fit a phone, so the table scrolls inside its card rather
+   than the page. A heartbeat under a switch with several is indented, the way
+   the escalation ladder indents its levels. */
+.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
+.table-scroll { overflow-x: auto; margin-top: 12px; }
+.switch-table th, .switch-table td { white-space: nowrap; }
+.switch-table td:nth-child(2) { white-space: normal; min-width: 12em; }
+.switch-table .source-row td { border-bottom-style: dashed; }
+.switch-table .source-row td:first-child { padding-left: 16px; }
+.source-labels { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
+
 .inline-form { display: flex; gap: 8px; margin-top: 12px; }
 .inline-form input { flex: 1; min-width: 0; }

@@ -658,6 +715,45 @@ kbd {
 .admin-settings button[type="submit"] { margin-top: 12px; }
 .small { font-size: 13px; }

+/* A name in an admin table is the way to that row's own page -- a person's or
+   a team's. */
+.row-link { color: var(--text); font-weight: 650; text-decoration: none; }
+.row-link:hover { color: var(--accent); text-decoration: underline; }
+
+.invite-block { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 12px; }
+.invite-block h3 { margin: 0 0 4px; font-size: 14px; }
+/* The link is shown once and never stored, so it has to be selectable and
+   wrap rather than scroll off the side of a phone. */
+.invite-out { margin-top: 12px; font-size: 13px; }
+.invite-link {
+  display: block; margin-top: 6px; padding: 8px; border-radius: var(--radius-sm);
+  background: var(--surface-2); font-family: var(--mono); font-size: 12px;
+  word-break: break-all; user-select: all;
+}
+
+/* --- one user, one team --------------------------------------------------
+   Both subject pages share this: .user-head and .user-facts are generic
+   despite the names, and a team fills them with its own facts. */
+.back-link {
+  display: inline-flex; align-items: center; gap: 2px; margin-bottom: 12px;
+  color: var(--muted); font-size: 14px; text-decoration: none;
+}
+.back-link:hover { color: var(--text); }
+.back-link svg { width: 18px; height: 18px; }
+
+.user-head { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
+.user-head h2 { margin: 0; }
+
+.user-facts {
+  display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px;
+  margin: 12px 0 0; font-size: 14px;
+}
+.user-facts dt { color: var(--muted); }
+.user-facts dd { margin: 0; overflow-wrap: anywhere; }
+
+.row-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
+.admin-table .row-actions { margin-top: 0; gap: 6px; }
+
 /* --- team settings -------------------------------------------------------
   Forms with a label above each control, rather than the queue's rows of
   links. The escalation ladder is the only nested structure in the app, so it
@@ -668,6 +764,60 @@ kbd {
 .stacked-form input.wide { min-width: min(420px, 100%); }
 .team-picker { margin-top: 8px; max-width: 100%; }

+/* The rota, a month at a time. A name is too wide to print thirty times and
+   too alike down a column to read, so a day carries an initial in that
+   person's colour and the legend underneath says whose. A shift is then a run
+   of one colour, which is the shape the question actually has. */
+.rota-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; padding: 10px; }
+.rota-wd {
+  padding-bottom: 4px; text-align: center;
+  color: var(--muted); font-size: 11px; font-weight: 700;
+  text-transform: uppercase; letter-spacing: 0.04em;
+}
+.rota-day {
+  display: flex; flex-direction: column; align-items: center; gap: 4px;
+  min-height: 52px; padding: 6px 0 8px;
+  border: 0; border-radius: var(--radius-sm); background: none;
+  font: inherit; color: inherit;
+}
+button.rota-day { cursor: pointer; }
+button.rota-day:hover { background: var(--surface-2); }
+.rota-num { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
+.rota-day.today { background: var(--accent-soft); }
+.rota-day.today .rota-num { color: var(--accent); font-weight: 700; }
+.rota-day.past { opacity: 0.55; }
+/* The days either side of the month are real days and are drawn, but they
+   belong to the month you are not looking at. */
+.rota-day.outside { opacity: 0.35; }
+
+.rota-chip {
+  display: grid; place-items: center;
+  width: 26px; height: 26px; border-radius: 50%;
+  font-size: 12px; font-weight: 750; text-transform: uppercase;
+}
+/* An empty day is a dot rather than a hole, and keeps the chip's box so the
+   rows stay on one baseline. */
+.rota-chip.none { width: 8px; height: 8px; margin: 9px; background: var(--border-strong); }
+
+/* Six colours, then they repeat; the initial inside still tells two people
+   apart. Deliberately not the severity palette — nothing here is critical. */
+.rc1 { background: var(--accent-soft); color: var(--accent); }
+.rc2 { background: var(--ok-soft); color: var(--ok); }
+.rc3 { background: var(--snooze-soft); color: var(--snooze); }
+.rc4 { background: var(--warn-soft); color: var(--warn); }
+.rc5 { background: var(--teal-soft); color: var(--teal); }
+.rc6 { background: var(--pink-soft); color: var(--pink); }
+
+.rota-foot { padding: 12px 14px; border-top: 1px solid var(--border); }
+.rota-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; font-size: 14px; }
+.rota-key { display: inline-flex; align-items: center; gap: 6px; }
+.rota-key .rota-chip { width: 22px; height: 22px; font-size: 11px; }
+.rota-note { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
+.rota-note:first-child { margin-top: 0; }
+.rota-bulk { padding: 12px 14px; border-top: 1px solid var(--border); }
+.rota-bulk .stacked-form { margin-top: 4px; }
+.sheet-pick { display: flex; align-items: center; gap: 8px; font-size: 14px; }
+
 .ladder-level {
  border-left: 3px solid var(--border-strong);
  padding: 8px 0 8px 12px; margin: 12px 0;
@@ -687,3 +837,97 @@ kbd {
  border-radius: 6px; padding: 8px; font-size: 12px;
 }
 .key-url code { word-break: break-all; }
+
+/* --- onboarding checklist ------------------------------------------------
+   Sits above the queue until it is finished or hidden. Deliberately plain:
+   it is a list of things to do, not a celebration. */
+.onboarding { border-left: 3px solid var(--accent); }
+.onboarding-head { display: flex; align-items: center; gap: 10px; }
+.onboarding-head h2 { flex: 1; margin: 0; }
+.checklist { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
+.checklist .step { display: flex; gap: 10px; align-items: flex-start; }
+.checklist .step p { margin: 2px 0 0; }
+.step-mark {
+  flex: none; width: 20px; height: 20px; border-radius: 50%;
+  border: 1px solid var(--border-strong); color: var(--accent);
+  display: flex; align-items: center; justify-content: center; font-size: 13px;
+}
+.step.done .step-mark { border-color: var(--accent); }
+.step.done > div > strong { color: var(--muted); text-decoration: line-through; }
+.step-actions { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
+
+.signup-intro { margin: 0 0 4px; font-size: 14px; color: var(--muted); }
+
+/* --- sub-navigation -------------------------------------------------------
+   A strip of links across the top of every Admin and every Team page, one per
+   sub-section. Deliberately not .chip: chips filter what a page already shows,
+   here and in the queue, and these go somewhere. Same aria-current convention
+   as the tab bar, so the state lives on the attribute rather than in a class.
+
+   Six entries do not fit a phone's width, which is what the horizontal scroll
+   below is for -- the Team tab's strip is the one that needs it. */
+.subnav {
+  display: flex; gap: 2px;
+  margin: 12px auto 0;
+  border-bottom: 1px solid var(--border);
+  overflow-x: auto; scrollbar-width: none;
+}
+.subnav::-webkit-scrollbar { display: none; }
+.subnav-link {
+  flex: none;
+  padding: 8px 12px; margin-bottom: -1px;
+  border-bottom: 2px solid transparent;
+  color: var(--muted); font-size: 14px; font-weight: 600; white-space: nowrap;
+}
+.subnav-link:hover { color: var(--text); }
+.subnav-link[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }
+
+/* The overview a tab opens on, at /admin and at /team. The strip above already
+   links to the sections, so these carry the counts, which is the part a menu
+   cannot say. Not named for either tab: both use it, and the one that renamed
+   .user-link to .row-link is the same rename for the same reason. */
+.overview-menu { display: grid; gap: 10px; margin-top: 16px; }
+/* The grid's gap is the spacing here, so .card + .card must not add its own. */
+.overview-menu .card + .card { margin-top: 0; }
+.overview-item { display: block; padding: 14px; }
+.overview-item:hover { background: var(--surface-hover); }
+.overview-head { display: flex; align-items: baseline; gap: 8px; }
+.overview-count { margin-left: auto; color: var(--muted); font-size: 18px; font-weight: 700; }
+.overview-item p { margin: 4px 0 0; }
+
+/* ---------- stats page ---------- */
+
+#view-stats .chips { padding-left: 0; padding-right: 0; }
+.stats { display: grid; gap: 14px; padding-bottom: 16px; }
+.stat-tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
+.stat-tile {
+  --sev: var(--border-strong);
+  background: var(--surface); border: 1px solid var(--border);
+  border-left: 3px solid var(--sev); border-radius: var(--radius);
+  box-shadow: var(--shadow); padding: 12px;
+}
+.stat-tile.st-triggered { --sev: var(--crit); }
+.stat-tile.st-acknowledged { --sev: var(--warn); }
+.stat-tile.st-resolved { --sev: var(--ok); }
+.stat-value { font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; }
+.stat-label { margin-top: 2px; font-size: 12px; color: var(--muted); }
+.chart-card + .chart-card { margin-top: 0; }
+.chart-title {
+  margin-bottom: 10px; font-size: 13px; font-weight: 700;
+  text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted);
+}
+.hbars { list-style: none; display: grid; gap: 6px; }
+.hbar { display: grid; grid-template-columns: minmax(80px, 34%) 1fr auto; align-items: center; gap: 8px; font-size: 13px; }
+.hbar-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.hbar-track { height: 10px; border-radius: 5px; background: var(--surface-2); overflow: hidden; }
+.hbar-fill { display: block; height: 100%; border-radius: 5px; background: var(--ok); }
+.hbar-count { min-width: 2ch; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
+.columns { display: block; width: 100%; height: auto; }
+.columns .axis { stroke: var(--border-strong); stroke-width: 1; }
+.columns .col-hit { fill: transparent; }
+.columns .col-bar { fill: var(--accent); }
+.columns .col:hover .col-bar { opacity: 0.75; }
+.columns .col-label { fill: var(--faint); font-size: 10px; font-family: var(--font); }
+@media (min-width: 900px) {
+  .stat-tiles { grid-template-columns: repeat(3, 1fr); }
+}
@@ -37,6 +37,37 @@
      <button class="btn btn-primary btn-block" type="submit">Sign in</button>
      <p class="login-hint">No password yet? Ask an admin to set one, or run
        <code>PUT /api/users/{id}/password</code> with your API key.</p>
+      <p class="login-hint" id="signup-link" hidden>
+        No account? <a href="/signup">Create one</a>.</p>
+    </form>
+
+    <!-- Sign-up. Shown instead of the login card at /signup, and only offers
+         what the server allows: an invite link, or open sign-up. -->
+    <form id="signup-form" class="login-card" autocomplete="on" hidden>
+      <div class="login-brand">
+        <img src="/icon.svg" alt="" width="40" height="40">
+        <h1>terdut</h1>
+      </div>
+      <p class="signup-intro" id="signup-intro"></p>
+      <label>
+        <span>Username</span>
+        <input name="username" autocomplete="username" autocapitalize="none" spellcheck="false" required>
+      </label>
+      <label>
+        <span>Email</span>
+        <input name="email" type="email" autocomplete="email" required>
+      </label>
+      <label>
+        <span>Password</span>
+        <input name="password" type="password" autocomplete="new-password" minlength="10" required>
+      </label>
+      <label id="signup-team-label" hidden>
+        <span>Team name</span>
+        <input name="team_name" autocomplete="off">
+      </label>
+      <p class="form-error" role="alert" hidden></p>
+      <button class="btn btn-primary btn-block" type="submit">Create account</button>
+      <p class="login-hint">Already have one? <a href="/">Sign in</a>.</p>
    </form>
  </main>

@@ -46,38 +77,48 @@
        <img src="/icon.svg" alt="" width="28" height="28">
        <span>terdut</span>
      </a>
-      <a class="nav-link" href="/" data-section="queue">
+      <a class="nav-link" href="/" data-section="queue" aria-label="Queue">
        <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 6h16M4 12h16M4 18h10"/></svg>
        <span class="nav-label">Queue</span>
        <span class="nav-badge" data-badge hidden></span>
      </a>
-      <a class="nav-link" href="/oncall" data-section="oncall">
+      <a class="nav-link" href="/oncall" data-section="oncall" aria-label="On-call">
        <svg viewBox="0 0 24 24" aria-hidden="true"><rect x="3.5" y="5" width="17" height="15" rx="2"/><path d="M3.5 10h17M8 3v4M16 3v4"/></svg>
        <span class="nav-label">On-call</span>
      </a>
-      <a class="nav-link" href="/alerts" data-section="alerts">
+      <a class="nav-link" href="/alerts" data-section="alerts" aria-label="Alerts">
        <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M6 16V11a6 6 0 0 1 12 0v5l1.5 2h-15z"/><path d="M10 20.5a2 2 0 0 0 4 0"/></svg>
        <span class="nav-label">Alerts</span>
      </a>
-      <a class="nav-link" href="/team" data-section="team">
+      <a class="nav-link" href="/stats" data-section="stats" aria-label="Stats">
+        <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 20h16M7 20v-7M12 20V6M17 20v-10"/></svg>
+        <span class="nav-label">Stats</span>
+      </a>
+      <a class="nav-link" href="/team" data-section="team" aria-label="Team">
        <svg viewBox="0 0 24 24" aria-hidden="true"><circle cx="9" cy="8" r="3"/><circle cx="17" cy="9" r="2.5"/><path d="M3 19a6 6 0 0 1 12 0M15 19a5 5 0 0 1 6-4"/></svg>
        <span class="nav-label">Team</span>
      </a>
      <!-- Hidden unless the signed-in user is a system administrator; app.js
           unhides it once /api/me says so. The server refuses every admin
           endpoint regardless, so this is a courtesy and not a gate. -->
-      <a class="nav-link" href="/admin" data-section="admin" id="nav-admin" hidden>
+      <a class="nav-link" href="/admin" data-section="admin" aria-label="Admin" id="nav-admin" hidden>
        <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M12 3l7 3v6c0 4-3 7-7 9-4-2-7-5-7-9V6z"/></svg>
        <span class="nav-label">Admin</span>
      </a>
-      <a class="nav-link" href="/more" data-section="more">
+      <a class="nav-link" href="/more" data-section="more" aria-label="Account">
        <svg viewBox="0 0 24 24" aria-hidden="true"><circle cx="12" cy="8" r="3.5"/><path d="M5 20a7 7 0 0 1 14 0"/></svg>
        <span class="nav-label">Account</span>
      </a>
    </nav>

    <header class="topbar">
-      <h1 class="topbar-title" id="topbar-title">Queue</h1>
+      <div class="topbar-left">
+        <button class="btn btn-ghost btn-icon" id="menu-btn" type="button" aria-label="Menu" aria-haspopup="menu">
+          <svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 7h16M4 12h16M4 17h16"/></svg>
+          <span class="nav-badge menu-btn-badge" data-badge hidden></span>
+        </button>
+        <h1 class="topbar-title" id="topbar-title">Queue</h1>
+      </div>
      <span class="open-pill" id="open-pill" hidden></span>
    </header>

@@ -91,8 +132,15 @@

    <section id="view-oncall" class="view view-page" data-view="oncall" hidden></section>
    <section id="view-alerts" class="view view-page" data-view="alerts" hidden></section>
+    <section id="view-stats" class="view view-page" data-view="stats" hidden></section>
    <section id="view-team" class="view view-page" data-view="team" hidden></section>
    <section id="view-admin" class="view view-page" data-view="admin" hidden></section>
+    <!-- One person, at /admin/users/{id}: reached from the Admin tab's user
+         list, and a section of its own so a deep link survives a reload. -->
+    <section id="view-adminuser" class="view view-page" data-view="adminuser" hidden></section>
+    <!-- One team, at /admin/teams/{id}: who is in it and the invites into it,
+         which the Team tab cannot show for a team you are not a member of. -->
+    <section id="view-adminteam" class="view view-page" data-view="adminteam" hidden></section>
    <section id="view-more" class="view view-page" data-view="more" hidden></section>
  </div>

@@ -23,6 +23,9 @@ function render() {
        h('div', { class: 'account-name', text: user.username }),
        h('div', { class: 'account-email', text: user.email }))),

+    h('div', { class: 'page-head' }, h('h2', { text: 'Notifications' })),
+    notifyForm(user),
+
    h('div', { class: 'page-head' }, h('h2', { text: hasPassword ? 'Change password' : 'Set a password' })),
    passwordForm(user, hasPassword),

@@ -32,10 +35,90 @@ function render() {

    h('div', { class: 'page-head' }),
    h('button', { class: 'btn btn-block', type: 'button', onclick: signOut }, icon('logout'), 'Sign out'),
-    h('p', { class: 'foot-note', text: 'Schedule editing, statistics and user management are in terdut-tui for now.' }),
  );
 }

+// Where this user's pages go. The onboarding checklist's first step sends
+// people here for it, and until now there was nothing here to send them to:
+// the topic could only be set with curl or by an administrator.
+//
+// The topic is the whole address — the server it is published to is the
+// install's one ntfy, set in the deployment and not something a user picks.
+function notifyForm(user) {
+  const err = h('p', { class: 'form-error', role: 'alert', hidden: true });
+  const ok = h('p', { class: 'form-ok', role: 'status', hidden: true });
+  const topic = h('input', {
+    name: 'ntfy_topic', type: 'text', autocomplete: 'off',
+    autocapitalize: 'none', spellcheck: false,
+    value: user.ntfy_topic || '',
+    placeholder: 'terdut-a7f3c91e',
+  });
+  const submit = h('button', { class: 'btn btn-primary', type: 'submit', text: 'Save topic' });
+
+  // Only offered once a topic is saved: the test publishes to whatever the
+  // server has stored, not to whatever is half-typed in the field.
+  const test = h('button', {
+    class: 'btn', type: 'button', text: 'Send a test push',
+    hidden: !user.ntfy_topic,
+    onclick: async () => {
+      err.hidden = true;
+      ok.hidden = true;
+      test.disabled = true;
+      try {
+        await api.testNotification();
+        ok.textContent = 'Sent. If nothing arrives, the topic is wrong or ntfy is not reachable.';
+        ok.hidden = false;
+      } catch (ex) {
+        err.textContent = ex.message;
+        err.hidden = false;
+      } finally {
+        test.disabled = false;
+      }
+    },
+  });
+
+  const form = h('form', { class: 'card pw-form' },
+    h('label', {},
+      h('span', { text: 'ntfy topic' }),
+      topic),
+    h('p', { class: 'muted small' },
+      'Subscribe to this topic in the ntfy app and incidents assigned to you ',
+      'reach your phone. Leave it empty and they page the team’s fallback ',
+      'topic instead.'),
+    // Worth saying plainly: people reach for their own name, and the topic is
+    // the only thing standing between a stranger and their pages.
+    h('p', { class: 'muted small' },
+      'Anyone who knows the topic can read your pages and publish to it, so ',
+      'pick something unguessable rather than your name.'),
+    err, ok,
+    h('div', { class: 'row-actions' }, submit, test),
+  );
+
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    err.hidden = true;
+    ok.hidden = true;
+    submit.disabled = true;
+    try {
+      const updated = await api.setNotifyTarget(user.id, topic.value.trim());
+      // Keep the cached user in step, so the onboarding checklist stops
+      // asking for this and the test button appears without a reload.
+      state.me.user = updated;
+      ok.textContent = updated.ntfy_topic
+        ? 'Topic saved.'
+        : 'Topic cleared. Your pages go to the team’s fallback topic.';
+      ok.hidden = false;
+      test.hidden = !updated.ntfy_topic;
+    } catch (ex) {
+      err.textContent = ex.message;
+      err.hidden = false;
+    } finally {
+      submit.disabled = false;
+    }
+  });
+  return form;
+}
+
 function passwordForm(user, hasPassword) {
  const err = h('p', { class: 'form-error', role: 'alert', hidden: true });
  const ok = h('p', { class: 'form-ok', role: 'status', hidden: true });
@@ -1,23 +1,51 @@
 // Administration: the teams on this server, the people who can sign in, and
 // the settings that change how the server behaves.
 //
+// Each of those three is a route of its own, reached from a strip across the
+// top, with /admin itself an overview. They used to be three cards stacked on
+// one page, which meant no way to link to the settings, no way back to the top
+// of the user list but scrolling, and a poll that refetched all three endpoints
+// however little of the page you were looking at.
+//
 // Only rendered for a system administrator. The server enforces that on every
 // endpoint regardless — hiding a section is a courtesy to the reader, not a
 // permission — so this view simply says so rather than pretending to be a
 // gate.

 import * as api from './api.js';
-import { h, clear, spinner, confirm } from './ui.js';
+import { h, clear, spinner, confirm, menuCard } from './ui.js';
 import { state, myID } from './state.js';

 const view = () => document.getElementById('view-admin');

-let data = null; // { teams, users, settings }
+// The sub-sections, in the order the strip shows them. The overview is /admin
+// itself, so it has no tab of its own. This table is the only place the four
+// routes are written down: app.js parses against it and the strip is built
+// from it, so adding a fifth is one line here.
+export const TABS = [
+  { tab: null, path: '/admin', label: 'Overview' },
+  { tab: 'teams', path: '/admin/teams', label: 'Teams' },
+  { tab: 'users', path: '/admin/users', label: 'Users' },
+  { tab: 'settings', path: '/admin/settings', label: 'Settings' },
+];
+
+// Which sub-section is open. Remembered rather than passed, because the poll
+// loop calls refresh() with no route — the same reason adminuser.js keeps its
+// user ID in the module.
+let tab = null;
+let data = null; // whatever the current tab needs; the shape varies by tab
 let error = null;
 let busy = false;

-export function show() {
-  if (!data) clear(view(), spinner());
+export function show(route) {
+  const next = route?.tab ?? null;
+  // A different sub-section wants different data, so the old answer goes
+  // rather than being shown under the new heading until the fetch lands.
+  if (next !== tab) {
+    tab = next;
+    data = null;
+  }
+  if (!data) clear(view(), subnav(), spinner());
  refresh();
 }

@@ -28,12 +56,7 @@ export async function refresh() {
    return;
  }
  try {
-    const [teams, users, settings] = await Promise.all([
-      api.adminTeams(),
-      api.users(),
-      api.adminSettings(),
-    ]);
-    data = { teams, users, settings };
+    data = await load();
    error = null;
  } catch (err) {
    error = err.message;
@@ -41,6 +64,16 @@ export async function refresh() {
  render();
 }

+// Only what the open sub-section shows. Users is the one that needs two: it
+// only points at Teams for an invite if there is a team to point at, and the
+// overview counts both.
+async function load() {
+  if (tab === 'teams') return { teams: await api.adminTeams() };
+  if (tab === 'settings') return { settings: await api.adminSettings() };
+  const [teams, users] = await Promise.all([api.adminTeams(), api.users()]);
+  return { teams, users };
+}
+
 function render() {
  if (!state.me?.user?.is_admin) {
    clear(view(), h('div', { class: 'card' },
@@ -48,14 +81,56 @@ function render() {
    return;
  }
  if (!data) {
-    clear(view(), error ? h('div', { class: 'load-error', text: error }) : spinner());
+    clear(view(), subnav(), error ? h('div', { class: 'load-error', text: error }) : spinner());
    return;
  }
  clear(view(),
+    subnav(),
    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
-    teamsCard(),
-    usersCard(),
-    settingsCard(),
+    section(),
+  );
+}
+
+function section() {
+  if (tab === 'teams') return teamsCard();
+  if (tab === 'users') return usersCard();
+  if (tab === 'settings') return settingsCard();
+  return overview();
+}
+
+// The strip across the top of every admin page. Ordinary links rather than
+// buttons, because these are four URLs: app.js intercepts the click, the
+// browser's Back walks them, and a reload lands where you were.
+function subnav() {
+  return h('nav', { class: 'subnav', 'aria-label': 'Administration' },
+    TABS.map((t) => h('a', {
+      class: 'subnav-link',
+      href: t.path,
+      text: t.label,
+      'aria-current': t.tab === tab ? 'page' : null,
+    })));
+}
+
+// --- overview --------------------------------------------------------------
+
+// /admin itself. The strip already links to the three, so this earns its place
+// by saying how much of each there is — the one thing a menu cannot.
+function overview() {
+  const admins = data.users.filter((u) => u.is_admin).length;
+  const disabled = data.users.filter((u) => u.disabled_at).length;
+  const open = data.teams.reduce((n, t) => n + t.open_incidents, 0);
+
+  const people = [`${admins} ${admins === 1 ? 'administrator' : 'administrators'}`];
+  if (disabled > 0) people.push(`${disabled} disabled`);
+
+  return h('div', { class: 'overview-menu' },
+    menuCard('/admin/teams', 'Teams', data.teams.length,
+      open > 0
+        ? `${open} open ${open === 1 ? 'incident' : 'incidents'} between them.`
+        : 'Nothing open anywhere.'),
+    menuCard('/admin/users', 'Users', data.users.length, `${people.join(', ')}.`),
+    menuCard('/admin/settings', 'Settings', null,
+      'How the server behaves, and where it is plugged in.'),
  );
 }

@@ -64,37 +139,24 @@ function render() {
 function teamsCard() {
  const rows = data.teams.map((t) =>
    h('tr', {},
-      h('td', {}, h('strong', { text: t.name })),
+      // The name is the way in: everything about one team lives on its own
+      // page, and this table stays a list rather than becoming a form.
+      h('td', {}, h('a', { class: 'row-link', href: `/admin/teams/${t.id}`, text: t.name })),
      h('td', { class: 'num', text: String(t.members) }),
      h('td', { class: 'num', text: String(t.open_incidents) }),
-      h('td', {},
-        h('button', {
-          class: 'btn-sm',
-          type: 'button',
-          text: 'Rename',
-          onclick: () => renameTeam(t),
-        }),
-        // A team with open incidents cannot be deleted, and saying so before
-        // the click is kinder than a 409 afterwards.
-        h('button', {
-          class: 'btn-sm danger',
-          type: 'button',
-          text: 'Delete',
-          disabled: t.open_incidents > 0,
-          title: t.open_incidents > 0 ? 'Resolve its open incidents first' : '',
-          onclick: () => deleteTeam(t),
-        }),
-      ),
    ));

  return h('div', { class: 'card' },
    h('h2', { text: 'Teams' }),
+    h('p', { class: 'muted small' },
+      'Open a team for who is in it, the invites into it, and renaming or ',
+      'deleting it. Deleting takes its alerts, incidents, schedule and ',
+      'integrations with it, and is refused while anything is still open.'),
    h('table', { class: 'admin-table' },
      h('thead', {}, h('tr', {},
        h('th', { text: 'Name' }),
        h('th', { class: 'num', text: 'Members' }),
-        h('th', { class: 'num', text: 'Open' }),
-        h('th', { text: '' }))),
+        h('th', { class: 'num', text: 'Open' }))),
      h('tbody', {}, rows)),
    newTeamForm(),
  );
@@ -122,32 +184,6 @@ function newTeamForm() {
  return form;
 }

-async function renameTeam(team) {
-  const next = window.prompt(`Rename ${team.name} to:`, team.name);
-  if (!next || next === team.name) return;
-  try {
-    await api.renameTeam(team.id, next);
-  } catch (err) {
-    error = err.message;
-  }
-  refresh();
-}
-
-async function deleteTeam(team) {
-  if (!(await confirm({
-    title: `Delete ${team.name}?`,
-    text: 'Its alerts, incidents, schedule and integrations go with it. This cannot be undone.',
-    confirmLabel: 'Delete',
-    danger: true,
-  }))) return;
-  try {
-    await api.deleteTeam(team.id);
-  } catch (err) {
-    error = err.message;
-  }
-  refresh();
-}
-
 // --- users -----------------------------------------------------------------

 function usersCard() {
@@ -155,7 +191,9 @@ function usersCard() {
    const self = u.id === myID();
    return h('tr', { class: u.disabled_at ? 'disabled-row' : '' },
      h('td', {},
-        h('strong', { text: u.username }),
+        // The name is the way in: everything about one person lives on their
+        // own page, and this table stays a list rather than becoming a form.
+        h('a', { class: 'row-link', href: `/admin/users/${u.id}`, text: u.username }),
        u.disabled_at && h('span', { class: 'row-team', text: 'disabled' }),
        self && h('span', { class: 'you', text: 'you' })),
      h('td', { class: 'muted', text: u.email }),
@@ -184,7 +222,8 @@ function usersCard() {
    h('h2', { text: 'Users' }),
    h('p', { class: 'muted small' },
      'Disabling an account stops it signing in and stops its API keys, and keeps ',
-      'its acknowledgements and timeline entries. Deleting a user erases those.'),
+      'its acknowledgements and timeline entries. Deleting a user erases those. ',
+      'Open a name for their teams, their password and the rest.'),
    h('table', { class: 'admin-table' },
      h('thead', {}, h('tr', {},
        h('th', { text: 'User' }),
@@ -192,6 +231,27 @@ function usersCard() {
        h('th', { text: '' }),
        h('th', { text: '' }))),
      h('tbody', {}, rows)),
+    invitePointer(),
+  );
+}
+
+// Adding a person is minting them an invite into a team, not creating a row:
+// whoever accepts it picks their own password, so one never passes through an
+// administrator, and the link carries the team, so they do not land on an empty
+// queue.
+//
+// The form for it lives on the team's own page. It always needed a team beside
+// it, and a picker here was the admission that an invite is a fact about a team
+// rather than about the server.
+function invitePointer() {
+  return h('div', { class: 'invite-block' },
+    h('h3', { text: 'Add someone' }),
+    data.teams.length > 0
+      ? h('p', { class: 'muted small' },
+        'Open the team you want them in, under ',
+        h('a', { class: 'row-link', href: '/admin/teams', text: 'Teams' }),
+        ', and mint an invite there.')
+      : h('p', { class: 'muted small', text: 'Create a team first — an invite has to lead somewhere.' }),
  );
 }

@@ -0,0 +1,341 @@
+// One team, at /admin/teams/{id}: what it is, who is in it, the invites into
+// it, and the two destructive things an administrator can do to it.
+//
+// The mirror of adminuser.js. That page answers "which teams is this person
+// in"; this one answers "who is in this team" for a team the administrator
+// need not be a member of — which the Team tab cannot do, because it only
+// offers teams the viewer is in.
+//
+// Only rendered for a system administrator. The server enforces that on every
+// endpoint regardless, so this view says so rather than pretending to be a
+// gate.
+
+import * as api from './api.js';
+import { h, clear, spinner, confirm, toast, icon } from './ui.js';
+import { state } from './state.js';
+import { navigate } from './app.js';
+import { when } from './format.js';
+
+const view = () => document.getElementById('view-adminteam');
+
+let teamID = null;
+let data = null; // { team, members, users, invites }
+let error = null;
+let busy = false;
+// An invite link is shown once and never stored, so it lives here until the
+// page is left rather than being toasted away after three seconds.
+let freshInvite = null;
+
+export function show(route) {
+  const next = route && route.team != null ? route.team : null;
+  if (next !== teamID) {
+    teamID = next;
+    data = null;
+    error = null;
+    freshInvite = null;
+  }
+  if (!data) clear(view(), spinner());
+  refresh();
+}
+
+export async function refresh() {
+  if (teamID == null || !state.me?.user?.is_admin) {
+    render();
+    return;
+  }
+  try {
+    // The team and its members come from the admin endpoint in one answer:
+    // /teams/{id}/members is member-only and 404s an administrator from
+    // outside the team, deliberately. users() is the add-a-member picker.
+    const [team, users, invites] = await Promise.all([
+      api.adminTeam(teamID),
+      api.users(),
+      api.invites(teamID),
+    ]);
+    data = { team: team.team, members: team.members, users, invites };
+    error = null;
+  } catch (err) {
+    // A team that is gone answers 404, where a missing user is simply absent
+    // from a list adminuser.js already has. So the "no such team" state has to
+    // be recognised here; left to the error banner it would read as a fetch
+    // that failed, which is a different thing and invites a retry.
+    if (err.status === 404) {
+      data = { team: null, members: [], users: [], invites: [] };
+      error = null;
+    } else {
+      error = err.message;
+    }
+  }
+  render();
+}
+
+function render() {
+  const el = view();
+  if (!state.me?.user?.is_admin) {
+    clear(el, backLink(), h('div', { class: 'card' },
+      h('p', { class: 'muted', text: 'Administration is for system administrators. Ask one for access.' })));
+    return;
+  }
+  if (!data) {
+    clear(el, backLink(), error ? h('div', { class: 'load-error', text: error }) : spinner());
+    return;
+  }
+  if (!data.team) {
+    clear(el, backLink(), h('div', { class: 'card' },
+      h('p', { class: 'muted', text: 'No such team. It may have just been deleted.' })));
+    return;
+  }
+  clear(el,
+    backLink(),
+    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
+    identityCard(),
+    membersCard(),
+    invitesCard(),
+    dangerCard(),
+  );
+}
+
+function backLink() {
+  return h('a', { class: 'back-link', href: '/admin/teams' }, icon('chevronLeft'), h('span', { text: 'Teams' }));
+}
+
+// --- identity --------------------------------------------------------------
+
+function identityCard() {
+  const t = data.team;
+  const err = h('p', { class: 'form-error', role: 'alert', hidden: true });
+  const ok = h('p', { class: 'form-ok', role: 'status', hidden: true });
+  const name = h('input', {
+    name: 'name', type: 'text', value: t.name, required: true,
+    autocomplete: 'off', spellcheck: false,
+  });
+  const submit = h('button', { class: 'btn btn-primary', type: 'submit', text: 'Save name' });
+
+  // A field rather than the window.prompt this used to be. The server answers
+  // 409 for a name already taken, and a dialog is the wrong place to read that.
+  const form = h('form', { class: 'inline-form' }, name, submit);
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    if (busy) return;
+    err.hidden = true;
+    ok.hidden = true;
+    const next = name.value.trim();
+    if (!next || next === t.name) return;
+    busy = true;
+    submit.disabled = true;
+    try {
+      await api.renameTeam(teamID, next);
+      ok.textContent = 'Name saved.';
+      ok.hidden = false;
+      error = null;
+    } catch (ex) {
+      err.textContent = ex.message;
+      err.hidden = false;
+      busy = false;
+      submit.disabled = false;
+      return;
+    }
+    busy = false;
+    submit.disabled = false;
+    await refresh();
+  });
+
+  return h('div', { class: 'card' },
+    h('div', { class: 'user-head' }, h('h2', { text: t.name })),
+    h('dl', { class: 'user-facts' },
+      fact('Created', when(t.created_at)),
+      fact('Members', String(t.members)),
+      fact('Open incidents', String(t.open_incidents)),
+    ),
+    form, err, ok,
+  );
+}
+
+function fact(label, value) {
+  return [h('dt', { text: label }), h('dd', { text: value })];
+}
+
+// --- members ---------------------------------------------------------------
+
+// An administrator passes every team-owner check without being in the team,
+// which is what lets them repair a team whose owner has left. So this card
+// edits rather than reporting what somebody else would have to do.
+function membersCard() {
+  const rows = data.members.map((m) =>
+    h('tr', {},
+      // Unlike the Team tab's own member list, the name is a link: that
+      // person's page is where the rest of them lives.
+      h('td', {}, h('a', { class: 'row-link', href: `/admin/users/${m.user_id}`, text: m.username })),
+      h('td', { class: 'muted small', text: m.role }),
+      h('td', { class: 'row-actions' },
+        h('button', {
+          class: 'btn-sm', type: 'button',
+          text: m.role === 'owner' ? 'Make member' : 'Make owner',
+          // The same endpoint both ways: adding is an upsert on the role.
+          onclick: () => act(() =>
+            api.addTeamMember(teamID, m.user_id, m.role === 'owner' ? 'member' : 'owner')),
+        }),
+        h('button', {
+          class: 'btn-sm danger', type: 'button', text: 'Remove',
+          // The server refuses the last owner with a 409, which act() shows.
+          onclick: () => act(() => api.removeTeamMember(teamID, m.user_id)),
+        }),
+      ),
+    ));
+
+  const inTeam = new Set(data.members.map((m) => m.user_id));
+  // A disabled account cannot sign in, so putting one on a rota would be
+  // staffing the team with somebody who cannot answer.
+  const candidates = data.users.filter((u) => !inTeam.has(u.id) && !u.disabled_at);
+  const pick = h('select', {},
+    ...candidates.map((u) => h('option', { value: String(u.id), text: u.username })));
+  const role = h('select', {},
+    h('option', { value: 'member', text: 'member' }),
+    h('option', { value: 'owner', text: 'owner' }));
+  const form = h('form', { class: 'inline-form' }, pick, role,
+    h('button', { class: 'btn', type: 'submit', text: 'Add' }));
+  form.addEventListener('submit', (e) => {
+    e.preventDefault();
+    act(() => api.addTeamMember(teamID, Number(pick.value), role.value));
+  });
+
+  return h('div', { class: 'card' },
+    h('h2', { text: 'Members' }),
+    data.members.length === 0 && h('p', { class: 'muted small' },
+      'Nobody is in this team. Its queue has no one to work it and its ',
+      'escalation has no one to reach — add somebody, or delete it.'),
+    data.members.length > 0 && h('table', { class: 'admin-table' }, h('tbody', {}, rows)),
+    candidates.length > 0 && form,
+  );
+}
+
+// --- invites ---------------------------------------------------------------
+
+// Adding a person to the server is minting them an invite into a team, not
+// creating a row: whoever accepts it picks their own password, so one never
+// passes through an administrator, and the link carries the team, so they do
+// not land on an empty queue.
+//
+// This lives on the team rather than on the Users page, where it used to be
+// with a team picker beside it. The picker was the admission that an invite is
+// a fact about a team.
+function invitesCard() {
+  const role = h('select', {},
+    h('option', { value: 'member', text: 'member' }),
+    h('option', { value: 'owner', text: 'owner' }));
+  const form = h('form', { class: 'inline-form' }, role,
+    h('button', { class: 'btn', type: 'submit', text: 'Create invite' }));
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    if (busy) return;
+    busy = true;
+    try {
+      const inv = await api.createInvite(teamID, role.value, 1);
+      freshInvite = inv.url;
+      error = null;
+    } catch (err) {
+      error = err.message;
+    } finally {
+      busy = false;
+    }
+    await refresh();
+  });
+
+  // The server lists spent and revoked invites too, and they are worth seeing:
+  // "who was invited here" is part of the answer to "who is in this team".
+  // Only a live one can be revoked, so only a live one offers the button.
+  const rows = (data.invites || []).map((inv) => {
+    const state = inviteState(inv);
+    return h('tr', { class: state === 'live' ? '' : 'disabled-row' },
+      h('td', {}, h('strong', { text: inv.role })),
+      h('td', { class: 'muted small', text: `${inv.uses}/${inv.max_uses} used` }),
+      h('td', { class: 'muted small', text: state === 'live' ? `expires ${when(inv.expires_at)}` : state }),
+      h('td', { class: 'row-actions' },
+        state === 'live' && h('button', {
+          class: 'btn-sm danger', type: 'button', text: 'Revoke',
+          onclick: () => act(() => api.revokeInvite(teamID, inv.id)),
+        })),
+    );
+  });
+
+  return h('div', { class: 'card' },
+    h('h2', { text: 'Invites' }),
+    h('p', { class: 'muted small' },
+      'An invite link puts somebody in this team and lets them choose their ',
+      'own password. It lasts a week and can be used once.'),
+    rows.length > 0 && h('table', { class: 'admin-table' }, h('tbody', {}, rows)),
+    form,
+    // Shown once and never stored, so it goes on the page to be copied.
+    freshInvite && h('p', { class: 'invite-out' },
+      h('strong', { text: 'Send them this link. It is shown once.' }),
+      h('code', { class: 'invite-link', text: freshInvite })),
+  );
+}
+
+// Why a link no longer works, in the server's own order of precedence: revoked
+// beats spent beats expired. Only 'live' is still usable.
+function inviteState(inv) {
+  if (inv.revoked) return 'revoked';
+  if (inv.uses >= inv.max_uses) return 'used up';
+  if (new Date(inv.expires_at).getTime() <= Date.now()) return 'expired';
+  return 'live';
+}
+
+// --- delete ----------------------------------------------------------------
+
+function dangerCard() {
+  const t = data.team;
+  const blocked = t.open_incidents > 0;
+  return h('div', { class: 'card' },
+    h('h2', { text: 'Delete' }),
+    h('p', { class: 'muted small' },
+      'Its alerts, incidents, schedule and integrations go with it. This ',
+      'cannot be undone. Everybody in it keeps their account and stays in ',
+      'whatever other teams they are in.'),
+    h('button', {
+      class: 'btn btn-danger', type: 'button', text: `Delete ${t.name}`,
+      // Saying so before the click is kinder than a 409 afterwards.
+      disabled: blocked,
+      title: blocked ? 'Resolve its open incidents first' : '',
+      onclick: deleteTeam,
+    }),
+  );
+}
+
+async function deleteTeam() {
+  if (!(await confirm({
+    title: `Delete ${data.team.name}?`,
+    text: 'Its alerts, incidents, schedule and integrations go with it. This cannot be undone.',
+    confirmLabel: 'Delete',
+    danger: true,
+  }))) return;
+  try {
+    await api.deleteTeam(teamID);
+  } catch (err) {
+    error = err.message;
+    render();
+    return;
+  }
+  toast('Team deleted.');
+  // Not act(): there is no longer a page here to refresh.
+  navigate('/admin/teams');
+}
+
+// --- plumbing --------------------------------------------------------------
+
+// act runs a write and reloads. Errors are shown rather than thrown away: the
+// 409 from the last-owner guard, and the one for a duplicate name, are the
+// server explaining itself, and the reader needs to see it.
+async function act(fn) {
+  if (busy) return;
+  busy = true;
+  try {
+    await fn();
+    error = null;
+  } catch (err) {
+    error = err.message;
+  } finally {
+    busy = false;
+  }
+  await refresh();
+}
@@ -0,0 +1,294 @@
+// One person, at /admin/users/{id}: what they are, what they are in, and the
+// levers an administrator has over the account.
+//
+// A section of its own rather than an expanding row in the Admin tab's table,
+// because memberships and the account actions together are more than a row can
+// hold and still be read on a phone.
+//
+// Like the Admin tab, this hides nothing the server would allow and shows
+// nothing it would refuse: every write here is an endpoint that answers 403
+// without the flag, so the view is a description of the rules rather than an
+// enforcement of them.
+
+import * as api from './api.js';
+import { h, clear, spinner, confirm, toast, icon } from './ui.js';
+import { state, myID } from './state.js';
+import { navigate } from './app.js';
+import { when } from './format.js';
+
+const view = () => document.getElementById('view-adminuser');
+
+let userID = null;
+let data = null; // { user, teams, allTeams }
+let error = null;
+let busy = false;
+
+export function show(route) {
+  const next = route && route.user != null ? route.user : null;
+  if (next !== userID) {
+    userID = next;
+    data = null;
+    error = null;
+  }
+  if (!data) clear(view(), spinner());
+  refresh();
+}
+
+export async function refresh() {
+  if (userID == null || !state.me?.user?.is_admin) {
+    render();
+    return;
+  }
+  try {
+    // The user comes from the list rather than a show endpoint: there is no
+    // GET /api/users/{id}, and adding one for a row the list already carries
+    // would be a second way to say the same thing.
+    const [users, teams, allTeams] = await Promise.all([
+      api.users(),
+      api.userTeams(userID),
+      api.adminTeams(),
+    ]);
+    const user = users.find((u) => u.id === userID) || null;
+    data = { user, teams, allTeams };
+    error = null;
+  } catch (err) {
+    error = err.message;
+  }
+  render();
+}
+
+function render() {
+  const el = view();
+  if (!state.me?.user?.is_admin) {
+    clear(el, backLink(), h('div', { class: 'card' },
+      h('p', { class: 'muted', text: 'Administration is for system administrators. Ask one for access.' })));
+    return;
+  }
+  if (!data) {
+    clear(el, backLink(), error ? h('div', { class: 'load-error', text: error }) : spinner());
+    return;
+  }
+  if (!data.user) {
+    clear(el, backLink(), h('div', { class: 'card' },
+      h('p', { class: 'muted', text: 'No such user. They may have just been deleted.' })));
+    return;
+  }
+  clear(el,
+    backLink(),
+    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
+    identityCard(),
+    teamsCard(),
+    accountCard(),
+  );
+}
+
+function backLink() {
+  return h('a', { class: 'back-link', href: '/admin/users' }, icon('chevronLeft'), h('span', { text: 'Users' }));
+}
+
+// --- identity --------------------------------------------------------------
+
+function identityCard() {
+  const u = data.user;
+  const self = u.id === myID();
+
+  return h('div', { class: 'card' },
+    h('div', { class: 'user-head' },
+      h('h2', { text: u.username }),
+      u.is_admin && h('span', { class: 'row-team', text: 'admin' }),
+      u.disabled_at && h('span', { class: 'row-team', text: 'disabled' }),
+      self && h('span', { class: 'you', text: 'you' })),
+    h('dl', { class: 'user-facts' },
+      fact('Email', u.email),
+      fact('Joined', when(u.created_at)),
+      fact('Notifications', u.ntfy_topic ? `ntfy: ${u.ntfy_topic}` : 'None of their own'),
+      u.disabled_at && fact('Disabled', when(u.disabled_at)),
+    ),
+    // Both of these refuse your own account, and the last administrator's. An
+    // enabled button that always fails is worse than no button.
+    h('div', { class: 'row-actions' },
+      !self && h('button', {
+        class: 'btn', type: 'button',
+        text: u.is_admin ? 'Revoke admin' : 'Make admin',
+        onclick: () => setAdmin(!u.is_admin),
+      }),
+      !self && h('button', {
+        class: 'btn', type: 'button',
+        text: u.disabled_at ? 'Enable account' : 'Disable account',
+        onclick: () => setDisabled(!u.disabled_at),
+      }),
+    ),
+    self && h('p', { class: 'muted small' },
+      'You cannot change your own administrator flag or disable yourself — ',
+      'that is how an install ends up with nobody who can administer it.'),
+  );
+}
+
+function fact(label, value) {
+  return [h('dt', { text: label }), h('dd', { text: value })];
+}
+
+async function setAdmin(next) {
+  if (next && !(await confirm({
+    title: `Make ${data.user.username} an administrator?`,
+    text: 'They will be able to manage every account, configure any team, and grant this to others.',
+    confirmLabel: 'Make admin',
+  }))) return;
+  await act(() => api.setUserAdmin(userID, next));
+}
+
+async function setDisabled(next) {
+  if (next && !(await confirm({
+    title: `Disable ${data.user.username}?`,
+    text: 'They cannot sign in and their API keys stop working. Their acknowledgements and timeline entries stay.',
+    confirmLabel: 'Disable',
+    danger: true,
+  }))) return;
+  await act(() => api.setUserDisabled(userID, next));
+}
+
+// --- teams -----------------------------------------------------------------
+
+// An administrator passes every team-owner check without being in the team,
+// which is what lets them repair a team whose owner has left. So this card
+// edits, rather than reporting what somebody else would have to do.
+//
+// It is the one place membership can be changed from the person's side: the
+// Team tab asks "who is in this team", and answering "which teams is this
+// person in" there means visiting each team in turn.
+function teamsCard() {
+  const rows = data.teams.map((t) =>
+    h('tr', {},
+      // Not a link: the Team tab always shows the viewer's own team, so
+      // sending them there from somebody else's membership would be a lie.
+      h('td', {}, h('strong', { text: t.name })),
+      h('td', { class: 'muted small', text: t.role }),
+      h('td', { class: 'row-actions' },
+        h('button', {
+          class: 'btn-sm', type: 'button',
+          text: t.role === 'owner' ? 'Make member' : 'Make owner',
+          onclick: () => act(() =>
+            api.addTeamMember(t.id, userID, t.role === 'owner' ? 'member' : 'owner')),
+        }),
+        h('button', {
+          class: 'btn-sm danger', type: 'button', text: 'Remove',
+          // The server refuses the last owner with a 409, which act() shows.
+          onclick: () => act(() => api.removeTeamMember(t.id, userID)),
+        }),
+      ),
+    ));
+
+  const inTeam = new Set(data.teams.map((t) => t.id));
+  const candidates = (data.allTeams || []).filter((t) => !inTeam.has(t.id));
+  const pick = h('select', {},
+    ...candidates.map((t) => h('option', { value: String(t.id), text: t.name })));
+  const role = h('select', {},
+    h('option', { value: 'member', text: 'member' }),
+    h('option', { value: 'owner', text: 'owner' }));
+  const form = h('form', { class: 'inline-form' }, pick, role,
+    h('button', { class: 'btn', type: 'submit', text: 'Add' }));
+  form.addEventListener('submit', (e) => {
+    e.preventDefault();
+    act(() => api.addTeamMember(Number(pick.value), userID, role.value));
+  });
+
+  return h('div', { class: 'card' },
+    h('h2', { text: 'Teams' }),
+    data.teams.length === 0 && h('p', { class: 'muted small' },
+      'In no team. They can sign in, but there is no queue for them to work ',
+      'and nothing to page them about.'),
+    data.teams.length > 0 && h('table', { class: 'admin-table' }, h('tbody', {}, rows)),
+    candidates.length > 0 && form,
+  );
+}
+
+// --- account ---------------------------------------------------------------
+
+function accountCard() {
+  const u = data.user;
+  const self = u.id === myID();
+
+  const pw = h('input', {
+    type: 'password', name: 'password', autocomplete: 'new-password',
+    minlength: '10', required: true, placeholder: 'At least 10 characters',
+  });
+  const form = h('form', { class: 'inline-form' }, pw,
+    h('button', { class: 'btn', type: 'submit', text: 'Set password' }));
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    if (busy) return;
+    busy = true;
+    try {
+      // No current password: that check is for changing your own, and an
+      // administrator setting somebody else's does not know it by design.
+      await api.setPassword(userID, pw.value);
+      pw.value = '';
+      toast(`Password set for ${u.username}. Their other sessions are signed out.`);
+      error = null;
+    } catch (err) {
+      error = err.message;
+    } finally {
+      busy = false;
+    }
+    await refresh();
+  });
+
+  return h('div', { class: 'card' },
+    h('h2', { text: 'Account' }),
+    h('p', { class: 'muted small' },
+      'Setting a password here is how somebody gets their first one, or a new ',
+      'one after forgetting it. It signs them out everywhere else. They change ',
+      'it themselves under Account afterwards.'),
+    self ? h('p', { class: 'muted small' },
+      'Change your own password under Account, where the current one is asked for.')
+      : form,
+    h('h3', { text: 'Delete' }),
+    h('p', { class: 'muted small' },
+      'Deleting erases their acknowledgements and timeline entries — incidents ',
+      'they handled stop saying who did. Disabling keeps the history and is ',
+      'almost always what is meant.'),
+    h('button', {
+      class: 'btn btn-danger', type: 'button', text: `Delete ${u.username}`,
+      disabled: self,
+      title: self ? 'You cannot delete your own account' : '',
+      onclick: deleteUser,
+    }),
+  );
+}
+
+async function deleteUser() {
+  if (!(await confirm({
+    title: `Delete ${data.user.username}?`,
+    text: 'Their API keys go with them, and their name comes off every incident they acknowledged. This cannot be undone.',
+    confirmLabel: 'Delete',
+    danger: true,
+  }))) return;
+  try {
+    await api.deleteUser(userID);
+  } catch (err) {
+    error = err.message;
+    render();
+    return;
+  }
+  toast('User deleted.');
+  navigate('/admin/users');
+}
+
+// --- plumbing --------------------------------------------------------------
+
+// act runs a write and reloads. Errors are shown rather than thrown away: the
+// 409 from the last-owner or last-administrator guard is the server explaining
+// itself, and the reader needs to see it.
+async function act(fn) {
+  if (busy) return;
+  busy = true;
+  try {
+    await fn();
+    error = null;
+  } catch (err) {
+    error = err.message;
+  } finally {
+    busy = false;
+  }
+  await refresh();
+}
@@ -67,6 +67,15 @@ export const setPassword = (userID, password, currentPassword) =>
 // users
 export const users = () => call('GET', '/users');

+// What one person is in. /teams answers "what am I in" and cannot be asked
+// about anybody else, which is what the admin page's per-user view needs.
+export const userTeams = (id) => call('GET', `/users/${id}/teams`);
+
+// Where this user's pages go. An empty topic clears it, which the server
+// treats as "no topic of their own" rather than an error.
+export const setNotifyTarget = (id, ntfyTopic) =>
+  call('PUT', `/users/${id}/notify`, { body: { ntfy_topic: ntfyTopic } });
+
 // incidents
 export const incidents = (query, opts) => call('GET', '/incidents', { query, ...opts });
 export const incident = (id) => call('GET', `/incidents/${id}`);
@@ -74,19 +83,40 @@ export const timeline = (id) => call('GET', `/incidents/${id}/timeline`);

 export const acknowledge = (id) => call('POST', `/incidents/${id}/acknowledge`);
 export const unacknowledge = (id) => call('DELETE', `/incidents/${id}/acknowledge`);
-export const resolve = (id) => call('POST', `/incidents/${id}/resolve`);
+export const resolve = (id, resolution) => call('POST', `/incidents/${id}/resolve`, resolution ? { body: { resolution } } : {});
 export const assign = (id, userID) => call('POST', `/incidents/${id}/assign`, { body: { user_id: userID } });
 export const snooze = (id, spec) => call('POST', `/incidents/${id}/snooze`, { body: spec });
 export const unsnooze = (id) => call('DELETE', `/incidents/${id}/snooze`);
 export const archive = (id) => call('POST', `/incidents/${id}/archive`);
 export const unarchive = (id) => call('DELETE', `/incidents/${id}/archive`);
-export const addNote = (id, content) => call('POST', `/incidents/${id}/notes`, { body: { content } });
+export const addNote = (id, content, pinned = false) => call('POST', `/incidents/${id}/notes`, { body: { content, pinned } });
+export const similar = (id) => call('GET', `/incidents/${id}/similar`);
 export const deleteNote = (id, eventID) => call('DELETE', `/incidents/${id}/notes/${eventID}`);

+// stats
+export const statsIncidents = (query) => call('GET', '/stats/incidents', { query });
+export const statsTop = (query) => call('GET', '/stats/alerts/top', { query });
+export const statsByHour = (query) => call('GET', '/stats/alerts/by-hour', { query });
+export const statsByDay = (query) => call('GET', '/stats/alerts/by-day', { query });
+
 // alerts
 export const alerts = (query, opts) => call('GET', '/alerts', { query, ...opts });

 // schedule
+// Sign-up, both halves unauthenticated: the caller has no account yet.
+export const signupInfo = (invite) =>
+  call('GET', '/signup', { query: invite ? { invite } : {} });
+export const signup = (body) => call('POST', '/signup', { body });
+
+export const invites = (id) => call('GET', `/teams/${id}/invites`);
+export const createInvite = (id, role, maxUses) =>
+  call('POST', `/teams/${id}/invites`, { body: { role, max_uses: maxUses } });
+export const revokeInvite = (id, inviteID) => call('DELETE', `/teams/${id}/invites/${inviteID}`);
+
+export const testNotification = () => call('POST', '/me/notify/test');
+export const dismissOnboarding = (dismissed) =>
+  call('PUT', '/me/onboarding', { body: { dismissed } });
+
 export const teams = () => call('GET', '/teams');
 export const createTeam = (name) => call('POST', '/teams', { body: { name } });
 export const renameTeam = (id, name) => call('PUT', `/teams/${id}`, { body: { name } });
@@ -106,8 +136,11 @@ export const createIntegration = (id, name) =>
 export const deleteIntegration = (id, integrationID) =>
  call('DELETE', `/teams/${id}/integrations/${integrationID}`);

-export const deadman = (id) => call('GET', `/teams/${id}/deadman`);
-export const setDeadman = (id, body) => call('PUT', `/teams/${id}/deadman`, { body });
+export const deadmanSwitches = (id) => call('GET', `/teams/${id}/deadman/switches`);
+export const createDeadmanSwitch = (id, body) =>
+  call('POST', `/teams/${id}/deadman/switches`, { body });
+export const deleteDeadmanSwitch = (id, switchID) =>
+  call('DELETE', `/teams/${id}/deadman/switches/${switchID}`);

 export const escalation = (id) => call('GET', `/teams/${id}/escalation`);
 export const setEscalation = (id, body) => call('PUT', `/teams/${id}/escalation`, { body });
@@ -119,12 +152,17 @@ export const unassignSchedule = (id, entryID) => call('DELETE', `/teams/${id}/sc
 // Administration. Every one of these is refused with 403 for anybody without
 // the flag, so the UI hides the section rather than guarding it.
 export const adminTeams = () => call('GET', '/admin/teams');
+// One team and who is in it: { team, members }. /teams/{id}/members is
+// member-only and answers 404 to an administrator from outside the team, which
+// is the rule rather than an oversight -- this asks the other question.
+export const adminTeam = (id) => call('GET', `/admin/teams/${id}`);
 export const adminSettings = () => call('GET', '/admin/settings');
 export const setAdminSettings = (body) => call('PUT', '/admin/settings', { body });
 export const setUserAdmin = (id, isAdmin) =>
  call('PUT', `/users/${id}/admin`, { body: { is_admin: isAdmin } });
 export const setUserDisabled = (id, disabled) =>
  call('PUT', `/users/${id}/disabled`, { body: { disabled } });
+export const deleteUser = (id) => call('DELETE', `/users/${id}`);
 export const schedule = (teamID, from, to) =>
  call('GET', `/teams/${teamID}/schedule`, { query: { from, to } });

@@ -8,30 +8,74 @@ import * as queue from './queue.js';
 import * as incident from './incident.js';
 import * as oncall from './oncall.js';
 import * as alerts from './alerts.js';
+import * as stats from './stats.js';
 import * as account from './account.js';
 import * as team from './team.js';
 import * as admin from './admin.js';
+import * as adminuser from './adminuser.js';
+import * as adminteam from './adminteam.js';

 const $ = (id) => document.getElementById(id);

-// One route per section; /incidents/{id} is the queue with a detail open.
+// One route per section; /incidents/{id} is the queue with a detail open, and
+// /admin/users/{id} is a section of its own rather than a mode of the Admin
+// tab, because it replaces the page rather than opening beside it.
 const SECTIONS = {
  queue: { title: 'Queue', view: queue },
  oncall: { title: 'On-call', view: oncall },
  alerts: { title: 'Alerts', view: alerts },
+  stats: { title: 'Stats', view: stats },
  team: { title: 'Team', view: team },
  admin: { title: 'Admin', view: admin },
+  adminuser: { title: 'User', view: adminuser, nav: 'admin' },
+  adminteam: { title: 'Team', view: adminteam, nav: 'admin' },
  more: { title: 'Account', view: account },
 };

+// The mobile hamburger menu's contents — the same sections the desktop
+// sidebar's .nav-link list carries in index.html, in the same order.
+const NAV_ITEMS = [
+  { path: '/', section: 'queue', label: 'Queue', icon: 'queueList' },
+  { path: '/oncall', section: 'oncall', label: 'On-call', icon: 'calendar' },
+  { path: '/alerts', section: 'alerts', label: 'Alerts', icon: 'bell' },
+  { path: '/stats', section: 'stats', label: 'Stats', icon: 'chart' },
+  { path: '/team', section: 'team', label: 'Team', icon: 'team' },
+  { path: '/admin', section: 'admin', label: 'Admin', icon: 'shield', adminOnly: true },
+  { path: '/more', section: 'more', label: 'Account', icon: 'user' },
+];
+
 function parseRoute(pathname) {
  const m = pathname.match(/^\/incidents\/(\d+)\/?$/);
  if (m) return { section: 'queue', incident: Number(m[1]) };
+  const u = pathname.match(/^\/admin\/users\/(\d+)\/?$/);
+  if (u) return { section: 'adminuser', user: Number(u[1]) };
+  // Before the TABS lookup below, which matches a path exactly and would let
+  // /admin/teams/7 fall through to the queue.
+  const g = pathname.match(/^\/admin\/teams\/(\d+)\/?$/);
+  if (g) return { section: 'adminteam', team: Number(g[1]) };
  const name = pathname.replace(/^\/|\/$/g, '');
-  if (name === 'oncall' || name === 'alerts' || name === 'team' || name === 'admin' || name === 'more') return { section: name };
+  // The Admin and Team tabs' sub-sections are routes of their own. Each view
+  // owns the table of its own, since each also builds the strip that links to
+  // them; /team is in team.TABS as the overview, so it is matched here too.
+  const t = admin.TABS.find((x) => x.path === `/${name}`);
+  if (t) return { section: 'admin', tab: t.tab };
+  const tt = team.TABS.find((x) => x.path === `/${name}`);
+  if (tt) return { section: 'team', tab: tt.tab };
+  if (name === 'oncall' || name === 'alerts' || name === 'stats' || name === 'more') return { section: name };
  return { section: 'queue', incident: null };
 }

+// What the top bar and the document title call this route. The sub-sections of
+// Admin and Team are pages in their own right, so they say which one rather
+// than the tab's name four or six times; either overview keeps the tab's own
+// name. A tab may carry a `title` where its strip label is too short to name a
+// page on its own.
+function title(r) {
+  const tabs = r.section === 'admin' ? admin.TABS : r.section === 'team' ? team.TABS : null;
+  const t = tabs && r.tab ? tabs.find((x) => x.tab === r.tab) : null;
+  return t ? (t.title || t.label) : SECTIONS[r.section].title;
+}
+
 let route = parseRoute(location.pathname);
 // How many in-app navigations deep we are, so Back can use the browser's
 // history when there is somewhere to go back to, and the queue otherwise.
@@ -64,13 +108,16 @@ function render() {
  route = parseRoute(location.pathname);
  const app = $('app');

-  for (const [name, s] of Object.entries(SECTIONS)) {
+  for (const name of Object.keys(SECTIONS)) {
    const el = $(`view-${name}`);
    el.hidden = name !== route.section;
-    if (name === route.section) $('topbar-title').textContent = s.title;
+    if (name === route.section) $('topbar-title').textContent = title(route);
  }
+  // A section may light up somebody else's tab: /admin/users/{id} is still the
+  // Admin tab as far as the nav is concerned, since there is no tab of its own.
+  const current = SECTIONS[route.section].nav || route.section;
  for (const link of document.querySelectorAll('.nav-link')) {
-    if (link.dataset.section === route.section) link.setAttribute('aria-current', 'page');
+    if (link.dataset.section === current) link.setAttribute('aria-current', 'page');
    else link.removeAttribute('aria-current');
  }

@@ -85,16 +132,49 @@ function render() {
    incident.show(route.incident);
  } else {
    incident.show(null);
-    SECTIONS[route.section].view.show();
+    SECTIONS[route.section].view.show(route);
  }

  if (detailOpen && !wasOpen) window.scrollTo(0, 0);
  else if (!detailOpen && wasOpen) requestAnimationFrame(() => window.scrollTo(0, listScroll));
-  else if (prev.section !== route.section) window.scrollTo(0, 0);
+  // A changed tab counts as a changed page: stepping from a long user list to
+  // the settings should not land you halfway down them. So does a changed
+  // subject — one team to the next is two pages, not one scrolled page.
+  else if (prev.section !== route.section || prev.tab !== route.tab
+    || prev.user !== route.user || prev.team !== route.team) window.scrollTo(0, 0);

  updateTitle();
 }

+// ---------- nav menu ----------
+
+// The mobile hamburger menu: same shape as the sheet-based action menus in
+// incident.js (openSheet + a <ul class="menu"> of menu-item buttons), one
+// item per NAV_ITEMS entry, resolving with a path for navigate() to use.
+function openNavMenu() {
+  const current = SECTIONS[route.section].nav || route.section;
+  const triggered = state.open.filter((i) => i.status === 'triggered').length;
+  const items = NAV_ITEMS.filter((n) => !n.adminOnly || state.me?.user?.is_admin);
+  ui.openSheet(() => [
+    ui.h('h2', { class: 'sheet-title', text: 'Sections' }),
+    ui.h('ul', { class: 'menu', role: 'menu' }, items.map((n) =>
+      ui.h('li', {}, ui.h('button', {
+        class: 'menu-item',
+        type: 'button',
+        role: 'menuitemradio',
+        'aria-checked': String(n.section === current),
+        onclick: () => ui.closeSheet(n.path),
+      },
+        ui.icon(n.icon),
+        n.label,
+        n.section === 'queue' && triggered > 0 && ui.badge(String(triggered), 'st-triggered menu-sub'),
+      ))),
+    ),
+  ]).then((path) => {
+    if (path) navigate(path);
+  });
+}
+
 // ---------- refresh + badges ----------

 async function refresh() {
@@ -121,15 +201,18 @@ function updateBadges() {
  pill.classList.toggle('has-triggered', triggered > 0);
  pill.classList.toggle('all-acked', open > 0 && triggered === 0);

-  const badge = document.querySelector('[data-badge]');
-  badge.hidden = triggered === 0;
-  badge.textContent = String(triggered);
+  // Two badges carry this count: the sidebar's Queue tab (desktop) and the
+  // hamburger button (mobile) — only one of the two is ever visible at once.
+  for (const badge of document.querySelectorAll('[data-badge]')) {
+    badge.hidden = triggered === 0;
+    badge.textContent = String(triggered);
+  }
  updateTitle();
 }

 function updateTitle() {
  const triggered = state.open.filter((i) => i.status === 'triggered').length;
-  const section = SECTIONS[route.section].title;
+  const section = title(route);
  const base = route.section === 'queue' && route.incident == null ? 'terdut' : `${section} · terdut`;
  document.title = triggered ? `(${triggered}) ${base}` : base;
 }
@@ -142,6 +225,15 @@ async function boot() {
  document.addEventListener('click', interceptLinks);
  document.addEventListener('keydown', onKey);
  $('login-form').addEventListener('submit', onLogin);
+  $('signup-form').addEventListener('submit', onSignup);
+  $('menu-btn').addEventListener('click', openNavMenu);
+
+  // /signup is the one route that works without a session.
+  if (location.pathname.replace(/\/$/, '') === '/signup') {
+    $('boot').hidden = true;
+    await showSignup();
+    return;
+  }

  try {
    state.me = await api.me();
@@ -161,6 +253,84 @@ function showBootError(err) {
  $('boot').append(ui.h('button', { class: 'btn', onclick: () => location.reload(), text: 'Retry' }));
 }

+// The sign-up screen. Reached at /signup, with an optional ?invite= that the
+// server has already judged — the form says whether the link is good before
+// somebody picks a password, rather than after.
+async function showSignup() {
+  poll.stop();
+  ui.closeSheet(null);
+  reset();
+  $('boot').hidden = true;
+  $('app').hidden = true;
+  $('login').hidden = false;
+  $('login-form').hidden = true;
+  $('signup-form').hidden = false;
+
+  const invite = new URLSearchParams(location.search).get('invite');
+  const intro = $('signup-intro');
+  const form = $('signup-form');
+  const teamLabel = $('signup-team-label');
+  form.querySelector('.form-error').hidden = true;
+
+  let info;
+  try {
+    info = await api.signupInfo(invite);
+  } catch (err) {
+    intro.textContent = err.message;
+    return;
+  }
+
+  if (invite && info.invite_valid) {
+    intro.textContent = `You have been invited to ${info.invite_team}.`;
+    teamLabel.hidden = true;
+    form.team_name.required = false;
+  } else if (invite) {
+    // One answer for expired, revoked, used up and never existed, matching the
+    // server: which it was is not a stranger's business.
+    intro.textContent = 'That invite link is not usable. Ask whoever sent it for a new one.';
+    form.querySelector('button[type=submit]').disabled = true;
+  } else if (info.mode === 'open') {
+    intro.textContent = 'Create an account and a team to put your alerts in.';
+    teamLabel.hidden = false;
+    form.team_name.required = true;
+  } else {
+    intro.textContent = 'Sign-up on this server is invite-only. Ask a team owner for a link.';
+    form.querySelector('button[type=submit]').disabled = true;
+  }
+  form.username.focus();
+}
+
+async function onSignup(e) {
+  e.preventDefault();
+  const form = e.currentTarget;
+  const err = form.querySelector('.form-error');
+  const btn = form.querySelector('button[type=submit]');
+  err.hidden = true;
+  btn.disabled = true;
+  try {
+    state.me = await api.signup({
+      username: form.username.value.trim(),
+      email: form.email.value.trim(),
+      password: form.password.value,
+      invite: new URLSearchParams(location.search).get('invite') || undefined,
+      team_name: form.team_name.value.trim() || undefined,
+    });
+    form.password.value = '';
+    // Signing up signs you in, so go straight to the queue rather than to a
+    // login form asking for the credential just chosen.
+    history.replaceState({ depth: 0 }, '', '/');
+    route = parseRoute('/');
+    await loadTeams();
+    $('nav-admin').hidden = !state.me?.user?.is_admin;
+    showApp();
+  } catch (ex) {
+    err.textContent = ex.message;
+    err.hidden = false;
+  } finally {
+    btn.disabled = false;
+  }
+}
+
 function showLogin() {
  poll.stop();
  ui.closeSheet(null);
@@ -168,8 +338,15 @@ function showLogin() {
  $('boot').hidden = true;
  $('app').hidden = true;
  $('login').hidden = false;
+  $('signup-form').hidden = true;
+  $('login-form').hidden = false;
  const form = $('login-form');
  form.querySelector('.form-error').hidden = true;
+  // Only offer the door that is open. Somebody without an invite on an
+  // invite-only server should be told, not sent to a form that refuses them.
+  api.signupInfo().then((info) => {
+    $('signup-link').hidden = info.mode !== 'open';
+  }).catch(() => {});
  form.password.value = '';
  (form.username.value ? form.password : form.username).focus();
 }
@@ -17,6 +17,7 @@ const pane = () => document.getElementById('detail');
 let currentID = null;
 let inc = null;
 let events = [];
+let similarList = [];
 let error = null;
 let busy = false;

@@ -38,10 +39,15 @@ export async function refresh() {
  const id = currentID;
  if (id == null) return;
  try {
-    const [i, t] = await Promise.all([api.incident(id), api.timeline(id)]);
+    // Similar incidents are a courtesy: an older server answers 404 and a
+    // failure here must not hide the incident itself.
+    const [i, t, sim] = await Promise.all([
+      api.incident(id), api.timeline(id), api.similar(id).catch(() => []),
+    ]);
    if (id !== currentID) return;
    inc = i;
    events = t;
+    similarList = sim;
    error = null;
  } catch (err) {
    if (id !== currentID) return;
@@ -60,6 +66,8 @@ function render() {
    h('button', { class: 'btn btn-ghost btn-icon back', type: 'button', 'aria-label': 'Back to queue', onclick: back },
      icon('back')),
    h('span', { class: 'crumb', text: currentID != null ? `Incident #${currentID}` : '' }),
+    inc && h('button', { class: 'btn btn-ghost btn-icon copy', type: 'button', 'aria-label': 'Copy incident', title: 'Copy incident (y)', onclick: copyIncident },
+      icon('copy')),
  );

  if (!inc) {
@@ -81,6 +89,7 @@ function render() {
      facts(),
      groupLabels(),
      alertsSection(),
+      similarSection(),
      timelineSection(),
    ),
    actionBar(),
@@ -179,8 +188,9 @@ function alertItem(a) {

 // ---------- timeline ----------

-function eventText(ev) {
-  const person = ev.user_id != null ? who(ev.user_id, ev.username) : null;
+// named spells users out instead of "you", for text that leaves this page.
+function eventText(ev, named = false) {
+  const person = ev.user_id != null ? (named ? ev.username || 'someone' : who(ev.user_id, ev.username)) : null;
  const strong = (t) => h('span', { class: 'who', text: t || 'someone' });
  const alertName = () => {
    const a = (inc.alerts || []).find((x) => x.id === ev.alert_id);
@@ -197,6 +207,7 @@ function eventText(ev) {
    case 'unsnoozed': return [strong(person), ' ended the snooze'];
    case 'resolved': return person ? [strong(person), ' resolved the incident'] : ['Resolved: every alert stopped firing'];
    case 'note': return [strong(person), ' added a note'];
+    case 'resolution_note': return [strong(person), ' noted what fixed it'];
    case 'notified': {
      const to = person ? strong(person) : 'the fallback topic';
      if (ev.detail === 'reminder') return ['Reminder sent to ', to];
@@ -209,6 +220,22 @@ function eventText(ev) {
  }
 }

+// Earlier incidents with the same signature that someone left notes on, the
+// ones that recorded what fixed it first. Plain notes are on that incident's
+// own page.
+function similarSection() {
+  if (!similarList.length) return null;
+  return h('section', { class: 'section' },
+    h('h2', { class: 'section-title' }, h('span', { text: 'Seen before' })),
+    h('div', { class: 'card' },
+      h('ul', { class: 'similar' }, similarList.map((s) => h('li', { class: 'similar-item' },
+        h('a', { href: `/incidents/${s.id}`, text: `#${s.id} ${s.title}` }),
+        h('div', { class: 'sub', text: `${when(s.resolved_at)} · ${ago(s.resolved_at)}${s.note_count ? ` · ${s.note_count} note${s.note_count === 1 ? '' : 's'}` : ''}` }),
+        ...s.resolution_notes.map((n) => h('div', { class: 'note note-fix', text: n.detail || '' })),
+      )))),
+  );
+}
+
 function timelineSection() {
  const sorted = [...events].sort((a, b) => Date.parse(a.created_at) - Date.parse(b.created_at) || a.id - b.id);
  return h('section', { class: 'section' },
@@ -223,20 +250,116 @@ function timelineSection() {
  );
 }

+const isNote = (ev) => ev.type === 'note' || ev.type === 'resolution_note';
+
 function timelineItem(ev) {
-  const mine = ev.type === 'note' && ev.user_id === myID();
+  const mine = isNote(ev) && ev.user_id === myID();
  return h('li', { class: `tl-item tl-${ev.type}` },
    h('span', { class: 'tl-dot' }),
    h('div', { class: 'tl-body' },
      h('div', { class: 'tl-text' }, eventText(ev)),
      h('div', { class: 'tl-time', title: ev.created_at, text: `${when(ev.created_at)} · ${ago(ev.created_at)}` }),
-      ev.type === 'note' && h('div', { class: 'note', text: ev.detail || '' }),
+      isNote(ev) && h('div', { class: ev.type === 'resolution_note' ? 'note note-fix' : 'note', text: ev.detail || '' }),
      mine && h('div', { class: 'note-actions' },
        h('button', { class: 'btn btn-ghost btn-sm', type: 'button', onclick: () => deleteNote(ev) }, icon('trash'), 'Delete')),
    ),
  );
 }

+// ---------- copy ----------
+
+const fence = (rows) => ['```', ...rows, '```'];
+const pairs = (obj) => Object.entries(obj || {}).sort(([a], [b]) => a.localeCompare(b)).map(([k, v]) => `${k}=${v}`);
+
+// incidentMarkdown is everything on this page as text that reads well in a chat
+// or an agent prompt. Times are ISO 8601, since "3 min ago" means nothing once
+// it has been pasted somewhere else.
+function incidentMarkdown() {
+  const out = [`# Incident #${inc.id}: ${inc.title}`, ''];
+  const add = (k, v) => { if (v != null && v !== '') out.push(`- ${k}: ${v}`); };
+  add('Status', inc.status);
+  add('Severity', inc.severity);
+  add('Team', inc.team_name);
+  add('Assigned to', inc.assigned_to_id != null ? inc.assigned_to || 'someone' : 'unassigned');
+  add('Triggered', inc.triggered_at);
+  if (inc.acknowledged_at) add('Acknowledged', `${inc.acknowledged_at} by ${inc.acknowledged_by || 'someone'}`);
+  if (isOpen() && isFuture(inc.snoozed_until)) add('Snoozed until', inc.snoozed_until);
+  if (inc.escalation_level > 0) add('Escalation level', inc.escalation_level);
+  if (inc.resolved_at) add('Resolved', `${inc.resolved_at} (${inc.resolution_source === 'manual' ? 'manually' : 'all alerts stopped firing'})`);
+  if (inc.archived_at) add('Archived', inc.archived_at);
+  const group = pairs(inc.group_labels);
+  if (group.length) out.push('- Grouped by:', ...group.map((g) => `  - ${g}`));
+
+  const alerts = inc.alerts || [];
+  out.push('', `## Alerts (${alerts.length})`);
+  for (const a of alerts) {
+    out.push('', `### ${a.name} (${a.status})`);
+    out.push(`- Started: ${a.starts_at}`);
+    if (a.status === 'resolved' && a.ends_at) out.push(`- Ended: ${a.ends_at}`);
+    if (a.generator_url) out.push(`- Source: ${a.generator_url}`);
+    const labels = pairs(a.labels);
+    if (labels.length) out.push('', 'Labels:', ...fence(labels));
+    const annotations = Object.entries(a.annotations || {}).sort(([x], [y]) => x.localeCompare(y));
+    if (annotations.length) out.push('', 'Annotations:', ...fence(annotations.map(([k, v]) => `${k}: ${v}`)));
+  }
+
+  const sorted = [...events].sort((a, b) => Date.parse(a.created_at) - Date.parse(b.created_at) || a.id - b.id);
+  if (sorted.length) {
+    out.push('', '## Timeline', '');
+    for (const ev of sorted) {
+      const text = eventText(ev, true).map((f) => (f instanceof Node ? f.textContent : f)).join('');
+      out.push(`- ${ev.created_at} ${text}`);
+      if (isNote(ev) && ev.detail) {
+        const label = ev.type === 'resolution_note' ? '  (what fixed it)' : '';
+        out.push(...(label ? [label] : []), ...ev.detail.split('\n').map((l) => `  > ${l}`));
+      }
+    }
+  }
+
+  if (similarList.length) {
+    out.push('', '## Seen before', '', 'Earlier incidents with the same signature:');
+    for (const s of similarList) {
+      out.push(`- #${s.id} ${s.title} (resolved ${s.resolved_at})`);
+      for (const n of s.resolution_notes || []) {
+        out.push('  - What fixed it:', ...(n.detail || '').split('\n').map((l) => `    > ${l}`));
+      }
+    }
+  }
+
+  out.push('', `_Copied from Terminal Duty at ${new Date().toISOString()}_`, '');
+  return out.join('\n');
+}
+
+// writeClipboard falls back to execCommand: the async API needs a secure
+// context, and this server is often reached over plain HTTP.
+async function writeClipboard(text) {
+  try {
+    await navigator.clipboard.writeText(text);
+    return;
+  } catch {
+    // fall through
+  }
+  const ta = h('textarea', { readonly: true, 'aria-hidden': 'true', class: 'clip-buffer' });
+  ta.value = text;
+  document.body.append(ta);
+  ta.select();
+  try {
+    if (!document.execCommand('copy')) throw new Error('copy refused');
+  } finally {
+    ta.remove();
+  }
+}
+
+async function copyIncident() {
+  if (!inc) return;
+  try {
+    await writeClipboard(incidentMarkdown());
+    toast('Copied incident');
+  } catch {
+    toast('Could not copy', 'error');
+  }
+}
+
 // ---------- actions ----------

 const isOpen = () => inc.status !== 'resolved';
@@ -296,15 +419,35 @@ function unacknowledge() {

 async function resolve() {
  const id = inc.id;
-  const ok = await confirm({
-    title: 'Resolve this incident?',
-    text: 'Resolving is final. If these alerts fire again they open a new incident, '
-      + 'and if any are still firing this one stays closed regardless. '
-      + 'Use snooze if you only need it out of the way.',
-    confirmLabel: 'Resolve',
-    danger: true,
+  const res = await openSheet(() => {
+    const textarea = h('textarea', {
+      name: 'resolution', autofocus: true, maxlength: '10000',
+      placeholder: 'What fixed it? Optional, shown on the next similar incident.',
+    });
+    const form = h('form', {
+      class: 'sheet-form',
+      onsubmit: (e) => {
+        e.preventDefault();
+        closeSheet({ resolution: textarea.value.trim() });
+      },
+    },
+      h('h2', { class: 'sheet-title', text: 'Resolve this incident?' }),
+      h('p', {
+        text: 'Resolving is final. If these alerts fire again they open a new incident, '
+          + 'and if any are still firing this one stays closed regardless. '
+          + 'Use snooze if you only need it out of the way.',
+      }),
+      textarea,
+      h('div', { class: 'sheet-actions' },
+        h('button', { class: 'btn', type: 'button', onclick: () => closeSheet(null), text: 'Cancel' }),
+        h('button', { class: 'btn btn-danger', type: 'submit', text: 'Resolve' })),
+    );
+    textarea.addEventListener('keydown', (e) => {
+      if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) form.requestSubmit();
+    });
+    return form;
  });
-  if (ok) await run(() => api.resolve(id), 'Resolved');
+  if (res) await run(() => api.resolve(id, res.resolution), 'Resolved');
 }

 function archive() {
@@ -382,16 +525,18 @@ async function addNote() {
    const textarea = h('textarea', {
      name: 'content', required: true, autofocus: true, placeholder: 'What did you find? What did you do?', maxlength: '10000',
    });
+    const fix = h('input', { type: 'checkbox', name: 'fix' });
    const form = h('form', {
      class: 'sheet-form',
      onsubmit: (e) => {
        e.preventDefault();
        const v = textarea.value.trim();
-        if (v) closeSheet(v);
+        if (v) closeSheet({ content: v, pinned: fix.checked });
      },
    },
      h('h2', { class: 'sheet-title', text: 'Add note' }),
      textarea,
+      h('label', { class: 'check' }, fix, ' This is what fixed it (shown on similar incidents)'),
      h('div', { class: 'sheet-actions' },
        h('button', { class: 'btn', type: 'button', onclick: () => closeSheet(null), text: 'Cancel' }),
        h('button', { class: 'btn btn-primary', type: 'submit', text: 'Save note' })),
@@ -402,7 +547,7 @@ async function addNote() {
    });
    return form;
  });
-  if (content) await run(() => api.addNote(id, content), 'Note added');
+  if (content) await run(() => api.addNote(id, content.content, content.pinned), 'Note added');
 }

 async function deleteNote(ev) {
@@ -422,10 +567,12 @@ async function moreMenu() {
    items.push(item('user', 'Assign…', assign));
    items.push(isSnoozed() ? item('bell', 'End snooze', unsnooze) : item('clock', 'Snooze…', snooze));
    items.push(item('note', 'Add note…', addNote));
+    items.push(item('copy', 'Copy incident', copyIncident));
    items.push(h('li', { class: 'menu-sep', role: 'separator' }));
    items.push(item('checkCircle', 'Resolve…', resolve, 'danger'));
  } else {
    items.push(item('note', 'Add note…', addNote));
+    items.push(item('copy', 'Copy incident', copyIncident));
    items.push(inc.archived_at ? item('undo', 'Unarchive', unarchive) : item('archive', 'Archive', archive));
  }

@@ -454,6 +601,7 @@ export function key(e) {
    case 'z': if (isOpen() && !isSnoozed()) snooze(); return true;
    case 'Z': if (isSnoozed()) unsnooze(); return true;
    case 'c': addNote(); return true;
+    case 'y': copyIncident(); return true;
    case 'x': if (!isOpen()) (inc.archived_at ? unarchive() : archive()); return true;
    default: return false;
  }
@@ -0,0 +1,147 @@
+// The first-run checklist: the four things a new install or a new person has
+// to do before an alert reaches a phone.
+//
+// It is computed from what the server already knows rather than from stored
+// progress — a topic is set or it is not, an integration exists or it does not
+// — so it cannot claim a step is done when it is not, and it comes back by
+// itself if somebody deletes their integration a month later.
+//
+// Dismissal is the one piece of state, kept per user so finishing on a laptop
+// does not leave the phone nagging.
+
+import * as api from './api.js';
+import { h, clear, spinner } from './ui.js';
+import { state, currentTeam } from './state.js';
+import { navigate } from './app.js';
+import { isoDate } from './format.js';
+
+let steps = null;
+let error = null;
+let busy = false;
+let testResult = null;
+
+// done() is deliberately a question about the world, not a flag: each step asks
+// the data whether it happened.
+export async function load() {
+  const team = currentTeam();
+  if (!team) {
+    steps = null;
+    return;
+  }
+  try {
+    const [schedule, integrations, alerts] = await Promise.all([
+      api.schedule(team.id, isoDate(new Date()), isoDate(new Date())),
+      api.integrations(team.id),
+      api.alerts({ limit: 1 }),
+    ]);
+    steps = [
+      {
+        id: 'topic',
+        title: 'Set where your pages go',
+        text: 'An ntfy topic on your account. Without one, incidents assigned to you page the team’s fallback topic instead of your phone.',
+        done: Boolean(state.me?.user?.ntfy_topic),
+        action: { label: 'Account', go: '/more' },
+      },
+      {
+        id: 'rota',
+        title: 'Put somebody on call',
+        text: 'An incident opens assigned to whoever the rota says is on call today. With an empty rota it opens unassigned.',
+        done: (schedule || []).length > 0,
+        action: { label: 'Team', go: '/team' },
+      },
+      {
+        id: 'integration',
+        title: 'Create an alert source',
+        text: 'Alerts arrive on an integration key, which says which team they belong to. Nothing can reach this team without one.',
+        done: (integrations || []).length > 0,
+        action: { label: 'Team', go: '/team' },
+      },
+      {
+        id: 'alert',
+        title: 'Send a test alert',
+        text: 'Post to the integration URL and watch it appear in the queue. Until one arrives, none of the above is proven.',
+        done: (alerts || []).length > 0,
+        action: { label: 'How', go: '/team' },
+      },
+    ];
+    error = null;
+  } catch (err) {
+    error = err.message;
+  }
+}
+
+// visible reports whether there is anything worth showing: something undone,
+// and not dismissed.
+export function visible() {
+  if (!steps || state.me?.onboarding_dismissed) return false;
+  return steps.some((s) => !s.done);
+}
+
+export function card() {
+  if (!visible()) return null;
+  const remaining = steps.filter((s) => !s.done).length;
+
+  return h('div', { class: 'card onboarding' },
+    h('div', { class: 'onboarding-head' },
+      h('h2', { text: 'Finish setting up' }),
+      h('span', { class: 'muted small', text: `${remaining} left` }),
+      h('button', {
+        class: 'btn-sm', type: 'button', text: 'Hide',
+        title: 'Hide this checklist for good',
+        onclick: async () => {
+          try {
+            await api.dismissOnboarding(true);
+            if (state.me) state.me.onboarding_dismissed = true;
+          } catch (err) {
+            error = err.message;
+          }
+          rerender();
+        },
+      })),
+    error && h('p', { class: 'load-error', text: error }),
+    h('ol', { class: 'checklist' }, ...steps.map(stepRow)),
+    testResult && h('p', { class: testResult.ok ? 'muted small' : 'load-error', text: testResult.text }),
+  );
+}
+
+function stepRow(step) {
+  return h('li', { class: step.done ? 'step done' : 'step' },
+    h('span', { class: 'step-mark', text: step.done ? '✓' : '' }),
+    h('div', {},
+      h('strong', { text: step.title }),
+      h('p', { class: 'muted small', text: step.text }),
+      !step.done && h('div', { class: 'step-actions' },
+        h('button', {
+          class: 'btn-sm', type: 'button', text: step.action.label,
+          onclick: () => navigate(step.action.go),
+        }),
+        // The topic step is the only one this page can finish by itself, and
+        // the only proof that matters is a phone buzzing.
+        step.id === 'topic' && state.me?.user?.ntfy_topic && h('button', {
+          class: 'btn-sm', type: 'button', text: 'Send a test push',
+          disabled: busy,
+          onclick: sendTest,
+        }),
+      )),
+  );
+}
+
+async function sendTest() {
+  busy = true;
+  try {
+    await api.testNotification();
+    testResult = { ok: true, text: 'Sent. If nothing arrives, the topic is wrong or ntfy is not reachable.' };
+  } catch (err) {
+    testResult = { ok: false, text: err.message };
+  } finally {
+    busy = false;
+  }
+  rerender();
+}
+
+// The queue owns the card's place on the page, so ask it to redraw rather than
+// reaching into its list.
+let rerender = () => {};
+export function onRerender(fn) {
+  rerender = fn;
+}
@@ -4,6 +4,7 @@ import * as api from './api.js';
 import { h, clear, badge, emptyState, spinner } from './ui.js';
 import { age, until, isFuture, severityClass, labelSummary } from './format.js';
 import { state, myID } from './state.js';
+import * as onboarding from './onboarding.js';
 import { navigate } from './app.js';

 // The same filters as the TUI's `f` cycle, plus archived ones to get back to.
@@ -25,6 +26,8 @@ const EMPTY = {
  archived: ['Nothing archived', ''],
 };

+onboarding.onRerender(() => renderList());
+
 let filter = loadFilter();
 let teamFilter = loadTeamFilter(); // '' for every team the viewer is in
 let items = null; // null while loading
@@ -89,6 +92,7 @@ export async function refresh({ fresh = false } = {}) {
    const query = teamFilter ? { ...f.query, team_id: teamFilter } : f.query;
    const cached = filter === 'open' && !fresh && !teamFilter;
    const result = cached ? state.open : await api.incidents(query);
+    await onboarding.load();
    if (requested !== filter) return;
    items = result;
    error = null;
@@ -153,20 +157,22 @@ function renderChips() {

 function renderList() {
  const el = document.getElementById('queue-list');
+  const checklist = onboarding.card();
  if (error && !items) {
-    clear(el, h('div', { class: 'load-error', text: error }));
+    clear(el, checklist, h('div', { class: 'load-error', text: error }));
    return;
  }
  if (!items) {
-    clear(el, spinner());
+    clear(el, checklist, spinner());
    return;
  }
  if (!items.length) {
    const [title, text] = EMPTY[filter];
-    clear(el, emptyState(title, text, filter === 'open' ? 'checkCircle' : null));
+    clear(el, checklist, emptyState(title, text, filter === 'open' ? 'checkCircle' : null));
    return;
  }
  clear(el,
+    checklist,
    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
    items.map((inc, i) => row(inc, i)),
  );
@@ -0,0 +1,168 @@
+// Statistics: how many incidents, how fast they are answered, and when and
+// what the alerts are. The same figures the TUI's Stats tab shows, over a
+// range picked with the chips. The server scopes them to the caller's teams.
+
+import * as api from './api.js';
+import { h, clear, emptyState, spinner } from './ui.js';
+import { duration } from './format.js';
+
+const DAY_MS = 24 * 60 * 60 * 1000;
+
+// `days` counts back from today, inclusive; the server reads from/to as UTC
+// dates, so these are too.
+const RANGES = [
+  { id: 'today', label: 'Today', days: 1 },
+  { id: '7d', label: '7d', days: 7 },
+  { id: '30d', label: '30d', days: 30 },
+  { id: '90d', label: '90d', days: 90 },
+  { id: 'all', label: 'All', days: null },
+];
+
+const view = () => document.getElementById('view-stats');
+
+let range = '30d';
+let data = null;
+let error = null;
+
+const utcDate = (ms) => new Date(ms).toISOString().slice(0, 10);
+
+function query(r) {
+  if (!r.days) return {};
+  const now = Date.now();
+  return { from: utcDate(now - (r.days - 1) * DAY_MS), to: utcDate(now) };
+}
+
+export function show() {
+  render();
+  refresh();
+}
+
+export async function refresh() {
+  const requested = range;
+  const q = query(RANGES.find((x) => x.id === range));
+  try {
+    const [incidents, top, byHour, byDay] = await Promise.all([
+      api.statsIncidents(q),
+      api.statsTop({ ...q, limit: 10 }),
+      api.statsByHour(q),
+      api.statsByDay(q),
+    ]);
+    if (requested !== range) return;
+    data = { incidents, top, byHour, byDay };
+    error = null;
+  } catch (err) {
+    if (requested !== range) return;
+    error = err.message;
+  }
+  render();
+}
+
+function setRange(id) {
+  if (id === range) return;
+  range = id;
+  data = null;
+  render();
+  refresh();
+}
+
+function render() {
+  const chips = h('div', { class: 'chips', role: 'tablist', 'aria-label': 'Time range' },
+    RANGES.map((r) => h('button', {
+      class: 'chip',
+      type: 'button',
+      role: 'tab',
+      'aria-selected': String(r.id === range),
+      onclick: () => setRange(r.id),
+      text: r.label,
+    })));
+
+  let body;
+  if (error && !data) body = h('div', { class: 'load-error', text: error });
+  else if (!data) body = spinner();
+  else if (!data.incidents.total && !data.byHour.some((x) => x.count)) {
+    body = emptyState('No data in this range', '', 'chart');
+  } else {
+    body = h('div', { class: 'stats' },
+      error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
+      tiles(data.incidents),
+      data.top.length > 0 && card('Top alerts', topAlerts(data.top)),
+      card('Alerts by hour (UTC)', columns(
+        data.byHour.map((x) => ({ label: String(x.hour), value: x.count, tick: x.hour % 6 === 0 })),
+        'Alerts by hour of day')),
+      card('Alerts by day', columns(
+        data.byDay.map((x) => ({ label: x.day_name.slice(0, 3), value: x.count, tick: true })),
+        'Alerts by day of week')));
+  }
+  clear(view(), h('div', {}, chips, body));
+}
+
+// A missing mean means nothing has been acknowledged or resolved yet.
+const mean = (s) => (s == null ? '—' : duration(s * 1000));
+
+function tiles(s) {
+  const tile = (label, value, cls = '') => h('div', { class: `stat-tile ${cls}` },
+    h('div', { class: 'stat-value', text: String(value) }),
+    h('div', { class: 'stat-label', text: label }));
+  return h('div', { class: 'stat-tiles' },
+    tile('Incidents', s.total),
+    tile('Triggered', s.triggered, 'st-triggered'),
+    tile('Acknowledged', s.acknowledged, 'st-acknowledged'),
+    tile('Resolved', s.resolved, 'st-resolved'),
+    tile('Mean time to acknowledge', mean(s.mtta_seconds)),
+    tile('Mean time to resolve', mean(s.mttr_seconds)));
+}
+
+function card(title, content) {
+  return h('section', { class: 'chart-card card card-pad' },
+    h('h3', { class: 'chart-title', text: title }), content);
+}
+
+// Ranked names with a bar scaled to the busiest one.
+function topAlerts(items) {
+  const max = Math.max(...items.map((x) => x.count), 1);
+  return h('ol', { class: 'hbars' }, items.map((x) => {
+    const fill = h('span', { class: 'hbar-fill' });
+    fill.style.width = `${Math.max(2, (x.count / max) * 100)}%`;
+    return h('li', { class: 'hbar' },
+      h('span', { class: 'hbar-name', title: x.name, text: x.name }),
+      h('span', { class: 'hbar-track' }, fill),
+      h('span', { class: 'hbar-count', text: String(x.count) }));
+  }));
+}
+
+const SVG_NS = 'http://www.w3.org/2000/svg';
+
+function svg(tag, attrs = {}, text) {
+  const el = document.createElementNS(SVG_NS, tag);
+  for (const [k, v] of Object.entries(attrs)) el.setAttribute(k, String(v));
+  if (text != null) el.textContent = text;
+  return el;
+}
+
+// A column chart: one bar per item, the value in a tooltip, and a label under
+// the items marked `tick`.
+function columns(items, label) {
+  const W = 480;
+  const H = 140;
+  const base = H - 18;
+  const step = W / items.length;
+  const max = Math.max(...items.map((x) => x.value), 1);
+  const root = svg('svg', {
+    class: 'columns', viewBox: `0 0 ${W} ${H}`, role: 'img', 'aria-label': label,
+  });
+  root.appendChild(svg('line', { class: 'axis', x1: 0, x2: W, y1: base, y2: base }));
+  items.forEach((it, i) => {
+    const bh = it.value ? Math.max(2, (it.value / max) * (base - 6)) : 0;
+    const x = i * step + step * 0.15;
+    const g = svg('g', { class: 'col' });
+    g.appendChild(svg('title', {}, `${it.label}: ${it.value}`));
+    // A full-height transparent hit area, so a tiny bar is still hoverable.
+    g.appendChild(svg('rect', { class: 'col-hit', x: i * step, y: 0, width: step, height: base }));
+    if (bh) g.appendChild(svg('rect', { class: 'col-bar', x, y: base - bh, width: step * 0.7, height: bh, rx: 2 }));
+    root.appendChild(g);
+    if (it.tick) {
+      root.appendChild(svg('text', { class: 'col-label', x: i * step + step / 2, y: H - 4, 'text-anchor': 'middle' }, it.label));
+    }
+  });
+  return root;
+}
@@ -1,8 +1,16 @@
-// Team settings: the rota, who is in the team, where its alerts come from,
-// what it escalates through, and which of its alerts are heartbeats.
+// One team: the rota, who is in it, where its alerts come from, what it
+// escalates through, and which of its alerts are heartbeats.
 //
-// Everything here was API-only until now, which meant a team owner had to use
-// curl to set up escalation — the feature this whole line of work exists for.
+// Everything here was API-only until v0.12.0, which meant a team owner had to
+// use curl to set up escalation — the feature this whole line of work exists
+// for.
+//
+// Each of those five is a route of its own behind a strip across the top, with
+// /team an overview, the way 07914d5 split the Admin tab. The same reasons
+// applied here and more sharply: five cards on one page meant no way to link
+// somebody to the escalation ladder, no way to the switches but past a month
+// of rota, and a poll that refetched six endpoints however little of the page
+// you were looking at.
 //
 // The server decides what a role may do: an owner's edits succeed, a member's
 // are refused with 403, and a non-member gets 404 for the lot. This view hides
@@ -10,19 +18,48 @@
 // than no form, but it is not the thing enforcing anything.

 import * as api from './api.js';
-import { h, clear, spinner, confirm } from './ui.js';
-import { state, currentTeam, users as allUsers } from './state.js';
-import { isoDate, addDays } from './format.js';
+import { h, clear, spinner, confirm, icon, openSheet, closeSheet, menuCard, badge, labelChip } from './ui.js';
+import { state, currentTeam, users as allUsers, myID } from './state.js';
+import { isoDate, addDays, mondayOf, initial, ago, when, duration } from './format.js';

 const view = () => document.getElementById('view-team');

+// The sub-sections, in the order the strip shows them. The overview is /team
+// itself, so it has no tab of its own. This table is the only place the six
+// routes are written down: app.js parses against it and the strip is built
+// from it, the same contract admin.js has.
+//
+// `label` is what the strip says and `title` what the top bar and the document
+// title say, where a strip label alone would be too thin to name a page —
+// "Sources · terdut" in a browser tab does not say sources of what.
+export const TABS = [
+  { tab: null, path: '/team', label: 'Overview' },
+  { tab: 'rota', path: '/team/rota', label: 'Rota', title: 'On-call rota' },
+  { tab: 'members', path: '/team/members', label: 'Members' },
+  { tab: 'escalation', path: '/team/escalation', label: 'Escalation' },
+  { tab: 'sources', path: '/team/sources', label: 'Sources', title: 'Alert sources' },
+  { tab: 'deadman', path: '/team/deadman', label: 'Switches', title: 'Dead man’s switches' },
+];
+
 let teamID = null;
-let data = null; // { team, members, integrations, escalation, deadman, schedule, users }
+// Which sub-section is open. Remembered rather than passed, because the poll
+// loop calls refresh() with no route.
+let tab = null;
+let data = null; // { team, ... }; which fields are present varies by tab
 let error = null;
 let freshKey = null; // an integration key, shown once, until the view is left

-export function show() {
-  if (!data) clear(view(), spinner());
+export function show(route) {
+  const next = route?.tab ?? null;
+  // A different sub-section wants different data, so the old answer goes
+  // rather than being shown under the new heading until the fetch lands. The
+  // ladder draft goes with it: it is an edit of the page being left.
+  if (next !== tab) {
+    tab = next;
+    data = null;
+    draft = null;
+  }
+  if (!data) clear(view(), subnav(), spinner());
  refresh();
 }

@@ -40,16 +77,7 @@ export async function refresh() {
  }
  teamID = team.id;
  try {
-    // A member may read all of this; only the writes are owner-only.
-    const [members, integrations, escalation, deadman, schedule, users] = await Promise.all([
-      api.teamMembers(team.id),
-      api.integrations(team.id),
-      api.escalation(team.id),
-      api.deadman(team.id),
-      api.schedule(team.id, isoDate(new Date()), isoDate(addDays(new Date(), 30))),
-      allUsers(),
-    ]);
-    data = { team, members, integrations, escalation, deadman, schedule, users };
+    data = { team, ...(await load(team.id)) };
    error = null;
  } catch (err) {
    error = err.message;
@@ -57,6 +85,45 @@ export async function refresh() {
  render();
 }

+// Only what the open sub-section shows. A member may read all of it; only the
+// writes are owner-only.
+//
+// Three of the five need the member list besides their own endpoint, and for
+// the same reason each time: a rota, a ladder target and a role are all a
+// person, and the page has to be able to name them. The overview is the one
+// that fetches everything, because saying how much of each there is means
+// asking each of them.
+async function load(id) {
+  if (tab === 'rota') {
+    const grid = gridDays();
+    const [members, schedule] = await Promise.all([
+      api.teamMembers(id),
+      api.schedule(id, isoDate(grid.start), isoDate(addDays(grid.start, grid.count - 1))),
+    ]);
+    return { members, schedule };
+  }
+  if (tab === 'members') {
+    const [members, users] = await Promise.all([api.teamMembers(id), allUsers()]);
+    return { members, users };
+  }
+  if (tab === 'escalation') {
+    const [members, escalation] = await Promise.all([api.teamMembers(id), api.escalation(id)]);
+    return { members, escalation };
+  }
+  if (tab === 'sources') return { integrations: await api.integrations(id) };
+  if (tab === 'deadman') return { deadman: await api.deadmanSwitches(id) };
+
+  const grid = gridDays();
+  const [members, integrations, escalation, deadman, schedule] = await Promise.all([
+    api.teamMembers(id),
+    api.integrations(id),
+    api.escalation(id),
+    api.deadmanSwitches(id),
+    api.schedule(id, isoDate(grid.start), isoDate(addDays(grid.start, grid.count - 1))),
+  ]);
+  return { members, integrations, escalation, deadman, schedule };
+}
+
 function isOwner() {
  return data?.team?.role === 'owner' || state.me?.user?.is_admin;
 }
@@ -69,19 +136,43 @@ function render() {
    return;
  }
  clear(view(),
-    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
+    subnav(),
    teamPicker(),
-    !isOwner() && h('div', { class: 'card' },
+    // Said once on the overview rather than on all six pages: it explains why
+    // the controls further down are missing, and a page of nothing but the
+    // rota has no controls to explain.
+    !isOwner() && tab === null && h('div', { class: 'card' },
      h('p', { class: 'muted small', text: 'You are a member of this team. Only an owner can change its settings.' })),
-    scheduleCard(),
-    escalationCard(),
-    integrationsCard(),
-    deadmanCard(),
-    membersCard(),
+    error && h('div', { class: 'load-error', text: `Showing older data: ${error}` }),
+    section(),
  );
 }

+function section() {
+  if (tab === 'rota') return scheduleCard();
+  if (tab === 'members') return membersCard();
+  if (tab === 'escalation') return escalationCard();
+  if (tab === 'sources') return integrationsCard();
+  if (tab === 'deadman') return deadmanCard();
+  return overview();
+}
+
+// The strip across the top of every team page. Ordinary links rather than
+// buttons, because these are six URLs: app.js intercepts the click, the
+// browser's Back walks them, and a reload lands where you were.
+function subnav() {
+  return h('nav', { class: 'subnav', 'aria-label': 'Team' },
+    TABS.map((t) => h('a', {
+      class: 'subnav-link',
+      href: t.path,
+      text: t.label,
+      'aria-current': t.tab === tab ? 'page' : null,
+    })));
+}
+
 // Only shown to somebody in more than one team, like the queue's filter chips.
+// It is above the sections rather than inside one because it changes the
+// subject of all six.
 function teamPicker() {
  if ((state.teams || []).length < 2) {
    return h('div', { class: 'card' }, h('h2', { text: data.team.name }));
@@ -94,40 +185,246 @@ function teamPicker() {
    teamID = Number(select.value);
    data = null;
    freshKey = null;
-    show();
+    draft = null;
+    refresh();
  });
  return h('div', { class: 'card' }, h('h2', { text: 'Team' }), select);
 }

+// --- overview --------------------------------------------------------------
+
+// /team itself. The strip already links to the five, so this earns its place
+// the way /admin's does: by saying how much of each there is, which is the one
+// thing a menu cannot.
+function overview() {
+  const today = isoDate(new Date());
+  const onToday = (data.schedule || []).find((e) => e.date === today);
+  const owners = (data.members || []).filter((m) => m.role === 'owner').length;
+  const levels = (data.escalation?.levels || []).length;
+  const keys = (data.integrations || []).length;
+  const unused = (data.integrations || []).filter((i) => !i.last_used_at).length;
+  const switches = (data.deadman || []).length;
+  const dead = (data.deadman || []).filter((s) => s.status === 'dead').length;
+
+  return h('div', { class: 'overview-menu' },
+    menuCard('/team/rota', 'Rota', null,
+      onToday ? `${onToday.username} is on call today.` : 'Nobody is on call today.'),
+    menuCard('/team/members', 'Members', (data.members || []).length,
+      owners === 1 ? 'One owner.' : `${owners} owners.`),
+    menuCard('/team/escalation', 'Escalation', levels || null,
+      levels
+        ? `${levels === 1 ? 'One level' : `${levels} levels`}${data.escalation.fallback_topic ? ', then a fallback topic.' : '.'}`
+        : 'No ladder — nobody but the first person is woken.'),
+    menuCard('/team/sources', 'Alert sources', keys || null,
+      keys
+        ? (unused ? `${unused} of them never used.` : 'All in use.')
+        : 'No key yet, so nothing can reach this team.'),
+    menuCard('/team/deadman', 'Dead man’s switches', switches || null,
+      switches
+        ? (dead ? `${dead} of them silent.` : 'All quiet, as they should be.')
+        : 'Nothing watched.'),
+  );
+}
+
 // --- schedule --------------------------------------------------------------

 // The rota is one person per UTC day. The on-call page shows it; this is where
 // it is set, which until now was the TUI's job and the TUI cannot do it any
 // more.
-function scheduleCard() {
-  const rows = (data.schedule || []).map((e) =>
-    h('tr', {},
-      h('td', { text: e.date }),
-      h('td', {}, h('strong', { text: e.username })),
-      h('td', {}, isOwner() && h('button', {
-        class: 'btn-sm danger', type: 'button', text: 'Clear',
-        onclick: () => act(() => api.unassignSchedule(teamID, e.id)),
-      })),
-    ));
+//
+// A month of it, as a grid. It used to be thirty rows of "date — username",
+// which is a rota spelled out one day at a time: the question asked of it is
+// "who has which stretch", and thirty names down a column is the one shape
+// that answer cannot be read in. So each day carries a coloured initial
+// instead, the legend says whose, and a shift becomes a run of one colour.
+//
+// The same month laid out the same way as the on-call page's week, because it
+// is the same rota — heading and arrows outside the card, days inside it.

-  return h('div', { class: 'card' },
-    h('h2', { text: 'On-call rota' }),
-    h('p', { class: 'muted small', text: 'One person per UTC day, for the next 30 days.' }),
-    rows.length
-      ? h('table', { class: 'admin-table' }, h('tbody', {}, rows))
-      : h('p', { class: 'muted', text: 'Nobody is scheduled.' }),
-    isOwner() && assignForm(),
-  );
+const monthFmt = new Intl.DateTimeFormat(undefined, { month: 'long', year: 'numeric' });
+const weekdayFmt = new Intl.DateTimeFormat(undefined, { weekday: 'short' });
+const longDayFmt = new Intl.DateTimeFormat(undefined, {
+  weekday: 'long', day: 'numeric', month: 'long',
+});
+
+let monthStart = firstOfMonth(new Date());
+
+function firstOfMonth(d) {
+  return new Date(d.getFullYear(), d.getMonth(), 1);
+}
+
+// The grid runs Monday to Sunday, so it starts before the 1st and ends after
+// the last. Both overhangs are fetched and drawn: a shift that begins on the
+// 30th is a fact about this month even though the days it runs into are not.
+function gridDays() {
+  const start = mondayOf(monthStart);
+  const last = new Date(monthStart.getFullYear(), monthStart.getMonth() + 1, 0);
+  const span = Math.round((last - start) / 86400000) + 1;
+  return { start, count: Math.ceil(span / 7) * 7 };
+}
+
+function shiftMonth(n) {
+  monthStart = new Date(monthStart.getFullYear(), monthStart.getMonth() + n, 1);
+  refresh();
+}
+
+function scheduleCard() {
+  const { start, count } = gridDays();
+  const byDate = new Map((data.schedule || []).map((e) => [e.date, e]));
+  const today = isoDate(new Date());
+  const month = monthStart.getMonth();
+
+  // Whose colours to explain, in the order the month meets them. Only the days
+  // of this month count: a name that appears solely in the overhang belongs to
+  // the month next door and would be explaining a chip nobody asked about.
+  const seen = new Map();
+  const cells = [];
+  for (let i = 0; i < count; i++) {
+    const d = addDays(start, i);
+    const key = isoDate(d);
+    const e = byDate.get(key);
+    const inMonth = d.getMonth() === month;
+    if (inMonth && e && !seen.has(e.user_id)) seen.set(e.user_id, e.username);
+    cells.push(dayCell(d, key, e, inMonth, today));
+  }
+
+  const heads = [];
+  for (let i = 0; i < 7; i++) {
+    // Any Monday will do; this one is a Monday.
+    heads.push(h('span', { class: 'rota-wd', text: weekdayFmt.format(new Date(2024, 0, 1 + i)) }));
+  }
+
+  return [
+    h('div', { class: 'page-head' },
+      h('h2', { text: 'On-call rota' }),
+      h('div', { class: 'week-nav' },
+        h('button', {
+          class: 'btn btn-ghost btn-icon', type: 'button',
+          'aria-label': 'Previous month', onclick: () => shiftMonth(-1),
+        }, icon('chevronLeft')),
+        h('button', {
+          class: 'btn btn-ghost label', type: 'button',
+          title: 'Back to this month',
+          onclick: () => { monthStart = firstOfMonth(new Date()); refresh(); },
+          text: monthFmt.format(monthStart),
+        }),
+        h('button', {
+          class: 'btn btn-ghost btn-icon', type: 'button',
+          'aria-label': 'Next month', onclick: () => shiftMonth(1),
+        }, icon('chevronRight')),
+      ),
+    ),
+    h('div', { class: 'card' },
+      h('div', { class: 'rota-grid' }, heads, cells),
+      h('div', { class: 'rota-foot' }, legend(seen), coverNote(byDate)),
+      // The range form is the way to fill a whole shift at once, but it is not
+      // what the page is for, so it stays folded away under the month it edits.
+      isOwner() && h('details', { class: 'rota-bulk' },
+        h('summary', { text: 'Assign a range of days' }),
+        assignForm()),
+    ),
+  ];
+}
+
+function dayCell(d, key, e, inMonth, today) {
+  const cls = ['rota-day', !inMonth && 'outside', key === today && 'today', key < today && 'past']
+    .filter(Boolean).join(' ');
+  const label = `${key} · ${e ? e.username : 'nobody'}`;
+  const body = [
+    h('span', { class: 'rota-num', text: String(d.getDate()) }),
+    e
+      ? h('span', { class: `rota-chip ${colorClass(e.user_id)}`, text: initial(e.username) })
+      : h('span', { class: 'rota-chip none' }),
+  ];
+  // A member sees the same grid without the affordance, the way every other
+  // control on this page is hidden rather than shown and refused.
+  return isOwner()
+    ? h('button', {
+      class: cls, type: 'button', title: label, 'aria-label': label,
+      onclick: () => daySheet(key, e),
+    }, body)
+    : h('div', { class: cls, title: label }, body);
+}
+
+// A colour per person, taken from their place in the member list so that it
+// holds still as you page between months. Somebody who holds days but has
+// since left the team is not in that list and falls back to their id.
+function colorClass(userID) {
+  const i = (data.members || []).findIndex((m) => m.user_id === userID);
+  return `rc${((i < 0 ? userID : i) % 6) + 1}`;
+}
+
+function legend(seen) {
+  if (!seen.size) return null;
+  return h('div', { class: 'rota-legend' },
+    [...seen].map(([id, name]) => h('span', { class: 'rota-key' },
+      h('span', { class: `rota-chip ${colorClass(id)}`, text: initial(name) }),
+      h('span', { text: name }),
+      id === myID() && h('span', { class: 'you', text: 'you' }),
+    )));
+}
+
+// The gap count, which is the one thing the grid states only by omission. Days
+// already past are not counted: an empty Tuesday last week is history, not a
+// hole somebody still has to fill.
+function coverNote(byDate) {
+  const today = isoDate(new Date());
+  const last = new Date(monthStart.getFullYear(), monthStart.getMonth() + 1, 0).getDate();
+  let gaps = 0;
+  for (let day = 1; day <= last; day++) {
+    const key = isoDate(new Date(monthStart.getFullYear(), monthStart.getMonth(), day));
+    if (key >= today && !byDate.has(key)) gaps++;
+  }
+  if (gaps === 0) return h('p', { class: 'rota-note', text: 'Every day left this month has somebody on call.' });
+  return h('p', { class: 'rota-note' },
+    h('strong', { text: gaps === 1 ? '1 day' : `${gaps} days` }),
+    ' left this month with nobody on call.');
+}
+
+// One day, in the sheet: who has it, who should, and the way to empty it. This
+// is where the per-row Clear button went — the grid has no room for thirty of
+// them, and the day you want to change is the one you just tapped.
+function daySheet(date, entry) {
+  const who = memberSelect(entry ? entry.user_id : undefined);
+  openSheet(() => [
+    h('h2', { class: 'sheet-title', text: longDayFmt.format(parseISO(date)) }),
+    h('p', { class: 'sheet-text', text: entry ? `${entry.username} is on call.` : 'Nobody is on call.' }),
+    h('label', { class: 'sheet-pick' }, 'On call ', who),
+    h('div', { class: 'sheet-actions' },
+      entry && h('button', {
+        class: 'btn btn-danger', type: 'button', text: 'Clear',
+        onclick: () => { closeSheet(); act(() => api.unassignSchedule(teamID, entry.id)); },
+      }),
+      h('button', {
+        class: 'btn btn-primary', type: 'button', autofocus: true, text: 'Assign',
+        // replace, where the range form asks first: the sheet has just named
+        // whoever holds the day, so taking it from them is the thing that was
+        // asked for rather than something to be warned about.
+        onclick: () => {
+          closeSheet();
+          act(() => api.assignSchedule(teamID, Number(who.value), [date], true));
+        },
+      }),
+    ),
+  ]);
+}
+
+function parseISO(s) {
+  const [y, m, d] = s.split('-').map(Number);
+  return new Date(y, m - 1, d);
 }

 function assignForm() {
  const who = memberSelect();
-  const from = h('input', { type: 'date', required: true, value: isoDate(new Date()) });
+  // The form opens on the month above it rather than on today: it is folded
+  // into that month's card, and paging to March to fill March and being handed
+  // today's date would be the card and the form disagreeing about the subject.
+  const now = new Date();
+  const sameMonth = monthStart.getFullYear() === now.getFullYear()
+    && monthStart.getMonth() === now.getMonth();
+  const from = h('input', {
+    type: 'date', required: true, value: isoDate(sameMonth ? now : monthStart),
+  });
  const days = h('input', { type: 'number', min: '1', max: '31', value: '1', class: 'setting-value' });
  const replace = h('input', { type: 'checkbox' });

@@ -355,47 +652,146 @@ function newIntegrationForm() {

 // --- dead man's switches ---------------------------------------------------

+const SWITCH_STATUS = {
+  healthy: { label: 'Healthy', hint: 'Heard from within its timeout.' },
+  dead: { label: 'Dead', hint: 'Silent for longer than its timeout.' },
+  dormant: { label: 'Dormant', hint: 'Nothing has matched yet, so there is nothing to lose.' },
+};
+
+function switchBadge(status) {
+  const s = SWITCH_STATUS[status] || SWITCH_STATUS.dormant;
+  const el = badge(s.label, `st-${status}`);
+  el.title = s.hint;
+  return el;
+}
+
+const timeCell = (iso) => iso
+  ? h('span', { title: when(iso), text: ago(iso) })
+  : h('span', { class: 'muted', text: 'never' });
+
+// When it last opened an incident. An incident that is still open is a link,
+// because that is the thing somebody looking at a red row wants next.
+const triggeredCell = (iso, incidentID) => {
+  if (!iso) return h('span', { class: 'muted', text: 'never' });
+  return incidentID
+    ? h('a', { href: `/incidents/${incidentID}`, title: when(iso) }, `#${incidentID} · ${ago(iso)}`)
+    : h('span', { title: when(iso), text: ago(iso) });
+};
+
+function switchRows(sw) {
+  const main = h('tr', {},
+    h('td', {}, switchBadge(sw.status)),
+    h('td', {},
+      h('strong', { text: sw.name }),
+      sw.name !== sw.matcher && h('div', { class: 'muted small' }, h('code', { text: sw.matcher }))),
+    h('td', { class: 'muted small' }, timeCell(sw.last_heartbeat_at)),
+    h('td', { class: 'muted small' }, triggeredCell(sw.last_triggered_at, sw.open_incident_id)),
+    h('td', { class: 'muted small', text: duration(sw.timeout_seconds * 1000) }),
+    h('td', {}, isOwner() && h('button', {
+      class: 'btn-sm danger', type: 'button', text: 'Remove',
+      onclick: async () => {
+        if (!(await confirm({
+          title: `Remove ${sw.name}?`,
+          text: 'It stops being watched. An incident it already opened stays open until it is resolved.',
+          confirmLabel: 'Remove',
+          danger: true,
+        }))) return;
+        act(() => api.deleteDeadmanSwitch(teamID, sw.id));
+      },
+    })),
+  );
+
+  // One heartbeat is the switch's own times; several are worth telling apart,
+  // since a live cluster must not hide a dead one.
+  const sources = sw.sources.length > 1
+    ? sw.sources.map((src) => h('tr', { class: 'source-row' },
+      h('td', {}, switchBadge(src.status)),
+      h('td', { class: 'source-labels' },
+        ...Object.entries(src.labels || {})
+          .filter(([k]) => k !== 'alertname')
+          .map(([k, v]) => labelChip(k, v)),
+        !Object.keys(src.labels || {}).some((k) => k !== 'alertname')
+          && h('code', { class: 'small', text: src.fingerprint })),
+      h('td', { class: 'muted small' }, timeCell(src.last_heartbeat_at)),
+      h('td', { class: 'muted small' }, triggeredCell(src.last_triggered_at, src.incident_id)),
+      h('td'), h('td')))
+    : [];
+  return [main, ...sources];
+}
+
 function deadmanCard() {
-  const d = data.deadman || {};
-  const matchers = h('input', {
-    type: 'text', value: d.matchers || '', placeholder: 'alertname=Watchdog',
-    class: 'wide',
-  });
-  const timeout = h('input', {
-    type: 'number', min: '0', class: 'setting-value',
-    value: String(Math.round((d.timeout_seconds || 0) / 60)),
-  });
-  const severity = h('select', {},
-    ...['critical', 'error', 'warning', 'info'].map((s) =>
-      h('option', { value: s, text: s, selected: (d.severity || 'critical') === s })));
-
-  const form = h('form', { class: 'stacked-form' },
-    h('label', {}, 'Heartbeat alerts ', matchers),
-    h('label', {}, 'Declare dead after ', timeout, ' minutes of silence'),
-    h('label', {}, 'Open the incident at severity ', severity),
-    h('button', { class: 'btn', type: 'submit', text: 'Save switches' }));
-
-  form.addEventListener('submit', (e) => {
-    e.preventDefault();
-    act(() => api.setDeadman(teamID, {
-      matchers: matchers.value.trim(),
-      timeout_seconds: Number(timeout.value) * 60,
-      severity: severity.value,
-    }));
-  });
+  const switches = data.deadman || [];

  return h('div', { class: 'card' },
-    h('h2', { text: 'Dead man’s switches' }),
+    h('div', { class: 'card-head' },
+      h('h2', { text: 'Dead man’s switches' }),
+      isOwner() && h('button', {
+        class: 'btn', type: 'button', text: 'New switch', onclick: openNewSwitch,
+      })),
    h('p', { class: 'muted small' },
      'Alerts whose ABSENCE is the signal. Receiving one opens nothing; going ',
-      'quiet for longer than the timeout opens an incident. ',
-      h('code', { text: 'alertname=Watchdog,cluster=prod; alertname=EdgeHeartbeat' }),
-      ' — semicolons separate switches, commas separate conditions, and every ',
-      'switch must name an alertname. Leave empty to watch nothing.'),
-    isOwner() ? form : h('p', { class: 'muted', text: d.matchers || 'Nothing watched.' }),
+      'quiet for longer than the switch’s timeout opens an incident.'),
+    switches.length
+      ? h('div', { class: 'table-scroll' },
+        h('table', { class: 'admin-table switch-table' },
+          h('thead', {}, h('tr', {},
+            h('th', { text: 'Status' }), h('th', { text: 'Switch' }),
+            h('th', { text: 'Last heartbeat' }), h('th', { text: 'Last triggered' }),
+            h('th', { text: 'Silent after' }), h('th'))),
+          h('tbody', {}, switches.flatMap(switchRows))))
+      : h('p', { class: 'muted', text: 'Nothing watched.' }),
  );
 }

+// The form lives in the sheet, not on the page: most visits are to look at the
+// list, and a form that is always open is the page this replaced.
+function openNewSwitch() {
+  const name = h('input', { type: 'text', placeholder: 'Prod Watchdog', autofocus: true });
+  const matcher = h('input', {
+    type: 'text', placeholder: 'alertname=Watchdog,cluster=prod', class: 'wide', required: true,
+  });
+  const timeout = h('input', {
+    type: 'number', min: '1', value: '15', class: 'setting-value', required: true,
+  });
+  const severity = h('select', {},
+    ...['critical', 'error', 'warning', 'info'].map((s) => h('option', { value: s, text: s })));
+  const problem = h('p', { class: 'load-error', hidden: true });
+
+  const form = h('form', { class: 'stacked-form' },
+    h('label', {}, 'Name (optional) ', name),
+    h('label', {}, 'Heartbeat alert ', matcher),
+    h('p', { class: 'muted small' },
+      'Conditions are ', h('code', { text: 'label=value' }), ' separated by commas, and one ',
+      'must be ', h('code', { text: 'alertname' }), '. Every distinct label set that ',
+      'matches is watched on its own.'),
+    h('label', {}, 'Declare dead after ', timeout, ' minutes of silence'),
+    h('label', {}, 'Open the incident at severity ', severity),
+    problem,
+    h('div', { class: 'sheet-actions' },
+      h('button', { class: 'btn', type: 'button', text: 'Cancel', onclick: () => closeSheet(false) }),
+      h('button', { class: 'btn btn-primary', type: 'submit', text: 'Add switch' })));
+
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    try {
+      await api.createDeadmanSwitch(teamID, {
+        name: name.value.trim(),
+        matcher: matcher.value.trim(),
+        timeout_seconds: Math.round(Number(timeout.value) * 60),
+        severity: severity.value,
+      });
+    } catch (err) {
+      problem.textContent = err.message;
+      problem.hidden = false;
+      return;
+    }
+    closeSheet(true);
+    refresh();
+  });
+
+  openSheet(() => [h('h2', { class: 'sheet-title', text: 'New switch' }), form]);
+}
+
 // --- members ---------------------------------------------------------------

 function membersCard() {
@@ -34,15 +34,21 @@ export function clear(el, ...children) {
 const ICONS = {
  back: ['M15 18l-6-6 6-6'],
  more: ['M5 12h.01M12 12h.01M19 12h.01'],
+  queueList: ['M4 6h16M4 12h16M4 18h10'],
+  calendar: ['rect:3.5,5,17,15,2', 'M3.5 10h17M8 3v4M16 3v4'],
+  team: ['circle:9,8,3', 'circle:17,9,2.5', 'M3 19a6 6 0 0 1 12 0M15 19a5 5 0 0 1 6-4'],
+  shield: ['M12 3l7 3v6c0 4-3 7-7 9-4-2-7-5-7-9V6z'],
  check: ['M5 12.5l4.5 4.5L19 7'],
  checkCircle: ['M8 12.5l3 3 5-6', 'circle:12,12,9'],
  undo: ['M9 14L4 9l5-5', 'M4 9h10a6 6 0 0 1 0 12h-3'],
  user: ['circle:12,8,3.5', 'M5 20a7 7 0 0 1 14 0'],
  clock: ['circle:12,12,9', 'M12 7v5l3 2'],
+  chart: ['M4 20h16M7 20v-7M12 20V6M17 20v-10'],
  bell: ['M6 16V11a6 6 0 0 1 12 0v5l1.5 2h-15z', 'M10 20.5a2 2 0 0 0 4 0'],
  note: ['M5 4h14v12l-4 4H5z', 'M15 20v-4h4', 'M9 9h6M9 13h4'],
  archive: ['M3.5 5h17v4h-17z', 'M5 9v10h14V9', 'M10 13h4'],
  flag: ['M5 21V4', 'M5 4h11l-2 4 2 4H5'],
+  copy: ['rect:9,9,11,11,2', 'M5 15V6a2 2 0 0 1 2-2h9'],
  trash: ['M4 7h16', 'M9 7V4h6v3', 'M6 7l1 13h10l1-13'],
  chevronLeft: ['M15 18l-6-6 6-6'],
  chevronRight: ['M9 6l6 6-6 6'],
@@ -64,6 +70,14 @@ export function icon(name, cls = 'icon') {
      node.setAttribute('cx', cx);
      node.setAttribute('cy', cy);
      node.setAttribute('r', r);
+    } else if (d.startsWith('rect:')) {
+      const [x, y, w, hgt, rx] = d.slice(5).split(',');
+      node = document.createElementNS(SVG, 'rect');
+      node.setAttribute('x', x);
+      node.setAttribute('y', y);
+      node.setAttribute('width', w);
+      node.setAttribute('height', hgt);
+      if (rx) node.setAttribute('rx', rx);
    } else {
      node = document.createElementNS(SVG, 'path');
      node.setAttribute('d', d);
@@ -160,6 +174,18 @@ export function labelChip(k, v) {
  return h('span', { class: 'label', title: `${k}=${v}` }, h('span', { text: k }), h('span', { text: v }));
 }

+// One entry in a section's overview: a card that is a link, carrying the count
+// only that section can state. Both the Admin tab and the Team tab open on one
+// of these menus, and a menu item is a shape rather than a page's own idea.
+export function menuCard(href, label, count, note) {
+  return h('a', { class: 'card overview-item', href },
+    h('div', { class: 'overview-head' },
+      h('strong', { text: label }),
+      count != null && h('span', { class: 'overview-count', text: String(count) })),
+    h('p', { class: 'muted small', text: note }),
+  );
+}
+
 export function emptyState(title, text, iconName) {
  return h('div', { class: 'empty' },
    iconName && icon(iconName),
@@ -0,0 +1,26 @@
+package web
+
+import (
+	"io/fs"
+	"strings"
+	"testing"
+)
+
+func TestStatsPageIsEmbedded(t *testing.T) {
+	sub, err := fs.Sub(files, "static")
+	if err != nil {
+		t.Fatal(err)
+	}
+	index, err := fs.ReadFile(sub, "index.html")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{`id="view-stats"`, `data-section="stats"`} {
+		if !strings.Contains(string(index), want) {
+			t.Errorf("index.html lacks %s", want)
+		}
+	}
+	if _, err := fs.Stat(sub, "js/stats.js"); err != nil {
+		t.Errorf("js/stats.js not embedded: %v", err)
+	}
+}