Say plainly that stats cover all teams

The README said stats were "not team-scoped by the server", which reads
as though they were unscoped. They are scoped, to all of the caller's
teams (TestTeams_AlertsAndStatsAreScoped in terdut-server); what they
cannot do is narrow to one. Docs only, no code change.

.gitea/workflows/ci.yaml

@@ -56,34 +56,8 @@ jobs:
             git clone --depth=1 --branch "$REF_NAME" "$REPO_URL" .
           fi
 
-      # This exists because `go vet` does not look at import order: the move to
-      # git.ryuvia.com rewrote every import path without re-sorting, the new path sorts
-      # before github.com/..., and both repos sat unformatted through a green CI run and
-      # a release before anyone noticed.
-      #
-      # Both of gofmt's failure modes need handling, and they are not alike. A file that
-      # is merely misformatted is listed on stdout with exit 0 -- so the failure has to
-      # be raised by hand. A file that does not parse is the opposite: nothing on stdout
-      # and exit 2, which a naive `[ -n "$unformatted" ]` reads as success. The first
-      # draft of this step had exactly that hole.
-      - name: Format
-        run: |
-          if ! unformatted=$(gofmt -l .); then
-            echo "::error::gofmt could not parse the tree"
-            gofmt -l .    # re-run unredirected so the parse errors reach the log
-            exit 1
-          fi
-          if [ -n "$unformatted" ]; then
-            echo "::error::not gofmt'd:"
-            echo "$unformatted"
-            gofmt -d .
-            exit 1
-          fi
-
-      - name: Vet
-        run: go vet ./...
-
-      # Covers the API client against a stub server, the Update state machine, and View
-      # rendering -- all three are pure enough to test without a terminal.
-      - name: Test
-        run: go test ./...
+      # The Makefile is the single definition of the gate -- gofmt with both of its failure
+      # modes handled, go vet, and the tests -- so this is exactly what a developer and the
+      # release skill run. See the comments on the targets for why each is shaped as it is.
+      - name: Format, vet and test
+        run: make fmt lint test

.gitea/workflows/release.yaml

@@ -8,9 +8,9 @@ name: Release
 # the job that publishes them. Nothing is handed between jobs.
 #
 # The asset names matter beyond being tidy: internal/updater looks for exactly
-# terdut-tui-<tag>-<goos>-<goarch> in the latest release and reports every available name
-# when it cannot find one. Renaming the pattern here breaks self-update for every
-# installed binary.
+# terdut-tui-<tag>-<goos>-<goarch> in the latest release. The pattern is defined once, by
+# `make dist` (and `make dist-assets`, which the release skill checks the published release
+# against) -- see DIST_TARGETS in the Makefile before touching it.
 on:
   push:
     tags:
@@ -41,35 +41,9 @@ jobs:
           REF_NAME: ${{ github.ref_name }}
         run: git clone --depth=1 --branch "$REF_NAME" "$REPO_URL" .
 
-      # This exists because `go vet` does not look at import order: the move to
-      # git.ryuvia.com rewrote every import path without re-sorting, the new path sorts
-      # before github.com/..., and both repos sat unformatted through a green CI run and
-      # a release before anyone noticed.
-      #
-      # Both of gofmt's failure modes need handling, and they are not alike. A file that
-      # is merely misformatted is listed on stdout with exit 0 -- so the failure has to
-      # be raised by hand. A file that does not parse is the opposite: nothing on stdout
-      # and exit 2, which a naive `[ -n "$unformatted" ]` reads as success. The first
-      # draft of this step had exactly that hole.
-      - name: Format
-        run: |
-          if ! unformatted=$(gofmt -l .); then
-            echo "::error::gofmt could not parse the tree"
-            gofmt -l .    # re-run unredirected so the parse errors reach the log
-            exit 1
-          fi
-          if [ -n "$unformatted" ]; then
-            echo "::error::not gofmt'd:"
-            echo "$unformatted"
-            gofmt -d .
-            exit 1
-          fi
-
-      - name: Vet
-        run: go vet ./...
-
-      - name: Test
-        run: go test ./...
+      # Same target CI and the release skill run; a tag that fails it publishes nothing.
+      - name: Format, vet and test
+        run: make fmt lint test
 
   binaries:
     needs: test
@@ -86,21 +60,12 @@ jobs:
           REF_NAME: ${{ github.ref_name }}
         run: git clone --depth=1 --branch "$REF_NAME" "$REPO_URL" .
 
+      # The Makefile owns the target list and the asset names -- see DIST_TARGETS there for
+      # why the naming pattern cannot change.
       - name: Build every target
         env:
           REF_NAME: ${{ github.ref_name }}
-        run: |
-          set -eu
-          mkdir -p dist
-          for target in linux/amd64 linux/arm64 darwin/amd64 darwin/arm64; do
-            GOOS="${target%/*}"
-            GOARCH="${target#*/}"
-            out="dist/terdut-tui-${REF_NAME}-${GOOS}-${GOARCH}"
-            echo "building $out"
-            GOOS="$GOOS" GOARCH="$GOARCH" go build \
-              -ldflags "-X main.version=${REF_NAME}" \
-              -o "$out" .
-          done
+        run: make dist VERSION="$REF_NAME"
 
       # Creating the release is made idempotent rather than assumed-new: a re-run of a
       # failed release must not die on the release that already exists. Assets are
@@ -126,6 +91,28 @@ jobs:
           [ -n "$release_id" ] || { echo "::error::could not determine release id"; exit 1; }
           echo "release id $release_id"
 
+          # The release notes are the tag's own message, minus its subject line: the
+          # tag body is the changelog for this project, and without this the release
+          # page stays empty. Only an annotated tag has one, and only a release with
+          # no notes is filled, so a re-run repairs a release created empty without
+          # overwriting notes somebody has since edited by hand.
+          #
+          # There is no jq in this image, so the JSON string is escaped by hand:
+          # backslashes first (or the ones added next would double), then quotes and
+          # tabs, then each line end becomes a literal \n.
+          if [ "$(git cat-file -t "$REF_NAME")" = tag ] \
+             && printf '%s' "$body" | grep -q '"body":""'; then
+            notes=$(git tag -l --format='%(contents)' "$REF_NAME" | sed '1,2d')
+            if [ -n "$notes" ]; then
+              notes_json=$(printf '%s\n' "$notes" \
+                | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/\t/\\t/g' -e 's/\r$//' \
+                | awk 'BEGIN { ORS = "\\n" } { print }')
+              echo "setting release notes from the tag message"
+              curl -sf -X PATCH -H "$auth" -H 'Content-Type: application/json' \
+                -d "{\"body\":\"$notes_json\"}" "$API/releases/$release_id" > /dev/null
+            fi
+          fi
+
           for f in dist/*; do
             name=$(basename "$f")
             # Drop an existing asset of the same name first: Gitea happily stores two

.gitignore

@@ -1,2 +1,3 @@
 terdut-tui
 .graymatter/
+dist/

.release.conf

@@ -0,0 +1,9 @@
+# Read by the `release` skill (~/.claude/skills/release).
+#
+# terdut-tui publishes binaries to a Gitea release and nothing else: no image, no Helm
+# chart, no wrapper in Ryuvia/charts. KIND=binary tells the skill to gate, tag, wait for
+# release.yaml and verify the published assets, and to skip the chart steps.
+KIND=binary
+
+# English, like the rest of the terdut projects.
+PROSE_LANG=en

CLAUDE.md

@@ -1,6 +1,6 @@
 # terdut-tui
 
-TUI client for [terdut-server](https://git.ryuvia.com/niklas/terdut-server), a Prometheus Alertmanager receiver and incident manager. Requires server **v0.4.0+**.
+TUI client for [terdut-server](https://git.ryuvia.com/niklas/terdut-server), a Prometheus Alertmanager receiver and incident manager. Requires server **v0.20.0+** (team-scoped API).
 
 ## Domain model
 
@@ -11,10 +11,37 @@ The server splits alerts from incidents, and this client mirrors it:
   assignee, snooze, notes and an append-only timeline. Many alerts to one incident,
   correlated by Alertmanager's `groupKey`.
 
+The server is multi-team: incidents, alerts and the schedule belong to a team, and
+the caller only sees their own teams. `Model.activeTeamID` (0 = all) narrows the
+incident and alert lists via `team_id`; the schedule is per team and uses
+`Model.scheduleTeam()`. Users have `is_admin`, and the TUI mirrors the server's
+permission rules up front (`canEditSchedule`, `canManageUser`, `isAdmin`) so a 403 is
+explained before the round trip, not after. The server has no version endpoint;
+an old one is recognised by `GET /api/teams` answering 404 (`errServerTooOld`).
+
 All user actions target incidents. Two server behaviours the UI has to respect:
 manual resolve is **terminal** (hence the confirmation prompt), and snooze is the
 non-destructive "not now" alternative.
 
+## Release
+
+Say **"Release"** (or "Release X.Y.Z") and the `release` skill runs it. This repo is
+`KIND=binary` in `.release.conf`: it publishes binaries to a Gitea release and has no image,
+chart or wrapper-chart PR. The run is gate, commit, push, tag, wait for `release.yaml`, then
+`verify-release`. Preconditions and the plan, without side effects:
+
+```sh
+~/.claude/skills/release/scripts/release-preflight          # state + suggested version
+~/.claude/skills/release/scripts/release-preflight vX.Y.Z   # validate that release
+```
+
+- `make fmt lint test` is the gate, and it **is** what `ci.yaml` and `release.yaml` run.
+- `make dist VERSION=vX.Y.Z` builds the four binaries; `make dist-assets` lists their names.
+  The pattern `terdut-tui-<tag>-<goos>-<goarch>` is the self-updater's contract with every
+  installed binary, so changing it breaks self-update.
+- **The annotated tag's message becomes the release notes** (`release.yaml` copies it, minus
+  its subject line). Write it for a reader of the release page. Never move a published tag.
+
 ## Tech stack
 
 - Go 1.25+
@@ -25,7 +52,7 @@ non-destructive "not now" alternative.
 ## Project layout
 
 ```
-main.go                      CLI entry point: flags, config load, health check, start TUI
+main.go                      CLI entry point: flags, config load, start TUI
 internal/api/client.go       REST API client — one method per endpoint
 internal/config/config.go    Config loader (~/.config/terdut-tui/config.yaml)
 internal/theme/              Colour themes: semantic tokens, built-ins, user file loader
@@ -35,7 +62,7 @@ internal/tui/                Bubbletea UI
   view.go                    View() — pure rendering
   keys.go                    keyMap (bubbles/key pattern)
   styles.go                  Styles struct — every lipgloss style, built from a theme
-internal/updater/updater.go  Self-update via GitHub Releases
+internal/updater/updater.go  Self-update via Gitea releases
 ```
 
 ## Architecture rules
@@ -54,16 +81,24 @@ Location: `~/.config/terdut-tui/config.yaml`
 
 ```yaml
 server_url: https://terdut.example.com
-api_key: <64-char hex key>
+username: niklas      # optional, prefills the sign-in form
 refresh_interval: 30  # seconds, optional, default 30
 theme: gruvbox-dark   # optional, default gruvbox-dark
+team: Ops             # optional, team name or id to start on, default all
 ```
 
 Built-in themes are `gruvbox-dark` and `gruvbox-light`; user themes are YAML
 files in `~/.config/terdut-tui/themes/`, optionally `extends:`-ing a built-in.
 See the README for the token list.
 
-The API key is a one-time secret generated by terdut-server (`POST /api/users/{id}/api-keys`).
+There is no API key in the config. The TUI signs in as a user (`POST /api/login`, the
+same session cookie as the web UI) and `internal/session` keeps the token in
+`~/.config/terdut-tui/session.json`, mode 0600, keyed by server URL. The client
+attaches `terdut_session` itself rather than using a cookie jar, because a jar drops the
+server's Secure cookie over plain http. It must never send `Authorization` as well: the
+server judges a request with that header on it alone. A 401 from anything (`msgError`
+in `update.go`) returns to the sign-in form and clears `Model`. A user with no password
+cannot sign in, and the server answers it like a wrong one, so the form says so.
 
 ## Running
 
@@ -95,6 +130,8 @@ go build -ldflags="-X main.version=v0.1.0" -o terdut-tui .
 | 4 | On-call schedule calendar view |
 | 5 | User management and API key lifecycle |
 | 6 | Incidents: queue, timeline, ack/assign/snooze/resolve, MTTA/MTTR |
+| 7 | Teams: `T` switcher, per-team schedule, admin/disabled markers (server v0.20) |
+| 8 | Sign in as a user instead of an API key (server v0.10+ session cookie) |
 
 <!-- graymatter:instructions:begin — managed by `graymatter init`; edits inside this block are overwritten -->
 ## Memory (GrayMatter)

Makefile

@@ -1,6 +1,6 @@
 VERSION := $(shell git describe --tags --always --dirty)
 
-.PHONY: build install test
+.PHONY: build install test lint fmt dist dist-assets release-vars
 
 build:
 	go build -ldflags "-X main.version=$(VERSION)" -o terdut-tui .
@@ -8,5 +8,59 @@ build:
 install:
 	go install -ldflags "-X main.version=$(VERSION)" .
 
-test:
+# ci.yaml and release.yaml run `make fmt lint test`, so a green gate here and a green
+# pipeline are the same code rather than two descriptions of it. It is also what the
+# release skill runs before tagging.
+
+# Covers the API client against a stub server, the sign-in flow, the Update state
+# machine, and View rendering -- all pure enough to test without a terminal.
+test: ## Run the test suite
 	go test ./...
+
+lint: ## go vet
+	go vet ./...
+
+# This exists because `go vet` does not look at import order: the move to
+# git.ryuvia.com rewrote every import path without re-sorting, the new path sorts
+# before github.com/..., and both repos sat unformatted through a green CI run and
+# a release before anyone noticed.
+#
+# Both of gofmt's failure modes need handling, and they are not alike. A file that
+# is merely misformatted is listed on stdout with exit 0 -- so the failure has to
+# be raised by hand. A file that does not parse is the opposite: nothing on stdout
+# and exit 2, which a naive `[ -n "$$unformatted" ]` reads as success. The first
+# draft of this target had exactly that hole.
+fmt: ## Fail on files that are not gofmt'd
+	@if ! unformatted=$$(gofmt -l .); then \
+		echo "gofmt could not parse the tree:"; gofmt -l .; exit 1; \
+	fi; \
+	if [ -n "$$unformatted" ]; then \
+		echo "not gofmt'd:"; echo "$$unformatted"; gofmt -d .; exit 1; \
+	fi
+
+# What a release publishes. The asset names matter beyond being tidy: internal/updater
+# looks for exactly terdut-tui-<tag>-<goos>-<goarch> in the latest release and reports
+# every available name when it cannot find one. Renaming the pattern here breaks
+# self-update for every installed binary.
+DIST_TARGETS := linux/amd64 linux/arm64 darwin/amd64 darwin/arm64
+
+dist: ## Build every release binary into dist/ (VERSION=vX.Y.Z to name them)
+	@set -eu; mkdir -p dist; \
+	for target in $(DIST_TARGETS); do \
+		goos="$${target%/*}"; goarch="$${target#*/}"; \
+		out="dist/terdut-tui-$(VERSION)-$$goos-$$goarch"; \
+		echo "building $$out"; \
+		GOOS="$$goos" GOARCH="$$goarch" go build -ldflags "-X main.version=$(VERSION)" -o "$$out" .; \
+	done
+
+# The names dist produces, one per line, so the release skill can check the published
+# release has every one of them rather than a count.
+dist-assets: ## Print the asset names a release of VERSION carries
+	@for target in $(DIST_TARGETS); do \
+		echo "terdut-tui-$(VERSION)-$${target%/*}-$${target#*/}"; \
+	done
+
+# Read by the release skill for a repo that publishes binaries and no image or chart
+# (KIND=binary in .release.conf). There is nothing to say about images or charts.
+release-vars: ## Print the variables the release process reads
+	@printf 'APP=terdut-tui\n'

README.md

@@ -10,12 +10,33 @@ Written in Go using [Bubbletea](https://github.com/charmbracelet/bubbletea).
 - **Incident actions** — acknowledge, assign, snooze, note, resolve and archive
 - **Timeline** — the full history of an incident, system events, pages and notes together
 - **Alert feed** — the raw read-only alerts underneath, each linked to its incident
-- **On-call schedule** — visual calendar of who is on duty, assign and remove entries
+- **Teams** — switch between your teams, or see all of them at once
+- **On-call schedule** — visual calendar of who is on duty in a team, assign and remove entries
 - **Statistics** — MTTA and MTTR, plus alert frequency by name, hour and day
 - **User management** — add and remove users, manage API keys, set each user's ntfy topic
 
-> Requires terdut-server **v0.4.0 or later**. Earlier servers have no incidents API;
-> use terdut-tui v0.3.x with those.
+> Requires terdut-server **v0.20.0 or later**. The server became team-scoped in
+> v0.12 and this client follows it; earlier servers answer 404 for `/api/teams`
+> and the TUI says so on start. Use terdut-tui v0.9.x with servers before v0.12.
+> Escalation ladders, invites, integrations and the admin settings stay in the
+> server's web UI.
+
+## Teams
+
+Everything the server returns is scoped to the teams your key's user belongs
+to. The header shows which are on screen, and `T` steps through *all* → each of
+your teams in turn. With several teams showing, incident and alert rows carry a
+Team column.
+
+The schedule is one team's rota, so the Schedule section shows the active team,
+or with *all* showing the first team you own. Only a team's owners, and
+administrators, can change its rota; anyone else gets the reason in the status
+bar instead of a picker. The picker offers only that team's members, because the
+server refuses anybody else. Stats always cover all your teams; the server
+cannot narrow them to one.
+
+Administrators are the only users who can create or delete users, or act on
+someone else's password, topic or API keys. Everyone can manage their own.
 
 ## Alerts and incidents
 
@@ -49,9 +70,6 @@ Every delivery lands on the incident's timeline: `Notified <user> (triggered)`
 when ntfy accepted the page, and `Notification to <user> failed` when it ran out
 of retries. That second one is the one to look for when nobody's phone rang.
 
-Editing topics needs terdut-server **v0.6.0 or later**; the timeline entries need
-**v0.7.0 or later**. Against an older server the topic column stays empty and
-editing one reports the server's 404.
 
 ## Installation
 
@@ -67,12 +85,31 @@ Create `~/.config/terdut-tui/config.yaml`:
 
 ```yaml
 server_url: https://terdut.example.com
-api_key: <your-api-key>
+username: niklas      # optional, prefills the sign-in form
 refresh_interval: 30  # seconds, optional
 theme: gruvbox-dark   # optional, this is the default
+team: Ops             # optional, a team name or id to start on; default is all
 ```
 
-The API key is generated in terdut-server. See the server documentation for how to bootstrap a user and issue an API key.
+## Signing in
+
+The TUI signs in the way the web UI does: with a user account's username and
+password, on a form shown at start. It keeps the server's session, not the
+password, in `~/.config/terdut-tui/session.json` (readable by you only), so the
+next start resumes it. The server's sessions last 30 days and slide with use.
+When it has ended, or the account is disabled or the session is ended from the web
+UI, the TUI returns to the form and says so. `L` signs out, which also ends the
+session on the server and deletes the saved one.
+
+The account needs a password, since that is what signing in uses. A user
+created only for API access has none and cannot sign in: the server answers it
+exactly like a wrong password. Set one in the web UI, or have an administrator
+press `p` on that user in Users. Too many failed attempts are rate limited by
+the server for a few minutes.
+
+> **Upgrading from v0.10.0 and earlier:** `api_key` in `config.yaml` is no longer
+> used. Remove it and sign in. API keys still exist on the server, and `k` in
+> Users still manages them, for whatever else uses them.
 
 ## Themes
 
@@ -133,6 +170,8 @@ Global:
 | `esc` | Go back |
 | `r` | Refresh |
 | `f` | Cycle filter |
+| `L` | Sign out |
+| `T` | Switch team: all → each of your teams (when you have more than one) |
 | `q` | Quit |
 
 The sections, in `tab` order: Incidents · Alerts · Stats · Archived · Schedule · Users.
@@ -181,9 +220,8 @@ Schedule section:
 One person holds a given day. Assigning over days somebody else already has
 asks first — naming them and how many days are being taken — and moves the whole
 selection at once when you accept, so reassigning a week is one confirmation
-rather than seven deletions. Taking somebody's shift needs terdut-server
-**v0.8.0 or later**; against an older server the assignment is refused with
-`date already assigned`.
+rather than seven deletions. The header line names the team whose rota this is,
+and "On-call today" lists everyone on call across your teams.
 
 Users section:
 
@@ -196,5 +234,6 @@ Users section:
 | `p` | Set the selected user's web UI password — asks for the current one when it is your own |
 
 In Users, `k` and `d` act on the selected row, so move with `↑`/`↓` there rather
-than `k`. Setting passwords needs terdut-server **v0.10.2 or later**, the first
-with a web UI.
+than `k`. The Flags column marks administrators and disabled accounts. `n` and `d`
+are for administrators; `t`, `k` and `p` work on your own row, or on anyone's if you
+are one.

internal/api/client.go

@@ -3,6 +3,7 @@ package api
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -11,29 +12,98 @@ import (
 	"time"
 )
 
+// SessionCookie is the cookie terdut-server's web UI signs in with.
+const SessionCookie = "terdut_session"
+
+// Client talks to terdut-server as the user who signed in. Login trades a
+// username and password for a session, the same one the web UI holds, and every
+// request after it carries that session's cookie.
+//
+// The cookie is attached by hand rather than through a cookie jar: the server
+// marks it Secure behind https, and a jar drops a Secure cookie it is handed
+// over plain http, which would make a local server unusable for no reason. There
+// is nothing else a jar would do here — the token is opaque and does not change
+// while the session lives.
 type Client struct {
 	baseURL    string
 	httpClient *http.Client
-	apiKey     string
+	session    string
 }
 
-func NewClient(baseURL, apiKey string) *Client {
+func NewClient(baseURL string) *Client {
 	return &Client{
 		baseURL: strings.TrimRight(baseURL, "/"),
-		apiKey:  apiKey,
 		httpClient: &http.Client{
 			Timeout: 10 * time.Second,
 		},
 	}
 }
 
+// SetSession resumes a session from a token saved earlier.
+func (c *Client) SetSession(token string) { c.session = token }
+
+// HasSession reports whether there is a session to try. It says nothing about
+// whether the server still honours it.
+func (c *Client) HasSession() bool { return c.session != "" }
+
+// Login signs in and returns the session token, which the client also keeps and
+// sends from then on. The server answers a wrong password, an unknown user and
+// an account with no password all with the same 401, so the caller cannot tell
+// them apart. Too many failures come back as 429.
+func (c *Client) Login(username, password string) (string, error) {
+	body := struct {
+		Username string `json:"username"`
+		Password string `json:"password"`
+	}{Username: username, Password: password}
+	req, err := c.newRequestWithBody(http.MethodPost, "/api/login", body)
+	if err != nil {
+		return "", err
+	}
+	// A stale session must not ride along on the request that replaces it.
+	req.Header.Del("Cookie")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 400 {
+		return "", statusError(resp)
+	}
+	for _, ck := range resp.Cookies() {
+		if ck.Name == SessionCookie && ck.Value != "" {
+			c.session = ck.Value
+			return ck.Value, nil
+		}
+	}
+	return "", fmt.Errorf("server signed us in but sent no %s cookie", SessionCookie)
+}
+
+// Logout ends the session on the server and forgets it here.
+func (c *Client) Logout() error {
+	req, err := c.newRequest(http.MethodPost, "/api/logout")
+	if err != nil {
+		return err
+	}
+	err = c.do(req, nil)
+	c.session = ""
+	return err
+}
+
+// authorize puts the session on a request.
+func (c *Client) authorize(req *http.Request) {
+	req.Header.Set("Accept", "application/json")
+	if c.session != "" {
+		req.AddCookie(&http.Cookie{Name: SessionCookie, Value: c.session})
+	}
+}
+
 func (c *Client) newRequest(method, path string) (*http.Request, error) {
 	req, err := http.NewRequest(method, c.baseURL+path, nil)
 	if err != nil {
 		return nil, err
 	}
-	req.Header.Set("Authorization", "Bearer "+c.apiKey)
-	req.Header.Set("Accept", "application/json")
+	c.authorize(req)
 	return req, nil
 }
 
@@ -51,6 +121,21 @@ func (e *StatusError) Error() string {
 	return fmt.Sprintf("server returned %d", e.Code)
 }
 
+// IsUnauthorized reports whether err is the server refusing the session: it
+// expired, was ended elsewhere, or belongs to an account since disabled.
+func IsUnauthorized(err error) bool {
+	var se *StatusError
+	return errors.As(err, &se) && se.Code == http.StatusUnauthorized
+}
+
+func statusError(resp *http.Response) error {
+	var e struct {
+		Error string `json:"error"`
+	}
+	_ = json.NewDecoder(resp.Body).Decode(&e)
+	return &StatusError{Code: resp.StatusCode, Message: e.Error}
+}
+
 func (c *Client) do(req *http.Request, out any) error {
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
@@ -59,11 +144,7 @@ func (c *Client) do(req *http.Request, out any) error {
 	defer resp.Body.Close()
 
 	if resp.StatusCode >= 400 {
-		var e struct {
-			Error string `json:"error"`
-		}
-		_ = json.NewDecoder(resp.Body).Decode(&e)
-		return &StatusError{Code: resp.StatusCode, Message: e.Error}
+		return statusError(resp)
 	}
 
 	if out != nil {
@@ -72,14 +153,18 @@ func (c *Client) do(req *http.Request, out any) error {
 	return nil
 }
 
-// ListAlerts fetches alerts. status may be "firing", "resolved", or "" for all.
+// ListAlerts fetches alerts. teamID limits them to one team; 0 means every team
+// the caller belongs to. status may be "firing", "resolved", or "" for all.
 // Set archived=true to fetch only archived alerts; false returns only non-archived.
 //
 // Alerts are read-only on the server — there is nothing to acknowledge or
 // archive here. This is the raw feed, useful for checking what Alertmanager is
 // actually sending; the work queue is ListIncidents.
-func (c *Client) ListAlerts(status string, archived bool, limit int) ([]Alert, error) {
+func (c *Client) ListAlerts(teamID int64, status string, archived bool, limit int) ([]Alert, error) {
 	q := url.Values{}
+	if teamID > 0 {
+		q.Set("team_id", strconv.FormatInt(teamID, 10))
+	}
 	if status != "" {
 		q.Set("status", status)
 	}
@@ -121,8 +206,7 @@ func (c *Client) newRequestWithBody(method, path string, body any) (*http.Reques
 	if err != nil {
 		return nil, err
 	}
-	req.Header.Set("Authorization", "Bearer "+c.apiKey)
-	req.Header.Set("Accept", "application/json")
+	c.authorize(req)
 	req.Header.Set("Content-Type", "application/json")
 	return req, nil
 }
@@ -138,12 +222,16 @@ func (c *Client) GetAlert(id int64) (*Alert, error) {
 
 // ── Incidents ──────────────────────────────────────────────────────────────
 
-// ListIncidents fetches the work queue. status may be "triggered",
+// ListIncidents fetches the work queue. teamID limits it to one team; 0 means
+// every team the caller belongs to. status may be "triggered",
 // "acknowledged", "resolved", or "" for the server default of open incidents
 // only. archived and snoozed each switch the list to that set rather than
 // adding to it, matching the server's filters.
-func (c *Client) ListIncidents(status string, archived, snoozed bool, limit int) ([]Incident, error) {
+func (c *Client) ListIncidents(teamID int64, status string, archived, snoozed bool, limit int) ([]Incident, error) {
 	q := url.Values{}
+	if teamID > 0 {
+		q.Set("team_id", strconv.FormatInt(teamID, 10))
+	}
 	if status != "" {
 		q.Set("status", status)
 	}
@@ -329,8 +417,37 @@ func (c *Client) GetStatsByDay() ([]DayStat, error) {
 	return result, c.do(req, &result)
 }
 
-func (c *Client) GetSchedule(from, to string) ([]ScheduleEntry, error) {
-	req, err := c.newRequest(http.MethodGet, fmt.Sprintf("/api/schedule?from=%s&to=%s", from, to))
+// ── Teams ──────────────────────────────────────────────────────────────────
+
+// ListTeams returns the teams the caller belongs to, with the caller's role in
+// each. Everything else the server returns is scoped to these. A server that
+// predates teams (v0.12) answers 404, which is how the TUI spots one.
+func (c *Client) ListTeams() ([]Team, error) {
+	req, err := c.newRequest(http.MethodGet, "/api/teams")
+	if err != nil {
+		return nil, err
+	}
+	var teams []Team
+	return teams, c.do(req, &teams)
+}
+
+// ListTeamMembers returns who belongs to a team. A schedule can only be given to
+// its own members, so this is the assignee list for one.
+func (c *Client) ListTeamMembers(teamID int64) ([]TeamMember, error) {
+	req, err := c.newRequest(http.MethodGet, fmt.Sprintf("/api/teams/%d/members", teamID))
+	if err != nil {
+		return nil, err
+	}
+	var members []TeamMember
+	return members, c.do(req, &members)
+}
+
+// ── Schedule ───────────────────────────────────────────────────────────────
+
+// GetSchedule returns a team's on-call entries between two YYYY-MM-DD dates.
+func (c *Client) GetSchedule(teamID int64, from, to string) ([]ScheduleEntry, error) {
+	q := url.Values{"from": {from}, "to": {to}}
+	req, err := c.newRequest(http.MethodGet, fmt.Sprintf("/api/teams/%d/schedule?%s", teamID, q.Encode()))
 	if err != nil {
 		return nil, err
 	}
@@ -338,49 +455,30 @@ func (c *Client) GetSchedule(from, to string) ([]ScheduleEntry, error) {
 	return entries, c.do(req, &entries)
 }
 
-// GetCurrentOnCall returns today's on-call entry, or nil if nobody is scheduled.
-func (c *Client) GetCurrentOnCall() (*ScheduleEntry, error) {
+// GetCurrentOnCall returns today's on-call entries, one per team that has
+// somebody scheduled. It is empty, not an error, when nobody is.
+func (c *Client) GetCurrentOnCall() ([]ScheduleEntry, error) {
 	req, err := c.newRequest(http.MethodGet, "/api/schedule/current")
 	if err != nil {
 		return nil, err
 	}
-	resp, err := c.httpClient.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-	if resp.StatusCode == http.StatusNotFound {
-		return nil, nil
-	}
-	if resp.StatusCode >= 400 {
-		var e struct {
-			Error string `json:"error"`
-		}
-		_ = json.NewDecoder(resp.Body).Decode(&e)
-		if e.Error != "" {
-			return nil, fmt.Errorf("server returned %d: %s", resp.StatusCode, e.Error)
-		}
-		return nil, fmt.Errorf("server returned %d", resp.StatusCode)
-	}
-	var entry ScheduleEntry
-	if err := json.NewDecoder(resp.Body).Decode(&entry); err != nil {
-		return nil, err
-	}
-	return &entry, nil
+	var entries []ScheduleEntry
+	return entries, c.do(req, &entries)
 }
 
-// AssignSchedule puts one user on call for the given dates.
+// AssignSchedule puts one team member on call for the given dates. Only a team
+// owner or an administrator may.
 //
 // The server holds one person per day and refuses a date somebody already has,
 // so replace is what takes a shift off its current holder. It is all-or-nothing
 // either way: a week of free and taken days moves as a unit, or not at all.
-func (c *Client) AssignSchedule(userID int64, dates []string, replace bool) ([]ScheduleEntry, error) {
+func (c *Client) AssignSchedule(teamID, userID int64, dates []string, replace bool) ([]ScheduleEntry, error) {
 	body := struct {
 		UserID  int64    `json:"user_id"`
 		Dates   []string `json:"dates"`
 		Replace bool     `json:"replace,omitempty"`
 	}{UserID: userID, Dates: dates, Replace: replace}
-	req, err := c.newRequestWithBody(http.MethodPost, "/api/schedule", body)
+	req, err := c.newRequestWithBody(http.MethodPost, fmt.Sprintf("/api/teams/%d/schedule", teamID), body)
 	if err != nil {
 		return nil, err
 	}
@@ -388,14 +486,16 @@ func (c *Client) AssignSchedule(userID int64, dates []string, replace bool) ([]S
 	return entries, c.do(req, &entries)
 }
 
-func (c *Client) DeleteScheduleEntry(id int64) error {
-	req, err := c.newRequest(http.MethodDelete, fmt.Sprintf("/api/schedule/%d", id))
+func (c *Client) DeleteScheduleEntry(teamID, id int64) error {
+	req, err := c.newRequest(http.MethodDelete, fmt.Sprintf("/api/teams/%d/schedule/%d", teamID, id))
 	if err != nil {
 		return err
 	}
 	return c.do(req, nil)
 }
 
+// ── Users ──────────────────────────────────────────────────────────────────
+
 func (c *Client) ListUsers() ([]User, error) {
 	req, err := c.newRequest(http.MethodGet, "/api/users")
 	if err != nil {
@@ -464,7 +564,7 @@ func (c *Client) DeleteAPIKey(userID, keyID int64) error {
 }
 
 // Me returns the user the API key belongs to, and whether they have a web UI
-// password. Needs terdut-server v0.10.2 or later; older servers answer 404.
+// password.
 func (c *Client) Me() (*Me, error) {
 	req, err := c.newRequest(http.MethodGet, "/api/me")
 	if err != nil {
@@ -488,7 +588,8 @@ func (c *Client) SetPassword(userID int64, password, current string) error {
 	return c.do(req, nil)
 }
 
-// HealthCheck calls GET /healthz (unauthenticated path, no auth needed but we send it anyway).
+// HealthCheck calls GET /healthz, which is unauthenticated and does no database
+// check, so it says the process is up, not that the API key works.
 func (c *Client) HealthCheck() error {
 	req, err := http.NewRequest(http.MethodGet, c.baseURL+"/healthz", nil)
 	if err != nil {

internal/api/client_test.go

@@ -19,7 +19,9 @@ type call struct {
 	path   string
 	query  string
 	body   string
-	auth   string
+	cookie string
+	// authz is the Authorization header, which the client no longer sends at all.
+	authz string
 }
 
 // stub serves one canned response and records the request that fetched it.
@@ -29,22 +31,107 @@ func stub(t *testing.T, status int, response string) (*Client, *call) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		body, _ := io.ReadAll(r.Body)
 		got.method, got.path, got.query = r.Method, r.URL.Path, r.URL.RawQuery
-		got.body, got.auth = string(body), r.Header.Get("Authorization")
+		got.body, got.authz = string(body), r.Header.Get("Authorization")
+		if ck, err := r.Cookie(SessionCookie); err == nil {
+			got.cookie = ck.Value
+		}
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(status)
 		io.WriteString(w, response)
 	}))
 	t.Cleanup(srv.Close)
-	return NewClient(srv.URL, "test-key"), got
+	c := NewClient(srv.URL)
+	c.SetSession("test-session")
+	return c, got
 }
 
-func TestClient_SendsBearerToken(t *testing.T) {
+func TestClient_SendsTheSessionCookie(t *testing.T) {
 	c, got := stub(t, http.StatusOK, `[]`)
-	if _, err := c.ListIncidents("", false, false, 0); err != nil {
+	if _, err := c.ListIncidents(0, "", false, false, 0); err != nil {
 		t.Fatalf("list: %v", err)
 	}
-	if got.auth != "Bearer test-key" {
-		t.Errorf("expected bearer token, got %q", got.auth)
+	if got.cookie != "test-session" {
+		t.Errorf("expected the session cookie, got %q", got.cookie)
+	}
+	// The server judges a request with an Authorization header on that alone and
+	// never falls back to the cookie, so sending one would defeat the session.
+	if got.authz != "" {
+		t.Errorf("expected no Authorization header, got %q", got.authz)
+	}
+}
+
+// Login has to work over plain http, where a cookie jar would discard the
+// Secure cookie a server behind https sets.
+func TestLogin_KeepsTheSessionFromTheCookie(t *testing.T) {
+	var body string
+	var sentCookie bool
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b, _ := io.ReadAll(r.Body)
+		body = string(b)
+		_, err := r.Cookie(SessionCookie)
+		sentCookie = err == nil
+		http.SetCookie(w, &http.Cookie{Name: SessionCookie, Value: "fresh", Path: "/", HttpOnly: true, Secure: true})
+		w.WriteHeader(http.StatusOK)
+		io.WriteString(w, `{"user":{"id":1},"has_password":true}`)
+	}))
+	t.Cleanup(srv.Close)
+
+	c := NewClient(srv.URL)
+	c.SetSession("stale")
+	token, err := c.Login("niklas", "correct horse")
+	if err != nil {
+		t.Fatalf("login: %v", err)
+	}
+	if token != "fresh" || !c.HasSession() {
+		t.Errorf("expected the new token to be kept, got %q", token)
+	}
+	if body != `{"username":"niklas","password":"correct horse"}` {
+		t.Errorf("unexpected body %q", body)
+	}
+	if sentCookie {
+		t.Error("a stale session must not ride along on the login that replaces it")
+	}
+}
+
+func TestLogin_RefusalCarriesTheServersWords(t *testing.T) {
+	c, _ := stub(t, http.StatusUnauthorized, `{"error":"invalid username or password"}`)
+	_, err := c.Login("niklas", "wrong")
+	if !IsUnauthorized(err) || !strings.Contains(err.Error(), "invalid username or password") {
+		t.Errorf("expected the server's 401 message, got %v", err)
+	}
+
+	c, _ = stub(t, http.StatusTooManyRequests, `{"error":"too many attempts"}`)
+	if _, err := c.Login("niklas", "wrong"); err == nil || IsUnauthorized(err) {
+		t.Errorf("a rate limit is not an authentication failure, got %v", err)
+	}
+}
+
+func TestLogin_NoCookieIsAnError(t *testing.T) {
+	c, _ := stub(t, http.StatusOK, `{}`)
+	if _, err := c.Login("niklas", "pw"); err == nil {
+		t.Error("a 200 without a session cookie is not a sign-in")
+	}
+}
+
+func TestLogout_ForgetsTheSession(t *testing.T) {
+	c, got := stub(t, http.StatusNoContent, ``)
+	if err := c.Logout(); err != nil {
+		t.Fatalf("logout: %v", err)
+	}
+	if got.method != "POST" || got.path != "/api/logout" || got.cookie != "test-session" {
+		t.Errorf("unexpected request %s %s cookie=%q", got.method, got.path, got.cookie)
+	}
+	if c.HasSession() {
+		t.Error("the session should be gone locally")
+	}
+}
+
+func TestIsUnauthorized(t *testing.T) {
+	if !IsUnauthorized(&StatusError{Code: 401}) {
+		t.Error("a 401 is unauthorized")
+	}
+	if IsUnauthorized(&StatusError{Code: 403}) || IsUnauthorized(errors.New("x")) || IsUnauthorized(nil) {
+		t.Error("only a 401 means the session is refused; a 403 is a permission")
 	}
 }
 
@@ -108,23 +195,26 @@ func TestClient_IncidentEndpoints(t *testing.T) {
 func TestListIncidents_Filters(t *testing.T) {
 	tests := []struct {
 		name     string
+		teamID   int64
 		status   string
 		archived bool
 		snoozed  bool
 		limit    int
 		want     string
 	}{
-		{"default is the open queue", "", false, false, 0, ""},
-		{"status", "triggered", false, false, 0, "status=triggered"},
-		{"archived", "resolved", true, false, 0, "archived=true&status=resolved"},
-		{"snoozed", "", false, true, 0, "snoozed=true"},
-		{"limit", "", false, false, 500, "limit=500"},
+		{"default is the open queue", 0, "", false, false, 0, ""},
+		{"status", 0, "triggered", false, false, 0, "status=triggered"},
+		{"archived", 0, "resolved", true, false, 0, "archived=true&status=resolved"},
+		{"snoozed", 0, "", false, true, 0, "snoozed=true"},
+		{"limit", 0, "", false, false, 500, "limit=500"},
+		{"one team", 4, "", false, false, 0, "team_id=4"},
+		{"no team means all of them", 0, "triggered", false, false, 0, "status=triggered"},
 	}
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			c, got := stub(t, http.StatusOK, `[]`)
-			if _, err := c.ListIncidents(tt.status, tt.archived, tt.snoozed, tt.limit); err != nil {
+			if _, err := c.ListIncidents(tt.teamID, tt.status, tt.archived, tt.snoozed, tt.limit); err != nil {
 				t.Fatalf("list: %v", err)
 			}
 			if got.query != tt.want {
@@ -171,9 +261,12 @@ func TestClient_RequestBodies(t *testing.T) {
 	// wire when asked for — and stay off it when not.
 	t.Run("assign schedule", func(t *testing.T) {
 		c, got := stub(t, http.StatusCreated, `[]`)
-		if _, err := c.AssignSchedule(3, []string{"2026-07-27"}, false); err != nil {
+		if _, err := c.AssignSchedule(9, 3, []string{"2026-07-27"}, false); err != nil {
 			t.Fatalf("assign: %v", err)
 		}
+		if got.method != "POST" || got.path != "/api/teams/9/schedule" {
+			t.Errorf("expected POST /api/teams/9/schedule, got %s %s", got.method, got.path)
+		}
 		if got.body != `{"user_id":3,"dates":["2026-07-27"]}` {
 			t.Errorf("unexpected body %q", got.body)
 		}
@@ -181,7 +274,7 @@ func TestClient_RequestBodies(t *testing.T) {
 
 	t.Run("assign schedule with replace", func(t *testing.T) {
 		c, got := stub(t, http.StatusCreated, `[]`)
-		if _, err := c.AssignSchedule(3, []string{"2026-07-27"}, true); err != nil {
+		if _, err := c.AssignSchedule(9, 3, []string{"2026-07-27"}, true); err != nil {
 			t.Fatalf("assign: %v", err)
 		}
 		if got.body != `{"user_id":3,"dates":["2026-07-27"],"replace":true}` {
@@ -247,15 +340,91 @@ func TestClient_ErrorWithoutBody(t *testing.T) {
 	}
 }
 
-// Nobody on call is a normal state, not a failure.
-func TestGetCurrentOnCall_404IsNotAnError(t *testing.T) {
-	c, _ := stub(t, http.StatusNotFound, `{"error":"no one is on call today"}`)
-	entry, err := c.GetCurrentOnCall()
+// Nobody on call is a normal state, not a failure: the server answers with an
+// empty list, one entry per team that has somebody scheduled.
+func TestGetCurrentOnCall_ListsOnePerTeam(t *testing.T) {
+	c, got := stub(t, http.StatusOK, `[
+		{"id":1,"team_id":1,"team_name":"Ops","user_id":5,"username":"alice","date":"2026-09-23"},
+		{"id":2,"team_id":2,"team_name":"Dev","user_id":6,"username":"bob","date":"2026-09-23"}]`)
+	entries, err := c.GetCurrentOnCall()
 	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
+		t.Fatalf("on call: %v", err)
 	}
-	if entry != nil {
-		t.Errorf("expected nil entry, got %+v", entry)
+	if got.path != "/api/schedule/current" {
+		t.Errorf("unexpected path %q", got.path)
+	}
+	if len(entries) != 2 || entries[0].TeamName != "Ops" || entries[1].Username != "bob" {
+		t.Errorf("unexpected entries %+v", entries)
+	}
+
+	c, _ = stub(t, http.StatusOK, `[]`)
+	if entries, err := c.GetCurrentOnCall(); err != nil || len(entries) != 0 {
+		t.Errorf("expected no entries and no error, got %v, %v", entries, err)
+	}
+}
+
+// Schedules belong to a team, so every call for one has to say which.
+func TestSchedule_IsPerTeam(t *testing.T) {
+	c, got := stub(t, http.StatusOK, `[]`)
+	if _, err := c.GetSchedule(7, "2026-09-21", "2026-09-27"); err != nil {
+		t.Fatalf("get schedule: %v", err)
+	}
+	if got.path != "/api/teams/7/schedule" || got.query != "from=2026-09-21&to=2026-09-27" {
+		t.Errorf("unexpected request %s?%s", got.path, got.query)
+	}
+
+	c, got = stub(t, http.StatusNoContent, ``)
+	if err := c.DeleteScheduleEntry(7, 12); err != nil {
+		t.Fatalf("delete: %v", err)
+	}
+	if got.method != "DELETE" || got.path != "/api/teams/7/schedule/12" {
+		t.Errorf("unexpected request %s %s", got.method, got.path)
+	}
+}
+
+func TestTeams(t *testing.T) {
+	c, got := stub(t, http.StatusOK, `[{"id":3,"name":"Ops","created_at":"2026-09-20T10:00:00Z","role":"owner"}]`)
+	teams, err := c.ListTeams()
+	if err != nil {
+		t.Fatalf("list teams: %v", err)
+	}
+	if got.path != "/api/teams" || len(teams) != 1 || teams[0].Role != RoleOwner || teams[0].Name != "Ops" {
+		t.Errorf("unexpected %s %+v", got.path, teams)
+	}
+
+	c, got = stub(t, http.StatusOK, `[{"team_id":3,"user_id":5,"username":"alice","role":"member"}]`)
+	members, err := c.ListTeamMembers(3)
+	if err != nil {
+		t.Fatalf("list members: %v", err)
+	}
+	if got.path != "/api/teams/3/members" || len(members) != 1 || members[0].UserID != 5 {
+		t.Errorf("unexpected %s %+v", got.path, members)
+	}
+}
+
+// A server that predates teams has no /api/teams, and the TUI recognises one by
+// that 404, so it must come back as a StatusError carrying the code.
+func TestListTeams_OldServerIs404(t *testing.T) {
+	c, _ := stub(t, http.StatusNotFound, `{"error":"not found"}`)
+	_, err := c.ListTeams()
+	var se *StatusError
+	if !errors.As(err, &se) || se.Code != http.StatusNotFound {
+		t.Errorf("expected a 404 StatusError, got %v", err)
+	}
+}
+
+func TestUser_DecodesAdminAndDisabled(t *testing.T) {
+	var u User
+	if err := json.Unmarshal([]byte(
+		`{"id":1,"username":"a","is_admin":true,"disabled_at":"2026-09-22T08:00:00Z"}`), &u); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if !u.IsAdmin || !u.IsDisabled() {
+		t.Errorf("expected an admin who is disabled, got %+v", u)
+	}
+	var other User
+	if err := json.Unmarshal([]byte(`{"id":2,"username":"b","is_admin":false}`), &other); err != nil || other.IsDisabled() {
+		t.Errorf("a user with no disabled_at must not be disabled")
 	}
 }
 
@@ -340,7 +509,7 @@ func TestAlert_DecodesIncidentLink(t *testing.T) {
 
 func TestListAlerts_ArchivedFilter(t *testing.T) {
 	c, got := stub(t, http.StatusOK, `[]`)
-	if _, err := c.ListAlerts("", true, 50); err != nil {
+	if _, err := c.ListAlerts(0, "", true, 50); err != nil {
 		t.Fatalf("list alerts: %v", err)
 	}
 	if got.path != "/api/alerts" || got.query != "archived=true&limit=50" {

internal/api/types.go

@@ -7,6 +7,8 @@ import "time"
 // alert belongs to.
 type Alert struct {
 	ID           int64             `json:"id"`
+	TeamID       int64             `json:"team_id"`
+	TeamName     string            `json:"team_name,omitempty"`
 	Fingerprint  string            `json:"fingerprint"`
 	Name         string            `json:"name"`
 	Status       string            `json:"status"`
@@ -25,7 +27,8 @@ type Alert struct {
 
 	// ResolutionSource records why a resolved alert left the firing state:
 	// "alertmanager" for a real resolved webhook, "expiry" when the server
-	// inferred it after the alert stopped being refreshed.
+	// inferred it after the alert stopped being refreshed, "deadman" for a
+	// dead man's switch that came back. Treat the value set as open.
 	ResolutionSource *string `json:"resolution_source,omitempty"`
 }
 
@@ -41,6 +44,8 @@ const (
 // groupKey Alertmanager computed from the operator's group_by configuration.
 type Incident struct {
 	ID          int64             `json:"id"`
+	TeamID      int64             `json:"team_id"`
+	TeamName    string            `json:"team_name,omitempty"`
 	GroupKey    string            `json:"group_key"`
 	Title       string            `json:"title"`
 	GroupLabels map[string]string `json:"group_labels"`
@@ -63,10 +68,17 @@ type Incident struct {
 
 	ResolvedAt *time.Time `json:"resolved_at,omitempty"`
 
-	// ResolutionSource is "alerts" when every alert stopped firing, or "manual"
-	// when a person closed it. Treat the value set as open.
+	// ResolutionSource is "alerts" when every alert stopped firing, "manual"
+	// when a person closed it, or "recovered" when a dead man's switch came back.
+	// Treat the value set as open.
 	ResolutionSource *string `json:"resolution_source,omitempty"`
 
+	// EscalationLevel is how far up the team's escalation ladder the incident has
+	// climbed (0 = not escalated). EscalationDueAt is when the next step fires,
+	// and is nil once the ladder is exhausted or the incident is acknowledged.
+	EscalationLevel int        `json:"escalation_level"`
+	EscalationDueAt *time.Time `json:"escalation_due_at,omitempty"`
+
 	ArchivedAt *time.Time `json:"archived_at,omitempty"`
 
 	// Alerts is populated by GET /api/incidents/{id} only.
@@ -96,6 +108,9 @@ const (
 	EventResolved       = "resolved"
 	EventNote           = "note"
 
+	// Written when a team's dead man's switch stops reporting.
+	EventDeadmanSilent = "deadman_silent"
+
 	// Written by the server's notifier from the delivery result, not at enqueue.
 	// Detail carries the notification kind ("triggered", "reminder", "resolved"),
 	// and on a failure the reason after it. An absent user means the page went to
@@ -154,6 +169,8 @@ type DayStat struct {
 
 type ScheduleEntry struct {
 	ID        int64     `json:"id"`
+	TeamID    int64     `json:"team_id"`
+	TeamName  string    `json:"team_name,omitempty"`
 	UserID    int64     `json:"user_id"`
 	Username  string    `json:"username"`
 	Date      string    `json:"date"` // YYYY-MM-DD
@@ -166,6 +183,14 @@ type User struct {
 	Email     string    `json:"email"`
 	CreatedAt time.Time `json:"created_at"`
 
+	// IsAdmin marks a system administrator: the only kind of user who can create
+	// or delete users and act on other people's passwords and keys.
+	IsAdmin bool `json:"is_admin"`
+
+	// DisabledAt is set when an administrator has disabled the account. A
+	// disabled user cannot sign in or use their keys.
+	DisabledAt *time.Time `json:"disabled_at,omitempty"`
+
 	// NtfyTopic is where this user's push notifications go. Nil and empty mean
 	// the same thing — no topic of their own — because the server stores a blank
 	// string as NULL. Their incidents fall back to the server's shared fallback
@@ -182,12 +207,40 @@ func (u User) Topic() string {
 	return *u.NtfyTopic
 }
 
+// IsDisabled reports whether the account has been disabled.
+func (u User) IsDisabled() bool { return u.DisabledAt != nil }
+
 // Me is GET /api/me: the caller, and whether they can sign in to the web UI.
 type Me struct {
 	User        User `json:"user"`
 	HasPassword bool `json:"has_password"`
 }
 
+// Team roles.
+const (
+	RoleOwner  = "owner"
+	RoleMember = "member"
+)
+
+// Team is a group that owns integrations, incidents, a schedule and an
+// escalation ladder. Role is the caller's role in it, and is only present on
+// the caller's own team lists (GET /api/teams).
+type Team struct {
+	ID        int64     `json:"id"`
+	Name      string    `json:"name"`
+	CreatedAt time.Time `json:"created_at"`
+	Role      string    `json:"role,omitempty"`
+}
+
+// TeamMember is one person's membership of a team.
+type TeamMember struct {
+	TeamID   int64     `json:"team_id"`
+	UserID   int64     `json:"user_id"`
+	Username string    `json:"username"`
+	Role     string    `json:"role"`
+	JoinedAt time.Time `json:"joined_at"`
+}
+
 type APIKey struct {
 	ID         int64      `json:"id"`
 	UserID     int64      `json:"user_id"`

internal/config/config.go

@@ -13,16 +13,26 @@ const defaultRefreshInterval = 30 * time.Second
 
 type Config struct {
 	ServerURL       string
-	APIKey          string
+	Username        string // optional, prefills the sign-in form
 	RefreshInterval time.Duration
 	Theme           string
+
+	// LegacyAPIKey is set when the file still has an `api_key`. The TUI signs in
+	// with a user account now and ignores it; this is only so it can say so.
+	LegacyAPIKey bool
+
+	// Team is the team to start on, by name or id. Empty shows every team the
+	// key's user belongs to.
+	Team string
 }
 
 type rawConfig struct {
 	ServerURL       string `yaml:"server_url"`
-	APIKey          string `yaml:"api_key"`
+	Username        string `yaml:"username,omitempty"`
+	APIKey          string `yaml:"api_key,omitempty"`          // no longer used; see Config.LegacyAPIKey
 	RefreshInterval int    `yaml:"refresh_interval,omitempty"` // seconds
 	Theme           string `yaml:"theme,omitempty"`
+	Team            string `yaml:"team,omitempty"`
 }
 
 func Load() (*Config, error) {
@@ -35,7 +45,7 @@ func Load() (*Config, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
 		if os.IsNotExist(err) {
-			return nil, fmt.Errorf("config file not found at %s\n\nCreate it with:\n  server_url: https://terdut.example.com\n  api_key: <your-api-key>\n  theme: gruvbox-dark  # optional", path)
+			return nil, fmt.Errorf("config file not found at %s\n\nCreate it with:\n  server_url: https://terdut.example.com\n  username: <your-username>  # optional, prefills the sign-in form\n  theme: gruvbox-dark  # optional\n  team: Ops            # optional, team to start on", path)
 		}
 		return nil, fmt.Errorf("cannot read config file: %w", err)
 	}
@@ -48,9 +58,6 @@ func Load() (*Config, error) {
 	if raw.ServerURL == "" {
 		return nil, fmt.Errorf("config: 'server_url' is required")
 	}
-	if raw.APIKey == "" {
-		return nil, fmt.Errorf("config: 'api_key' is required")
-	}
 
 	interval := defaultRefreshInterval
 	if raw.RefreshInterval > 0 {
@@ -59,8 +66,10 @@ func Load() (*Config, error) {
 
 	return &Config{
 		ServerURL:       raw.ServerURL,
-		APIKey:          raw.APIKey,
+		Username:        raw.Username,
+		LegacyAPIKey:    raw.APIKey != "",
 		RefreshInterval: interval,
 		Theme:           raw.Theme,
+		Team:            raw.Team,
 	}, nil
 }

internal/config/config_test.go

@@ -0,0 +1,61 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func writeConfig(t *testing.T, body string) {
+	t.Helper()
+	dir := t.TempDir()
+	t.Setenv("XDG_CONFIG_HOME", dir)
+	if err := os.MkdirAll(filepath.Join(dir, "terdut-tui"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(dir, "terdut-tui", "config.yaml"), []byte(body), 0o600); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestLoad_TeamIsOptional(t *testing.T) {
+	writeConfig(t, "server_url: https://terdut.example.com\n")
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if cfg.Team != "" {
+		t.Errorf("expected no default team, got %q", cfg.Team)
+	}
+
+	writeConfig(t, "server_url: https://terdut.example.com\nteam: Ops\n")
+	cfg, err = Load()
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if cfg.Team != "Ops" {
+		t.Errorf("expected team Ops, got %q", cfg.Team)
+	}
+}
+
+// Signing in replaced the API key, so a config that has only a server URL is
+// complete, and one that still carries an api_key is noted rather than refused.
+func TestLoad_NoAPIKeyNeeded(t *testing.T) {
+	writeConfig(t, "server_url: https://terdut.example.com\nusername: niklas\n")
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if cfg.Username != "niklas" || cfg.LegacyAPIKey {
+		t.Errorf("unexpected config %+v", cfg)
+	}
+
+	writeConfig(t, "server_url: https://terdut.example.com\napi_key: old\n")
+	cfg, err = Load()
+	if err != nil {
+		t.Fatalf("a leftover api_key must not stop the TUI starting: %v", err)
+	}
+	if !cfg.LegacyAPIKey {
+		t.Error("expected the leftover api_key to be noted")
+	}
+}

internal/session/session.go

@@ -0,0 +1,98 @@
+// Package session keeps the signed-in session between runs, so the TUI does not
+// ask for a password every time it starts.
+//
+// What is stored is the server's session token, not the password: it is what the
+// web UI keeps in a cookie, it expires on the server's schedule (30 days, sliding
+// with use) and signing out or a password change ends it. It is still a
+// credential, so the file is readable by its owner only.
+package session
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type file struct {
+	ServerURL string `json:"server_url"`
+	Token     string `json:"token"`
+}
+
+func path() (string, error) {
+	dir, err := os.UserConfigDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(dir, "terdut-tui", "session.json"), nil
+}
+
+// normalise makes two spellings of one server compare equal.
+func normalise(serverURL string) string {
+	return strings.TrimRight(serverURL, "/")
+}
+
+// Load returns the saved token for serverURL, or "" when there is none. A session
+// saved for a different server is not offered to this one, and an unreadable file
+// is the same as no file: the worst outcome is being asked to sign in.
+func Load(serverURL string) string {
+	p, err := path()
+	if err != nil {
+		return ""
+	}
+	data, err := os.ReadFile(p)
+	if err != nil {
+		return ""
+	}
+	var f file
+	if json.Unmarshal(data, &f) != nil || normalise(f.ServerURL) != normalise(serverURL) {
+		return ""
+	}
+	return f.Token
+}
+
+// Save stores the token for serverURL, replacing whatever was there.
+func Save(serverURL, token string) error {
+	p, err := path()
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(filepath.Dir(p), 0o700); err != nil {
+		return err
+	}
+	data, err := json.Marshal(file{ServerURL: normalise(serverURL), Token: token})
+	if err != nil {
+		return err
+	}
+	// Written beside the target and renamed over it, so a crash cannot leave a
+	// half-written token, and created 0600 so it is never briefly world-readable.
+	tmp, err := os.CreateTemp(filepath.Dir(p), ".session-*")
+	if err != nil {
+		return err
+	}
+	defer os.Remove(tmp.Name())
+	if err := os.Chmod(tmp.Name(), 0o600); err != nil {
+		tmp.Close()
+		return err
+	}
+	if _, err := tmp.Write(data); err != nil {
+		tmp.Close()
+		return err
+	}
+	if err := tmp.Close(); err != nil {
+		return err
+	}
+	return os.Rename(tmp.Name(), p)
+}
+
+// Clear forgets the saved session. Having none to forget is not an error.
+func Clear() error {
+	p, err := path()
+	if err != nil {
+		return err
+	}
+	if err := os.Remove(p); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	return nil
+}

internal/session/session_test.go

@@ -0,0 +1,92 @@
+package session
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func isolate(t *testing.T) {
+	t.Helper()
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+}
+
+func TestSaveThenLoad(t *testing.T) {
+	isolate(t)
+	if got := Load("https://terdut.example.com"); got != "" {
+		t.Fatalf("expected no session yet, got %q", got)
+	}
+	if err := Save("https://terdut.example.com", "tok"); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+	if got := Load("https://terdut.example.com"); got != "tok" {
+		t.Errorf("expected tok, got %q", got)
+	}
+	// A trailing slash is the same server.
+	if got := Load("https://terdut.example.com/"); got != "tok" {
+		t.Errorf("a trailing slash should not lose the session, got %q", got)
+	}
+}
+
+// A token is only ever valid for the server that issued it; offering it to a
+// different one would send a credential to somebody it was never meant for.
+func TestLoadIgnoresAnotherServersSession(t *testing.T) {
+	isolate(t)
+	if err := Save("https://a.example.com", "tok"); err != nil {
+		t.Fatal(err)
+	}
+	if got := Load("https://b.example.com"); got != "" {
+		t.Errorf("a session for another server must not be reused, got %q", got)
+	}
+}
+
+func TestSaveIsOwnerOnly(t *testing.T) {
+	isolate(t)
+	if err := Save("https://a.example.com", "tok"); err != nil {
+		t.Fatal(err)
+	}
+	p, _ := path()
+	info, err := os.Stat(p)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if perm := info.Mode().Perm(); perm != 0o600 {
+		t.Errorf("the session file holds a credential and must be 0600, got %o", perm)
+	}
+	entries, _ := os.ReadDir(filepath.Dir(p))
+	for _, e := range entries {
+		if e.Name() != "session.json" {
+			t.Errorf("a temporary file was left behind: %s", e.Name())
+		}
+	}
+}
+
+func TestClear(t *testing.T) {
+	isolate(t)
+	if err := Clear(); err != nil {
+		t.Errorf("clearing nothing is not an error, got %v", err)
+	}
+	if err := Save("https://a.example.com", "tok"); err != nil {
+		t.Fatal(err)
+	}
+	if err := Clear(); err != nil {
+		t.Fatalf("clear: %v", err)
+	}
+	if got := Load("https://a.example.com"); got != "" {
+		t.Errorf("expected the session gone, got %q", got)
+	}
+}
+
+func TestLoadToleratesGarbage(t *testing.T) {
+	isolate(t)
+	p, _ := path()
+	if err := os.MkdirAll(filepath.Dir(p), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(p, []byte("{not json"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if got := Load("https://a.example.com"); got != "" {
+		t.Errorf("an unreadable file means no session, got %q", got)
+	}
+}

internal/tui/login_test.go

@@ -0,0 +1,242 @@
+package tui
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"git.ryuvia.com/niklas/terdut-tui/internal/api"
+	"git.ryuvia.com/niklas/terdut-tui/internal/session"
+	"git.ryuvia.com/niklas/terdut-tui/internal/theme"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+// signedOut is a model with no session, so it starts on the sign-in form.
+func signedOut(serverURL string) Model {
+	m := NewModel(api.NewClient(serverURL), serverURL, time.Minute, theme.GruvboxDark)
+	m.width, m.height = 120, 40
+	return m
+}
+
+func TestStartsOnTheFormWithoutASession(t *testing.T) {
+	m := signedOut("http://test")
+	if m.mode != modeLogin {
+		t.Fatalf("expected the sign-in form, got mode %v", m.mode)
+	}
+	if m.Init() != nil {
+		t.Error("with no session there is nothing to connect with yet")
+	}
+}
+
+func TestStartsConnectedWithASavedSession(t *testing.T) {
+	c := api.NewClient("http://test")
+	c.SetSession("saved")
+	m := NewModel(c, "http://test", time.Minute, theme.GruvboxDark)
+	if m.mode == modeLogin {
+		t.Fatal("a saved session should be tried before asking for a password")
+	}
+	if m.Init() == nil {
+		t.Error("expected the saved session to be tried on start")
+	}
+}
+
+func TestLoginForm_ChecksBothFieldsBeforeSending(t *testing.T) {
+	m := signedOut("http://test")
+	m, cmd := press(t, m, "enter")
+	if cmd != nil || m.loggingIn || !strings.Contains(m.loginErr, "username") {
+		t.Errorf("an empty form must not be sent, got err %q", m.loginErr)
+	}
+
+	m = typeInto(t, m, "niklas")
+	m, cmd = press(t, m, "enter")
+	if cmd != nil || m.loggingIn || !strings.Contains(m.loginErr, "password") {
+		t.Errorf("a missing password must not be sent, got err %q", m.loginErr)
+	}
+}
+
+func TestLoginForm_QIsTypedNotQuit(t *testing.T) {
+	m := signedOut("http://test")
+	m = typeInto(t, m, "quentin")
+	if got := m.loginInputs[loginUsername].Value(); got != "quentin" {
+		t.Errorf("q is a letter in a username, got %q", got)
+	}
+}
+
+// The whole flow against a server: type both fields, submit, and the session is
+// kept for the next run.
+func TestLogin_SignsInAndSavesTheSession(t *testing.T) {
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		b, _ := io.ReadAll(r.Body)
+		if r.URL.Path != "/api/login" || string(b) != `{"username":"niklas","password":"secret-pass"}` {
+			t.Errorf("unexpected request %s %s", r.URL.Path, b)
+		}
+		http.SetCookie(w, &http.Cookie{Name: api.SessionCookie, Value: "tok-1", Path: "/"})
+		io.WriteString(w, `{}`)
+	}))
+	t.Cleanup(srv.Close)
+
+	m := signedOut(srv.URL)
+	m = typeInto(t, m, "niklas")
+	m, _ = press(t, m, "tab")
+	m = typeInto(t, m, "secret-pass")
+	m, cmd := press(t, m, "enter")
+	if !m.loggingIn || cmd == nil {
+		t.Fatal("expected the sign-in to be under way")
+	}
+
+	msg := cmd()
+	if _, ok := msg.(loginDoneMsg); !ok {
+		t.Fatalf("expected loginDoneMsg, got %#v", msg)
+	}
+	if got := session.Load(srv.URL); got != "tok-1" {
+		t.Errorf("expected the session saved for next time, got %q", got)
+	}
+
+	next, connect := m.Update(msg)
+	m = next.(Model)
+	if m.mode != modeDashboard || m.loggingIn || connect == nil {
+		t.Errorf("expected to move on and connect, got mode %v", m.mode)
+	}
+	if m.loginInputs[loginPassword].Value() != "" {
+		t.Error("the password must not be kept once it has been used")
+	}
+}
+
+func TestLogin_WrongPasswordStaysOnTheForm(t *testing.T) {
+	m := signedOut("http://test")
+	m.loggingIn = true
+	next, _ := m.Update(loginErrMsg{&api.StatusError{Code: 401, Message: "invalid username or password"}})
+	m = next.(Model)
+	if m.mode != modeLogin || m.loggingIn {
+		t.Fatalf("expected to be back on the form, got mode %v", m.mode)
+	}
+	// The server gives the same 401 for an account with no password, so the
+	// message has to say so or it reads as a typo.
+	if !strings.Contains(m.loginErr, "no password") {
+		t.Errorf("expected the no-password hint, got %q", m.loginErr)
+	}
+	if m.loginFocus != loginPassword {
+		t.Error("focus should return to the password to retry")
+	}
+
+	next, _ = m.Update(loginErrMsg{&api.StatusError{Code: 429, Message: "slow down"}})
+	if got := next.(Model).loginErr; !strings.Contains(got, "too many") {
+		t.Errorf("expected the rate limit explained, got %q", got)
+	}
+	next, _ = m.Update(loginErrMsg{errors.New("dial tcp: refused")})
+	if got := next.(Model).loginErr; !strings.Contains(got, "refused") {
+		t.Errorf("other errors should show as they are, got %q", got)
+	}
+}
+
+// A 401 anywhere means the session is gone. Every action would fail the same
+// way, so it goes back to the form instead, without keeping the old data.
+func TestUnauthorized_ReturnsToTheFormAndDropsTheData(t *testing.T) {
+	for name, msg := range map[string]tea.Msg{
+		"refresh":  fetchDataErrMsg{&api.StatusError{Code: 401}},
+		"action":   actionErrMsg{&api.StatusError{Code: 401}},
+		"schedule": scheduleActionErrMsg{&api.StatusError{Code: 401}},
+		"connect":  connectErrMsg{&api.StatusError{Code: 401}},
+	} {
+		t.Run(name, func(t *testing.T) {
+			m := sized()
+			m.incidents = []api.Incident{{ID: 1, Title: "secret incident"}}
+			m.teams = twoTeams()
+			m.isAdmin = true
+			m.loginInputs[loginUsername].SetValue("niklas")
+
+			next, cmd := m.Update(msg)
+			m = next.(Model)
+			if m.mode != modeLogin || m.connected {
+				t.Fatalf("expected the sign-in form, got mode %v connected=%v", m.mode, m.connected)
+			}
+			if len(m.incidents) != 0 || len(m.teams) != 0 || m.isAdmin {
+				t.Error("the previous session's data must not survive into the next sign-in")
+			}
+			if cmd == nil {
+				t.Error("the dead session should be forgotten on disk")
+			}
+			if !strings.Contains(m.loginNote, "session") {
+				t.Errorf("expected the reason, got %q", m.loginNote)
+			}
+			if m.loginInputs[loginUsername].Value() != "niklas" || m.loginFocus != loginPassword {
+				t.Error("the username should be kept so only the password is retyped")
+			}
+			if strings.Contains(m.View(), "secret incident") {
+				t.Error("nothing from the old session may still be on screen")
+			}
+		})
+	}
+}
+
+// A 403 is a permission, not a lost session: it must not sign anybody out.
+func TestForbidden_DoesNotSignOut(t *testing.T) {
+	m := sized()
+	next, _ := m.Update(actionErrMsg{&api.StatusError{Code: 403, Message: "administrator access required"}})
+	if got := next.(Model); got.mode == modeLogin || !got.connected {
+		t.Error("a 403 must leave the session alone")
+	}
+}
+
+func TestLogout(t *testing.T) {
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+	m := sized()
+	m.teams = twoTeams()
+	m.incidents = []api.Incident{{ID: 1}}
+	m, cmd := press(t, m, "L")
+	if cmd == nil {
+		t.Fatal("L should sign out")
+	}
+	next, _ := m.Update(logoutDoneMsg{})
+	m = next.(Model)
+	if m.mode != modeLogin || m.connected || len(m.incidents) != 0 {
+		t.Errorf("expected the form with nothing loaded, got mode %v", m.mode)
+	}
+	if !strings.Contains(m.loginNote, "signed out") {
+		t.Errorf("expected it to say so, got %q", m.loginNote)
+	}
+}
+
+// Signing out and in again must not leave two refresh timers running, each
+// re-arming itself for ever.
+func TestSigningInAgainStartsNoSecondTimer(t *testing.T) {
+	m := sized()
+	next, _ := m.Update(connectedMsg{})
+	m = next.(Model)
+	if !m.ticking {
+		t.Fatal("the first connect starts the refresh timer")
+	}
+	m = m.requireLogin("x")
+	if !m.ticking {
+		t.Fatal("the timer is still running while signed out")
+	}
+	// Ticks while signed out must do nothing rather than fetch.
+	if _, cmd := m.Update(tickMsg(time.Now())); cmd == nil {
+		t.Error("the timer keeps ticking")
+	}
+	if cmd := m.refreshActiveSection(); cmd != nil {
+		t.Error("no refresh should be attempted while signed out")
+	}
+}
+
+func TestLoginView_HidesThePasswordAndShowsTheNote(t *testing.T) {
+	m := signedOut("https://terdut.example.com").WithLogin("niklas", "api_key in config.yaml is no longer used")
+	if m.loginFocus != loginPassword {
+		t.Error("with the username known the cursor should start on the password")
+	}
+	m = typeInto(t, m, "hunter2-hunter2")
+	view := m.View()
+	for _, want := range []string{"Sign in to https://terdut.example.com", "niklas", "api_key in config.yaml is no longer used"} {
+		if !strings.Contains(view, want) {
+			t.Errorf("expected %q on the form:\n%s", want, view)
+		}
+	}
+	if strings.Contains(view, "hunter2") {
+		t.Error("the password must be masked")
+	}
+}

internal/tui/model.go

@@ -5,9 +5,12 @@ import (
 	"fmt"
 	"net/http"
 	"slices"
+	"strconv"
+	"strings"
 	"time"
 
 	"git.ryuvia.com/niklas/terdut-tui/internal/api"
+	"git.ryuvia.com/niklas/terdut-tui/internal/session"
 	"git.ryuvia.com/niklas/terdut-tui/internal/theme"
 	"github.com/charmbracelet/bubbles/help"
 	"github.com/charmbracelet/bubbles/key"
@@ -50,6 +53,14 @@ const (
 	modeAPIKeyReveal
 	modeAPIKeyRevokeByID
 	modePasswordSet
+	modeLogin
+)
+
+// Fields of the sign-in form, in tab order.
+const (
+	loginUsername = iota
+	loginPassword
+	loginFieldCount
 )
 
 // Fields of the set-password form, in tab order.
@@ -108,8 +119,14 @@ func filterLabel(filter string) string {
 // ── Messages ───────────────────────────────────────────────────────────────
 
 // dashboard
-type connectedMsg struct{}
+type connectedMsg struct {
+	teams []api.Team
+	me    api.Me
+}
 type connectErrMsg struct{ err error }
+type loginDoneMsg struct{}
+type loginErrMsg struct{ err error }
+type logoutDoneMsg struct{}
 type incidentsFetchedMsg struct{ incidents []api.Incident }
 type archivedIncidentsFetchedMsg struct{ incidents []api.Incident }
 type incidentActionDoneMsg struct {
@@ -143,7 +160,11 @@ type detailStatsErrMsg struct{ err error }
 // schedule
 type scheduleFetchedMsg struct {
 	entries []api.ScheduleEntry
-	current *api.ScheduleEntry
+	current []api.ScheduleEntry
+}
+type pickerReadyMsg struct {
+	users   []api.User
+	members map[int64]bool
 }
 type scheduleFetchErrMsg struct{ err error }
 type scheduleActionErrMsg struct{ err error }
@@ -179,12 +200,33 @@ type Model struct {
 	client          *api.Client
 	serverURL       string
 	refreshInterval time.Duration
+	theme           theme.Theme // kept to build a fresh model when signing out
 
 	activeSection section
 	mode          mode
 	width         int
 	height        int
 
+	// Teams. The server scopes everything to the caller's teams; activeTeamID
+	// narrows the incident and alert lists to one of them, 0 meaning all. The
+	// schedule is per team and always needs a concrete one, see scheduleTeam.
+	teams        []api.Team
+	activeTeamID int64
+	defaultTeam  string // config's `team`, resolved on connect
+	meID         int64
+	isAdmin      bool
+
+	// Sign-in. Until the server accepts a session the TUI is in modeLogin;
+	// loginNote is a line the form shows above the fields (why we are here), and
+	// ticking says the refresh timer is already running, so signing in again
+	// after signing out does not start a second one.
+	loginInputs [loginFieldCount]textinput.Model
+	loginFocus  int
+	loggingIn   bool
+	loginErr    string
+	loginNote   string
+	ticking     bool
+
 	// Connection & dashboard
 	connected     bool
 	loading       bool
@@ -242,7 +284,7 @@ type Model struct {
 	scheduleWindow  time.Time
 	scheduleEntries []api.ScheduleEntry
 	scheduleDays    []scheduleDay
-	currentOnCall   *api.ScheduleEntry
+	currentOnCall   []api.ScheduleEntry
 	scheduleLoading bool
 	scheduleTable   table.Model
 
@@ -252,6 +294,9 @@ type Model struct {
 	userPickerTable  table.Model
 	pickerTarget     pickerTarget
 	pickerAssignWeek bool
+	// pickerMembers is who belongs to the schedule's team, so the schedule picker
+	// offers only people the server will accept. Nil until fetched.
+	pickerMembers map[int64]bool
 
 	// User management section
 	userManageTable   table.Model
@@ -344,6 +389,18 @@ func NewModel(client *api.Client, serverURL string, refreshInterval time.Duratio
 		pwIn[i].CharLimit = 72 // bcrypt's limit; the server refuses longer
 	}
 
+	var loginIn [loginFieldCount]textinput.Model
+	for i, placeholder := range [loginFieldCount]string{"username", "password"} {
+		loginIn[i] = textinput.New()
+		loginIn[i].Placeholder = placeholder
+		loginIn[i].CharLimit = 72 // bcrypt's limit, and the server refuses longer passwords
+	}
+	loginIn[loginPassword].EchoMode = textinput.EchoPassword
+	loginIn[loginPassword].EchoCharacter = '•'
+	for i := range loginIn {
+		loginIn[i] = st.Input(loginIn[i])
+	}
+
 	for _, in := range []*textinput.Model{
 		&noteIn, &snoozeIn, &usernameIn, &emailIn, &topicIn, &keyNameIn, &revokeIn,
 	} {
@@ -364,12 +421,20 @@ func NewModel(client *api.Client, serverURL string, refreshInterval time.Duratio
 	}
 	window := today.AddDate(0, 0, -(weekday - 1))
 
+	startMode := modeDashboard
+	if client != nil && !client.HasSession() {
+		startMode = modeLogin
+		loginIn[loginUsername].Focus()
+	}
+
 	return Model{
 		client:            client,
 		serverURL:         serverURL,
 		refreshInterval:   refreshInterval,
+		theme:             th,
 		activeSection:     sectionIncidents,
-		mode:              modeDashboard,
+		mode:              startMode,
+		loginInputs:       loginIn,
 		loading:           true,
 		incidentFilter:    "",
 		alertFilter:       "firing",
@@ -395,7 +460,33 @@ func NewModel(client *api.Client, serverURL string, refreshInterval time.Duratio
 	}
 }
 
+// WithDefaultTeam names the team to start on, by name or id. It is resolved
+// against the caller's teams once connected; an unknown one is reported and the
+// TUI starts on all teams.
+func (m Model) WithDefaultTeam(team string) Model {
+	m.defaultTeam = strings.TrimSpace(team)
+	return m
+}
+
+// WithLogin prefills the sign-in form's username and sets a note shown above it.
+func (m Model) WithLogin(username, note string) Model {
+	m.loginInputs[loginUsername].SetValue(username)
+	m.loginNote = note
+	if username != "" && m.mode == modeLogin {
+		// The name is known, so the only thing left to type is the password.
+		m.loginInputs[loginUsername].Blur()
+		m.loginFocus = loginPassword
+		m.loginInputs[loginPassword].Focus()
+	}
+	return m
+}
+
+// Init tries the saved session, if there is one; otherwise the sign-in form is
+// already showing and there is nothing to do until it is submitted.
 func (m Model) Init() tea.Cmd {
+	if m.mode == modeLogin {
+		return nil
+	}
 	return connectCmd(m.client)
 }
 
@@ -444,21 +535,34 @@ func setRows(t *table.Model, rows []table.Row) {
 	}
 }
 
+// setTable replaces a table's columns and rows together, for tables whose column
+// count can change (the Team column comes and goes). bubbles re-renders the
+// existing rows as soon as SetColumns is called, and a row with a different
+// number of cells than the new columns indexes past the end and panics, so the
+// old rows have to go first. The cursor is put back afterwards, since a refresh
+// must not send it to the top.
+func setTable(t *table.Model, cols []table.Column, rows []table.Row) {
+	cursor := t.Cursor()
+	t.SetRows(nil)
+	t.SetColumns(cols)
+	setRows(t, rows)
+	if cursor > 0 && cursor < len(rows) {
+		t.SetCursor(cursor)
+	}
+}
+
 func (m *Model) rebuildIncidentTable() {
-	m.incidentTable.SetColumns(incidentColumns(m.width))
-	setRows(&m.incidentTable, incidentRows(m.incidents))
+	setTable(&m.incidentTable, incidentColumns(m.width, m.showTeamColumn()), incidentRows(m.incidents, m.showTeamColumn()))
 	m.incidentTable.SetHeight(tableHeight(m.height, 8))
 }
 
 func (m *Model) rebuildTable() {
-	m.alertTable.SetColumns(alertColumns(m.width))
-	setRows(&m.alertTable, alertRows(m.alerts))
+	setTable(&m.alertTable, alertColumns(m.width, m.showTeamColumn()), alertRows(m.alerts, m.showTeamColumn()))
 	m.alertTable.SetHeight(tableHeight(m.height, 8))
 }
 
 func (m *Model) rebuildArchivedTable() {
-	m.archivedTable.SetColumns(incidentColumns(m.width))
-	setRows(&m.archivedTable, incidentRows(m.archivedIncidents))
+	setTable(&m.archivedTable, incidentColumns(m.width, m.showTeamColumn()), incidentRows(m.archivedIncidents, m.showTeamColumn()))
 	m.archivedTable.SetHeight(tableHeight(m.height, 8))
 }
 
@@ -470,8 +574,9 @@ func (m *Model) rebuildScheduleTable() {
 
 func (m *Model) rebuildUserPickerTable() {
 	m.userPickerTable.SetColumns(userPickerColumns(m.width))
-	rows := make([]table.Row, len(m.users))
-	for i, u := range m.users {
+	pickable := m.pickerUsers()
+	rows := make([]table.Row, len(pickable))
+	for i, u := range pickable {
 		rows[i] = table.Row{u.Username, u.Email}
 	}
 	setRows(&m.userPickerTable, rows)
@@ -486,7 +591,7 @@ func (m *Model) rebuildUserManageTable() {
 		if topic == "" {
 			topic = "—"
 		}
-		rows[i] = table.Row{u.Username, u.Email, topic, u.CreatedAt.UTC().Format("2006-01-02")}
+		rows[i] = table.Row{u.Username, u.Email, topic, userFlags(u), u.CreatedAt.UTC().Format("2006-01-02")}
 	}
 	setRows(&m.userManageTable, rows)
 	m.userManageTable.SetHeight(tableHeight(m.height, 10))
@@ -536,6 +641,106 @@ func (m Model) detailViewportHeight() int {
 	return h
 }
 
+// showTeamColumn is whether list rows need saying which team they belong to:
+// only when they can come from more than one.
+func (m Model) showTeamColumn() bool {
+	return m.activeTeamID == 0 && len(m.teams) > 1
+}
+
+// activeTeam returns the team the lists are narrowed to.
+func (m Model) activeTeam() (api.Team, bool) {
+	return m.teamByID(m.activeTeamID)
+}
+
+func (m Model) teamByID(id int64) (api.Team, bool) {
+	for _, t := range m.teams {
+		if t.ID == id {
+			return t, true
+		}
+	}
+	return api.Team{}, false
+}
+
+// scheduleTeam is the team whose schedule the Schedule section shows. That is
+// the active team; with all teams showing it is the first one the caller owns,
+// else their first, because a rota belongs to one team and there is no
+// meaningful union to display.
+func (m Model) scheduleTeam() (api.Team, bool) {
+	if t, ok := m.activeTeam(); ok {
+		return t, true
+	}
+	for _, t := range m.teams {
+		if t.Role == api.RoleOwner {
+			return t, true
+		}
+	}
+	if len(m.teams) > 0 {
+		return m.teams[0], true
+	}
+	return api.Team{}, false
+}
+
+// canEditSchedule mirrors the server: writes need a team owner or an
+// administrator. Saying so up front beats a 403 after picking a user.
+func (m Model) canEditSchedule(t api.Team) bool {
+	return m.isAdmin || t.Role == api.RoleOwner
+}
+
+// canManageUser mirrors the server's self-or-admin rule for a user's password,
+// ntfy topic and API keys.
+func (m Model) canManageUser(u api.User) bool {
+	return m.isAdmin || u.ID == m.meID
+}
+
+// resolveTeam finds a team by id or, failing that, by name.
+func resolveTeam(teams []api.Team, want string) (api.Team, bool) {
+	if id, err := strconv.ParseInt(want, 10, 64); err == nil {
+		for _, t := range teams {
+			if t.ID == id {
+				return t, true
+			}
+		}
+	}
+	for _, t := range teams {
+		if strings.EqualFold(t.Name, want) {
+			return t, true
+		}
+	}
+	return api.Team{}, false
+}
+
+// pickerUsers is who the user picker offers. Disabled accounts are never worth
+// assigning to. For the schedule it is also limited to the team's members: the
+// server answers 404 for anyone else, and shows nothing until they are known.
+func (m Model) pickerUsers() []api.User {
+	out := make([]api.User, 0, len(m.users))
+	for _, u := range m.users {
+		if u.IsDisabled() {
+			continue
+		}
+		if m.pickerTarget == pickerSchedule && !m.pickerMembers[u.ID] {
+			continue
+		}
+		out = append(out, u)
+	}
+	return out
+}
+
+// userFlags is the Users table's marker column.
+func userFlags(u api.User) string {
+	var flags []string
+	if u.IsAdmin {
+		flags = append(flags, "admin")
+	}
+	if u.IsDisabled() {
+		flags = append(flags, "disabled")
+	}
+	if len(flags) == 0 {
+		return "—"
+	}
+	return strings.Join(flags, ",")
+}
+
 // noteEvents filters a timeline down to the deletable entries, which is what
 // the [ and ] cursor walks.
 func noteEvents(timeline []api.IncidentEvent) []api.IncidentEvent {
@@ -550,44 +755,67 @@ func noteEvents(timeline []api.IncidentEvent) []api.IncidentEvent {
 
 // ── Column definitions ─────────────────────────────────────────────────────
 
-func incidentColumns(width int) []table.Column {
+// teamW is the width of the Team column shown when rows can span teams.
+const teamW = 14
+
+func incidentColumns(width int, showTeam bool) []table.Column {
 	const sevW, statusW, timeW = 9, 15, 12
 	titleW := width/2 - 10
+	if showTeam {
+		titleW -= teamW + 2
+	}
 	if titleW < 20 {
 		titleW = 20
 	}
 	// 10 = bubbles' Padding(0, 1) on each of the five cells.
 	assigneeW := width - sevW - titleW - statusW - timeW - 10
+	if showTeam {
+		assigneeW -= teamW + 2
+	}
 	if assigneeW < 8 {
 		assigneeW = 8
 	}
-	return []table.Column{
+	cols := []table.Column{
 		{Title: "Sev", Width: sevW},
 		{Title: "Incident", Width: titleW},
-		{Title: "Status", Width: statusW},
-		{Title: "Assignee", Width: assigneeW},
-		{Title: "Triggered", Width: timeW},
 	}
+	if showTeam {
+		cols = append(cols, table.Column{Title: "Team", Width: teamW})
+	}
+	return append(cols,
+		table.Column{Title: "Status", Width: statusW},
+		table.Column{Title: "Assignee", Width: assigneeW},
+		table.Column{Title: "Triggered", Width: timeW},
+	)
 }
 
-func alertColumns(width int) []table.Column {
+func alertColumns(width int, showTeam bool) []table.Column {
 	const statusW, timeW = 10, 12
 	nameW := width/2 - 14
+	if showTeam {
+		nameW -= teamW + 2
+	}
 	if nameW < 20 {
 		nameW = 20
 	}
 	// 10 = bubbles' Padding(0, 1) on each of the five cells.
 	incW := width - nameW - statusW - 2*timeW - 10
+	if showTeam {
+		incW -= teamW + 2
+	}
 	if incW < 8 {
 		incW = 8
 	}
-	return []table.Column{
-		{Title: "Name", Width: nameW},
-		{Title: "Status", Width: statusW},
-		{Title: "Started", Width: timeW},
-		{Title: "Last Seen", Width: timeW},
-		{Title: "Incident", Width: incW},
+	cols := []table.Column{{Title: "Name", Width: nameW}}
+	if showTeam {
+		cols = append(cols, table.Column{Title: "Team", Width: teamW})
 	}
+	return append(cols,
+		table.Column{Title: "Status", Width: statusW},
+		table.Column{Title: "Started", Width: timeW},
+		table.Column{Title: "Last Seen", Width: timeW},
+		table.Column{Title: "Incident", Width: incW},
+	)
 }
 
 func scheduleColumns(width int) []table.Column {
@@ -618,8 +846,9 @@ func userManageColumns(width int) []table.Column {
 	createdW := 12
 	usernameW := 25
 	topicW := 22
-	// 8 = bubbles' Padding(0, 1) on each of the four cells.
-	emailW := width - usernameW - topicW - createdW - 8
+	flagsW := 14
+	// 10 = bubbles' Padding(0, 1) on each of the five cells.
+	emailW := width - usernameW - topicW - flagsW - createdW - 10
 	if emailW < 15 {
 		emailW = 15
 	}
@@ -627,13 +856,14 @@ func userManageColumns(width int) []table.Column {
 		{Title: "Username", Width: usernameW},
 		{Title: "Email", Width: emailW},
 		{Title: "Ntfy Topic", Width: topicW},
+		{Title: "Flags", Width: flagsW},
 		{Title: "Created", Width: createdW},
 	}
 }
 
 // ── Row builders ───────────────────────────────────────────────────────────
 
-func incidentRows(incidents []api.Incident) []table.Row {
+func incidentRows(incidents []api.Incident, showTeam bool) []table.Row {
 	now := time.Now()
 	rows := make([]table.Row, len(incidents))
 	for i, inc := range incidents {
@@ -651,12 +881,16 @@ func incidentRows(incidents []api.Incident) []table.Row {
 		if assignee == "" {
 			assignee = "—"
 		}
+		if showTeam {
+			rows[i] = table.Row{severity, inc.Title, teamLabel(inc.TeamName), status, assignee, humanAgo(now, inc.TriggeredAt)}
+			continue
+		}
 		rows[i] = table.Row{severity, inc.Title, status, assignee, humanAgo(now, inc.TriggeredAt)}
 	}
 	return rows
 }
 
-func alertRows(alerts []api.Alert) []table.Row {
+func alertRows(alerts []api.Alert, showTeam bool) []table.Row {
 	now := time.Now()
 	rows := make([]table.Row, len(alerts))
 	for i, a := range alerts {
@@ -664,11 +898,23 @@ func alertRows(alerts []api.Alert) []table.Row {
 		if a.IncidentID != nil {
 			incident = fmt.Sprintf("#%d", *a.IncidentID)
 		}
+		if showTeam {
+			rows[i] = table.Row{a.Name, teamLabel(a.TeamName), a.Status, humanAgo(now, a.StartsAt), humanAgo(now, a.ReceivedAt), incident}
+			continue
+		}
 		rows[i] = table.Row{a.Name, a.Status, humanAgo(now, a.StartsAt), humanAgo(now, a.ReceivedAt), incident}
 	}
 	return rows
 }
 
+// teamLabel is a team name for a table cell, with a dash when the server sent none.
+func teamLabel(name string) string {
+	if name == "" {
+		return "—"
+	}
+	return name
+}
+
 func scheduleRows(days []scheduleDay) []table.Row {
 	today := time.Now().UTC().Format("2006-01-02")
 	rows := make([]table.Row, len(days))
@@ -763,19 +1009,70 @@ func humanSeconds(secs *float64) string {
 
 // ── Commands ───────────────────────────────────────────────────────────────
 
+// errServerTooOld is what connecting to a server without teams looks like: the
+// server has no version endpoint, so its missing /api/teams is the tell.
+var errServerTooOld = errors.New("this server predates teams -- terdut-tui needs terdut-server v0.20 or later")
+
+// connectCmd checks the server is up, then loads the caller's teams and identity
+// with their key. /healthz is unauthenticated, so this is also the first thing
+// to notice a wrong key.
 func connectCmd(client *api.Client) tea.Cmd {
 	return func() tea.Msg {
 		if err := client.HealthCheck(); err != nil {
 			return connectErrMsg{err}
 		}
-		return connectedMsg{}
+		teams, err := client.ListTeams()
+		var se *api.StatusError
+		if errors.As(err, &se) && se.Code == http.StatusNotFound {
+			return connectErrMsg{errServerTooOld}
+		}
+		if err != nil {
+			return connectErrMsg{err}
+		}
+		me, err := client.Me()
+		if err != nil {
+			return connectErrMsg{err}
+		}
+		return connectedMsg{teams: teams, me: *me}
 	}
 }
 
-func fetchIncidentsCmd(client *api.Client, filter string) tea.Cmd {
+// loginCmd signs in and saves the session, so the next run can resume it. Failing
+// to save is not failing to sign in: the session works for this run either way.
+func loginCmd(client *api.Client, serverURL, username, password string) tea.Cmd {
+	return func() tea.Msg {
+		token, err := client.Login(username, password)
+		if err != nil {
+			return loginErrMsg{err}
+		}
+		_ = session.Save(serverURL, token)
+		return loginDoneMsg{}
+	}
+}
+
+// logoutCmd ends the session on the server and deletes the saved one. The saved
+// copy goes even when the server cannot be reached, because the person asked to
+// be signed out and a token left on disk would say otherwise.
+func logoutCmd(client *api.Client) tea.Cmd {
+	return func() tea.Msg {
+		_ = client.Logout()
+		_ = session.Clear()
+		return logoutDoneMsg{}
+	}
+}
+
+// forgetSessionCmd drops a saved session the server no longer honours.
+func forgetSessionCmd() tea.Cmd {
+	return func() tea.Msg {
+		_ = session.Clear()
+		return nil
+	}
+}
+
+func fetchIncidentsCmd(client *api.Client, teamID int64, filter string) tea.Cmd {
 	return func() tea.Msg {
 		status, snoozed := incidentQuery(filter)
-		incidents, err := client.ListIncidents(status, false, snoozed, 500)
+		incidents, err := client.ListIncidents(teamID, status, false, snoozed, 500)
 		if err != nil {
 			return fetchDataErrMsg{err}
 		}
@@ -783,11 +1080,11 @@ func fetchIncidentsCmd(client *api.Client, filter string) tea.Cmd {
 	}
 }
 
-func fetchArchivedIncidentsCmd(client *api.Client) tea.Cmd {
+func fetchArchivedIncidentsCmd(client *api.Client, teamID int64) tea.Cmd {
 	return func() tea.Msg {
 		// Archived incidents are all resolved, so the status filter has to be
 		// widened past the server's open-only default or nothing comes back.
-		incidents, err := client.ListIncidents(api.StatusResolved, true, false, 500)
+		incidents, err := client.ListIncidents(teamID, api.StatusResolved, true, false, 500)
 		if err != nil {
 			return fetchDataErrMsg{err}
 		}
@@ -795,13 +1092,13 @@ func fetchArchivedIncidentsCmd(client *api.Client) tea.Cmd {
 	}
 }
 
-func fetchAlertsCmd(client *api.Client, filter string) tea.Cmd {
+func fetchAlertsCmd(client *api.Client, teamID int64, filter string) tea.Cmd {
 	return func() tea.Msg {
 		status, archived := filter, false
 		if filter == "archived" {
 			status, archived = "", true
 		}
-		alerts, err := client.ListAlerts(status, archived, 500)
+		alerts, err := client.ListAlerts(teamID, status, archived, 500)
 		if err != nil {
 			return fetchDataErrMsg{err}
 		}
@@ -901,13 +1198,13 @@ func deleteNoteCmd(client *api.Client, id, eventID int64) tea.Cmd {
 
 // archiveIncidentCmd archives from the list view, so it reloads the list rather
 // than a detail pane.
-func archiveIncidentCmd(client *api.Client, id int64, filter string) tea.Cmd {
+func archiveIncidentCmd(client *api.Client, id, teamID int64, filter string) tea.Cmd {
 	return func() tea.Msg {
 		if _, err := client.ArchiveIncident(id); err != nil {
 			return actionErrMsg{err}
 		}
 		status, snoozed := incidentQuery(filter)
-		incidents, err := client.ListIncidents(status, false, snoozed, 500)
+		incidents, err := client.ListIncidents(teamID, status, false, snoozed, 500)
 		if err != nil {
 			return actionErrMsg{err}
 		}
@@ -915,12 +1212,12 @@ func archiveIncidentCmd(client *api.Client, id int64, filter string) tea.Cmd {
 	}
 }
 
-func unarchiveIncidentCmd(client *api.Client, id int64) tea.Cmd {
+func unarchiveIncidentCmd(client *api.Client, id, teamID int64) tea.Cmd {
 	return func() tea.Msg {
 		if err := client.UnarchiveIncident(id); err != nil {
 			return actionErrMsg{err}
 		}
-		incidents, err := client.ListIncidents(api.StatusResolved, true, false, 500)
+		incidents, err := client.ListIncidents(teamID, api.StatusResolved, true, false, 500)
 		if err != nil {
 			return actionErrMsg{err}
 		}
@@ -956,51 +1253,73 @@ func fetchDetailStatsCmd(client *api.Client) tea.Cmd {
 	}
 }
 
-func fetchScheduleCmd(client *api.Client, from, to time.Time) tea.Cmd {
+// loadSchedule reads one team's window and everyone's on-call today, the way
+// every schedule command ends so the view reflects what the server now holds.
+func loadSchedule(client *api.Client, teamID int64, from, to time.Time) (scheduleFetchedMsg, error) {
+	entries, err := client.GetSchedule(teamID, from.Format("2006-01-02"), to.Format("2006-01-02"))
+	if err != nil {
+		return scheduleFetchedMsg{}, err
+	}
+	current, err := client.GetCurrentOnCall()
+	if err != nil {
+		return scheduleFetchedMsg{}, err
+	}
+	return scheduleFetchedMsg{entries: entries, current: current}, nil
+}
+
+func fetchScheduleCmd(client *api.Client, teamID int64, from, to time.Time) tea.Cmd {
 	return func() tea.Msg {
-		entries, err := client.GetSchedule(from.Format("2006-01-02"), to.Format("2006-01-02"))
+		msg, err := loadSchedule(client, teamID, from, to)
 		if err != nil {
 			return scheduleFetchErrMsg{err}
 		}
-		current, err := client.GetCurrentOnCall()
-		if err != nil {
-			return scheduleFetchErrMsg{err}
-		}
-		return scheduleFetchedMsg{entries: entries, current: current}
+		return msg
 	}
 }
 
-func assignScheduleCmd(client *api.Client, userID int64, dates []string, replace bool, from, to time.Time) tea.Cmd {
+func assignScheduleCmd(client *api.Client, teamID, userID int64, dates []string, replace bool, from, to time.Time) tea.Cmd {
 	return func() tea.Msg {
-		if _, err := client.AssignSchedule(userID, dates, replace); err != nil {
+		if _, err := client.AssignSchedule(teamID, userID, dates, replace); err != nil {
 			return scheduleActionErrMsg{err}
 		}
-		entries, err := client.GetSchedule(from.Format("2006-01-02"), to.Format("2006-01-02"))
+		msg, err := loadSchedule(client, teamID, from, to)
 		if err != nil {
 			return scheduleActionErrMsg{err}
 		}
-		current, err := client.GetCurrentOnCall()
-		if err != nil {
-			return scheduleActionErrMsg{err}
-		}
-		return scheduleFetchedMsg{entries: entries, current: current}
+		return msg
 	}
 }
 
-func deleteScheduleEntryCmd(client *api.Client, entryID int64, from, to time.Time) tea.Cmd {
+func deleteScheduleEntryCmd(client *api.Client, teamID, entryID int64, from, to time.Time) tea.Cmd {
 	return func() tea.Msg {
-		if err := client.DeleteScheduleEntry(entryID); err != nil {
+		if err := client.DeleteScheduleEntry(teamID, entryID); err != nil {
 			return scheduleActionErrMsg{err}
 		}
-		entries, err := client.GetSchedule(from.Format("2006-01-02"), to.Format("2006-01-02"))
+		msg, err := loadSchedule(client, teamID, from, to)
 		if err != nil {
 			return scheduleActionErrMsg{err}
 		}
-		current, err := client.GetCurrentOnCall()
-		if err != nil {
-			return scheduleActionErrMsg{err}
+		return msg
 	}
-		return scheduleFetchedMsg{entries: entries, current: current}
+}
+
+// fetchPickerCmd loads what the schedule's user picker offers: everyone, and who
+// belongs to the team, since only members can be put on its rota.
+func fetchPickerCmd(client *api.Client, teamID int64) tea.Cmd {
+	return func() tea.Msg {
+		users, err := client.ListUsers()
+		if err != nil {
+			return userActionErrMsg{err}
+		}
+		members, err := client.ListTeamMembers(teamID)
+		if err != nil {
+			return userActionErrMsg{err}
+		}
+		ids := make(map[int64]bool, len(members))
+		for _, mem := range members {
+			ids[mem.UserID] = true
+		}
+		return pickerReadyMsg{users: users, members: ids}
 	}
 }
 

internal/tui/model_test.go

@@ -143,7 +143,7 @@ func TestIncidentRows(t *testing.T) {
 		{Title: "Unowned", Status: api.StatusTriggered, TriggeredAt: time.Now()},
 		{Title: "Quiet", Status: api.StatusTriggered, Severity: "info",
 			AssignedTo: "alice", SnoozedUntil: &future, TriggeredAt: time.Now()},
-	})
+	}, false)
 	if len(rows) != 3 {
 		t.Fatalf("expected 3 rows, got %d", len(rows))
 	}
@@ -159,12 +159,35 @@ func TestIncidentRows(t *testing.T) {
 	}
 }
 
+// Rows only carry a team cell when the columns have a Team header for it, or
+// every cell after it would sit under the wrong heading.
+func TestRows_TeamCellMatchesTeamColumn(t *testing.T) {
+	now := time.Now()
+	incRows := incidentRows([]api.Incident{{Title: "DiskFull", TeamName: "Ops", Status: api.StatusTriggered, TriggeredAt: now}}, true)
+	if got, want := len(incRows[0]), len(incidentColumns(120, true)); got != want {
+		t.Errorf("incident row has %d cells for %d columns", got, want)
+	}
+	if incRows[0][2] != "Ops" {
+		t.Errorf("expected the team after the title, got %v", incRows[0])
+	}
+	alRows := alertRows([]api.Alert{{Name: "DiskFull", StartsAt: now, ReceivedAt: now}}, true)
+	if got, want := len(alRows[0]), len(alertColumns(120, true)); got != want {
+		t.Errorf("alert row has %d cells for %d columns", got, want)
+	}
+	if alRows[0][1] != "—" {
+		t.Errorf("a missing team name should show an em dash, got %v", alRows[0])
+	}
+	if got, want := len(incidentRows([]api.Incident{{}}, false)[0]), len(incidentColumns(120, false)); got != want {
+		t.Errorf("incident row has %d cells for %d columns without teams", got, want)
+	}
+}
+
 func TestAlertRows_ShowIncidentLink(t *testing.T) {
 	id := int64(7)
 	rows := alertRows([]api.Alert{
 		{Name: "DiskFull", Status: "firing", IncidentID: &id},
 		{Name: "Orphan", Status: "resolved"},
-	})
+	}, false)
 	if rows[0][4] != "#7" {
 		t.Errorf("expected #7, got %q", rows[0][4])
 	}
@@ -204,31 +227,31 @@ func TestUserManageRows_ShowMissingTopic(t *testing.T) {
 // the window width.
 func TestColumnWidthsFitTheTerminal(t *testing.T) {
 	for _, width := range []int{100, 110, 140, 200} {
-		for name, cols := range map[string][]int{
-			"incident": widths(incidentColumns(width)),
-			"alert":    widths(alertColumns(width)),
+		// Five cells each, or six once a Team column is added. userManageColumns
+		// is five cells as well: username, email, topic, flags, created.
+		for name, tc := range map[string]struct {
+			cols  []table.Column
+			cells int
+		}{
+			"incident":           {incidentColumns(width, false), 5},
+			"incident with team": {incidentColumns(width, true), 6},
+			"alert":              {alertColumns(width, false), 5},
+			"alert with team":    {alertColumns(width, true), 6},
+			"user":               {userManageColumns(width), 5},
 		} {
 			sum := 0
-			for _, w := range cols {
+			for _, w := range widths(tc.cols) {
 				sum += w
 			}
-			const padding = 10 // bubbles applies Padding(0, 1) to each of five cells
+			padding := 2 * tc.cells // bubbles applies Padding(0, 1) to each cell
+			if len(tc.cols) != tc.cells {
+				t.Errorf("%s has %d columns, expected %d", name, len(tc.cols), tc.cells)
+			}
 			if sum+padding != width {
 				t.Errorf("%s columns at width %d sum to %d+%d = %d",
 					name, width, sum, padding, sum+padding)
 			}
 		}
-
-		// The users table is four cells, so its padding budget differs.
-		sum := 0
-		for _, w := range widths(userManageColumns(width)) {
-			sum += w
-		}
-		const userPadding = 8
-		if sum+userPadding != width {
-			t.Errorf("user columns at width %d sum to %d+%d = %d",
-				width, sum, userPadding, sum+userPadding)
-		}
 	}
 }
 
@@ -236,7 +259,7 @@ func TestColumnWidthsFitTheTerminal(t *testing.T) {
 // what must not happen is a negative or zero column.
 func TestColumnWidthsStayPositiveWhenNarrow(t *testing.T) {
 	for _, width := range []int{20, 40, 60} {
-		cols := append(widths(incidentColumns(width)), widths(alertColumns(width))...)
+		cols := append(widths(incidentColumns(width, true)), widths(alertColumns(width, true))...)
 		cols = append(cols, widths(userManageColumns(width))...)
 		for _, w := range cols {
 			if w < 1 {
@@ -287,6 +310,7 @@ func scheduledWeek(entries []api.ScheduleEntry) Model {
 	m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark)
 	m.width, m.height = 120, 40
 	m.connected = true
+	m.teams = []api.Team{{ID: 1, Name: "Ops", Role: api.RoleOwner}}
 	m.activeSection = sectionSchedule
 	m.scheduleWindow = time.Date(2026, 7, 27, 0, 0, 0, 0, time.UTC)
 	m.scheduleEntries = entries

internal/tui/update.go

@@ -1,7 +1,9 @@
 package tui
 
 import (
+	"errors"
 	"fmt"
+	"net/http"
 	"slices"
 	"strconv"
 	"strings"
@@ -13,6 +15,14 @@ import (
 )
 
 func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	// A 401 from anything means the server no longer honours the session: it
+	// expired, was ended from the web UI, or the account was disabled. Whatever
+	// was being done cannot succeed, so go back to the sign-in form and say why,
+	// rather than leaving every action to fail with "server returned 401".
+	if err := msgError(msg); api.IsUnauthorized(err) && m.mode != modeLogin {
+		return m.requireLogin("your session has ended — sign in again"), forgetSessionCmd()
+	}
+
 	switch msg := msg.(type) {
 	case tea.WindowSizeMsg:
 		m.width = msg.Width
@@ -33,13 +43,55 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	// ── Dashboard messages ────────────────────────────────────────────────
 
+	case loginDoneMsg:
+		m.loggingIn = false
+		m.loginErr = ""
+		m.loginNote = ""
+		m.loginInputs[loginPassword].Reset()
+		m.blurLoginForm()
+		m.mode = modeDashboard
+		m.err = nil
+		return m, connectCmd(m.client)
+
+	case loginErrMsg:
+		m.loggingIn = false
+		m.loginErr = loginErrorText(msg.err)
+		m.loginInputs[loginPassword].Reset()
+		m.focusLogin(loginPassword)
+		return m, nil
+
+	case logoutDoneMsg:
+		return m.requireLogin("you have signed out"), nil
+
 	case connectedMsg:
+		firstConnect := len(m.teams) == 0
 		m.connected = true
 		m.err = nil
+		m.teams = msg.teams
+		m.meID = msg.me.User.ID
+		m.isAdmin = msg.me.User.IsAdmin
+		var statusCmd tea.Cmd
+		if firstConnect && m.activeTeamID == 0 && m.defaultTeam != "" {
+			if t, ok := resolveTeam(m.teams, m.defaultTeam); ok {
+				m.activeTeamID = t.ID
+			} else {
+				m.statusMsg = fmt.Sprintf("team %q not found -- showing all teams", m.defaultTeam)
+				statusCmd = clearStatusCmd()
+			}
+		}
+		m.rebuildIncidentTable()
+		m.rebuildTable()
+		m.rebuildArchivedTable()
+		var tick tea.Cmd
+		if !m.ticking {
+			m.ticking = true
+			tick = tickCmd(m.refreshInterval)
+		}
 		return m, tea.Batch(
-			tickCmd(m.refreshInterval),
-			fetchIncidentsCmd(m.client, m.incidentFilter),
+			tick,
+			fetchIncidentsCmd(m.client, m.activeTeamID, m.incidentFilter),
 			fetchStatsCmd(m.client),
+			statusCmd,
 		)
 
 	case connectErrMsg:
@@ -159,6 +211,17 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.rebuildUserManageTable()
 		return m, nil
 
+	case pickerReadyMsg:
+		if m.mode != modeUserPicker {
+			return m, nil // the picker was closed before the lookup came back
+		}
+		m.users = msg.users
+		m.pickerMembers = msg.members
+		m.usersLoading = false
+		m.rebuildUserPickerTable()
+		m.rebuildUserManageTable()
+		return m, nil
+
 	case apiKeyCreatedMsg:
 		m.revealedAPIKey = msg.key
 		m.mode = modeAPIKeyReveal
@@ -226,22 +289,32 @@ func (m Model) refreshActiveSection() tea.Cmd {
 
 	switch m.activeSection {
 	case sectionIncidents:
-		return tea.Batch(fetchIncidentsCmd(m.client, m.incidentFilter), fetchStatsCmd(m.client))
+		return tea.Batch(fetchIncidentsCmd(m.client, m.activeTeamID, m.incidentFilter), fetchStatsCmd(m.client))
 	case sectionAlerts:
-		return tea.Batch(fetchAlertsCmd(m.client, m.alertFilter), fetchStatsCmd(m.client))
+		return tea.Batch(fetchAlertsCmd(m.client, m.activeTeamID, m.alertFilter), fetchStatsCmd(m.client))
 	case sectionStats:
 		// Both: fetchStatsCmd feeds the Incident Response block, the other the charts.
 		return tea.Batch(fetchStatsCmd(m.client), fetchDetailStatsCmd(m.client))
 	case sectionArchived:
-		return fetchArchivedIncidentsCmd(m.client)
+		return fetchArchivedIncidentsCmd(m.client, m.activeTeamID)
 	case sectionSchedule:
-		return fetchScheduleCmd(m.client, m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
+		return m.fetchScheduleWindowCmd()
 	case sectionUsers:
 		return fetchUsersCmd(m.client)
 	}
 	return nil
 }
 
+// fetchScheduleWindowCmd reloads the schedule window for the schedule's team, or
+// does nothing when the caller belongs to none.
+func (m Model) fetchScheduleWindowCmd() tea.Cmd {
+	team, ok := m.scheduleTeam()
+	if !ok {
+		return nil
+	}
+	return fetchScheduleCmd(m.client, team.ID, m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
+}
+
 // routeKey passes the key to the active component then to our handler.
 func (m Model) routeKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 	switch m.mode {
@@ -300,6 +373,14 @@ func (m Model) routeKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 	case modeAPIKeyMenu, modeAPIKeyReveal:
 		return m.handleKey(msg)
 
+	case modeLogin:
+		var inputCmd tea.Cmd
+		if !m.loggingIn {
+			m.loginInputs[m.loginFocus], inputCmd = m.loginInputs[m.loginFocus].Update(msg)
+		}
+		m2, ourCmd := m.handleKey(msg)
+		return m2, tea.Batch(inputCmd, ourCmd)
+
 	case modePasswordSet:
 		var inputCmd tea.Cmd
 		if !m.pwLoading {
@@ -369,6 +450,8 @@ func (m Model) handleKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		return m.handleAPIKeyMenuKey(msg)
 	case modePasswordSet:
 		return m.handlePasswordKey(msg)
+	case modeLogin:
+		return m.handleLoginKey(msg)
 	case modeAPIKeyCreate:
 		return m.handleAPIKeyCreateKey(msg)
 	case modeAPIKeyReveal:
@@ -410,14 +493,27 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		case sectionIncidents:
 			m.incidentFilter = nextFilter(incidentFilters, m.incidentFilter)
 			m.loading = true
-			return m, fetchIncidentsCmd(m.client, m.incidentFilter)
+			return m, fetchIncidentsCmd(m.client, m.activeTeamID, m.incidentFilter)
 		case sectionAlerts:
 			m.alertFilter = nextFilter(alertFilters, m.alertFilter)
 			m.loading = true
-			return m, fetchAlertsCmd(m.client, m.alertFilter)
+			return m, fetchAlertsCmd(m.client, m.activeTeamID, m.alertFilter)
 		}
 		return m, nil
 
+	case "L":
+		if !m.connected {
+			return m, nil
+		}
+		m.statusMsg = "Signing out…"
+		return m, logoutCmd(m.client)
+
+	case "T":
+		if !m.connected || len(m.teams) == 0 {
+			return m, nil
+		}
+		return m.switchTeam()
+
 	case "enter":
 		switch m.activeSection {
 		case sectionIncidents:
@@ -450,14 +546,14 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 				m.statusMsg = "resolve the incident before archiving it"
 				return m, clearStatusCmd()
 			}
-			return m, archiveIncidentCmd(m.client, inc.ID, m.incidentFilter)
+			return m, archiveIncidentCmd(m.client, inc.ID, m.activeTeamID, m.incidentFilter)
 		case sectionArchived:
 			i := m.archivedTable.Cursor()
 			if i < 0 || i >= len(m.archivedIncidents) {
 				return m, nil
 			}
 			m.archivedLoading = true
-			return m, unarchiveIncidentCmd(m.client, m.archivedIncidents[i].ID)
+			return m, unarchiveIncidentCmd(m.client, m.archivedIncidents[i].ID, m.activeTeamID)
 		}
 		return m, nil
 
@@ -465,16 +561,18 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 	case "left", "h":
 		if m.activeSection == sectionSchedule {
 			m.scheduleWindow = m.scheduleWindow.AddDate(0, 0, -7)
-			m.scheduleLoading = true
-			return m, fetchScheduleCmd(m.client, m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
+			cmd := m.fetchScheduleWindowCmd()
+			m.scheduleLoading = cmd != nil
+			return m, cmd
 		}
 		return m, nil
 
 	case "right", "l":
 		if m.activeSection == sectionSchedule {
 			m.scheduleWindow = m.scheduleWindow.AddDate(0, 0, 7)
-			m.scheduleLoading = true
-			return m, fetchScheduleCmd(m.client, m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
+			cmd := m.fetchScheduleWindowCmd()
+			m.scheduleLoading = cmd != nil
+			return m, cmd
 		}
 		return m, nil
 
@@ -482,6 +580,9 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		if m.activeSection != sectionSchedule || !m.connected {
 			return m, nil
 		}
+		if !m.checkScheduleEditable() {
+			return m, clearStatusCmd()
+		}
 		m.pickerAssignWeek = false
 		return m.openUserPicker(pickerSchedule)
 
@@ -489,6 +590,9 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		if m.activeSection != sectionSchedule || !m.connected {
 			return m, nil
 		}
+		if !m.checkScheduleEditable() {
+			return m, clearStatusCmd()
+		}
 		m.pickerAssignWeek = true
 		return m.openUserPicker(pickerSchedule)
 
@@ -518,6 +622,10 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 			if cursor < 0 || cursor >= len(m.users) {
 				return m, nil
 			}
+			if !m.isAdmin {
+				m.statusMsg = "only administrators can delete users"
+				return m, clearStatusCmd()
+			}
 			m.selectedUser = m.users[cursor]
 			m.confirmTarget = confirmDeleteUser
 			m.mode = modeConfirm
@@ -528,6 +636,10 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		if m.activeSection != sectionUsers || !m.connected {
 			return m, nil
 		}
+		if !m.isAdmin {
+			m.statusMsg = "only administrators can create users"
+			return m, clearStatusCmd()
+		}
 		m.userFormInputs[0].Reset()
 		m.userFormInputs[1].Reset()
 		m.userFormFocus = 0
@@ -545,6 +657,10 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 			return m, nil
 		}
 		m.selectedUser = m.users[cursor]
+		if !m.canManageUser(m.selectedUser) {
+			cmd := m.refuseUserAction("notification topic")
+			return m, cmd
+		}
 		// Prefilled with what they have, so editing a topic does not mean
 		// retyping it, and clearing one is a deliberate wipe.
 		m.ntfyTopicInput.SetValue(m.selectedUser.Topic())
@@ -562,6 +678,10 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 			return m, nil
 		}
 		m.selectedUser = m.users[cursor]
+		if !m.canManageUser(m.selectedUser) {
+			cmd := m.refuseUserAction("API keys")
+			return m, cmd
+		}
 		m.mode = modeAPIKeyMenu
 		return m, nil
 
@@ -574,6 +694,10 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 			return m, nil
 		}
 		m.selectedUser = m.users[cursor]
+		if !m.canManageUser(m.selectedUser) {
+			cmd := m.refuseUserAction("password")
+			return m, cmd
+		}
 		for i := range m.pwInputs {
 			m.pwInputs[i].Reset()
 			m.pwInputs[i].Blur()
@@ -589,13 +713,20 @@ func (m Model) handleDashboardKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 	return m, nil
 }
 
+// refuseUserAction explains a self-or-admin action declined up front, and is what
+// the status bar clears afterwards. The server refuses these with a 403 anyway.
+func (m *Model) refuseUserAction(what string) tea.Cmd {
+	m.statusMsg = "only administrators can change another user's " + what
+	return clearStatusCmd()
+}
+
 // loadSectionIfEmpty fetches a section's data the first time it is opened.
 func (m *Model) loadSectionIfEmpty() tea.Cmd {
 	switch m.activeSection {
 	case sectionAlerts:
 		if len(m.alerts) == 0 {
 			m.loading = true
-			return fetchAlertsCmd(m.client, m.alertFilter)
+			return fetchAlertsCmd(m.client, m.activeTeamID, m.alertFilter)
 		}
 	case sectionStats:
 		if !m.statsLoaded {
@@ -605,12 +736,13 @@ func (m *Model) loadSectionIfEmpty() tea.Cmd {
 	case sectionArchived:
 		if len(m.archivedIncidents) == 0 {
 			m.archivedLoading = true
-			return fetchArchivedIncidentsCmd(m.client)
+			return fetchArchivedIncidentsCmd(m.client, m.activeTeamID)
 		}
 	case sectionSchedule:
 		if len(m.scheduleDays) == 0 {
-			m.scheduleLoading = true
-			return fetchScheduleCmd(m.client, m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
+			cmd := m.fetchScheduleWindowCmd()
+			m.scheduleLoading = cmd != nil
+			return cmd
 		}
 	case sectionUsers:
 		if len(m.users) == 0 {
@@ -641,6 +773,18 @@ func (m Model) openIncident(inc api.Incident) (Model, tea.Cmd) {
 func (m Model) openUserPicker(target pickerTarget) (Model, tea.Cmd) {
 	m.pickerTarget = target
 	m.mode = modeUserPicker
+	if target == pickerSchedule {
+		// Only the team's own members can go on its rota, so who they are has to
+		// be known before anybody is offered.
+		team, ok := m.scheduleTeam()
+		if !ok {
+			m.mode = modeDashboard
+			return m, nil
+		}
+		m.pickerMembers = nil
+		m.usersLoading = true
+		return m, fetchPickerCmd(m.client, team.ID)
+	}
 	if len(m.users) == 0 {
 		m.usersLoading = true
 		return m, fetchUsersCmd(m.client)
@@ -649,6 +793,63 @@ func (m Model) openUserPicker(target pickerTarget) (Model, tea.Cmd) {
 	return m, nil
 }
 
+// switchTeam steps the active team through all teams, then each of the caller's
+// teams in turn, and reloads what depends on it. Sections that are not on screen
+// are emptied rather than fetched, so they load when next opened; the incident
+// queue is the exception because it is what the caller returns to.
+func (m Model) switchTeam() (Model, tea.Cmd) {
+	next := int64(0)
+	if m.activeTeamID == 0 {
+		next = m.teams[0].ID
+	} else {
+		for i, t := range m.teams {
+			if t.ID == m.activeTeamID && i+1 < len(m.teams) {
+				next = m.teams[i+1].ID
+			}
+		}
+	}
+	m.activeTeamID = next
+
+	m.incidents, m.alerts, m.archivedIncidents = nil, nil, nil
+	m.scheduleEntries, m.scheduleDays, m.currentOnCall = nil, nil, nil
+	m.loading = true
+	m.rebuildIncidentTable()
+	m.rebuildTable()
+	m.rebuildArchivedTable()
+	m.rebuildScheduleTable()
+
+	label := "all teams"
+	if t, ok := m.activeTeam(); ok {
+		label = t.Name
+	}
+	m.statusMsg = "Team: " + label
+
+	cmds := []tea.Cmd{clearStatusCmd()}
+	if m.activeSection != sectionIncidents {
+		cmds = append(cmds, fetchIncidentsCmd(m.client, m.activeTeamID, m.incidentFilter))
+	}
+	cmds = append(cmds, m.refreshActiveSection())
+	if m.activeSection == sectionSchedule {
+		m.scheduleLoading = true
+	}
+	return m, tea.Batch(cmds...)
+}
+
+// checkScheduleEditable says why a schedule change is refused, in the status
+// bar, and reports whether it may go ahead. The server enforces the same rule.
+func (m *Model) checkScheduleEditable() bool {
+	team, ok := m.scheduleTeam()
+	switch {
+	case !ok:
+		m.statusMsg = "you are not in any team"
+	case !m.canEditSchedule(team):
+		m.statusMsg = "only owners of " + team.Name + " can change its schedule"
+	default:
+		return true
+	}
+	return false
+}
+
 // nextFilter advances a filter cycle, wrapping at the end.
 func nextFilter(cycle []string, current string) string {
 	for i, f := range cycle {
@@ -732,10 +933,10 @@ func (m Model) handleIncidentDetailKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		if inc.ArchivedAt != nil {
 			m.archivedLoading = true
 			m.mode = modeDashboard
-			return m, unarchiveIncidentCmd(m.client, inc.ID)
+			return m, unarchiveIncidentCmd(m.client, inc.ID, m.activeTeamID)
 		}
 		m.mode = modeDashboard
-		return m, archiveIncidentCmd(m.client, inc.ID, m.incidentFilter)
+		return m, archiveIncidentCmd(m.client, inc.ID, m.activeTeamID, m.incidentFilter)
 
 	case "c":
 		m.mode = modeNote
@@ -895,7 +1096,8 @@ func (m Model) handleConfirmKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		m.mode = modeDashboard
 		m.pendingDeleteEntry = nil
 		m.scheduleLoading = true
-		return m, deleteScheduleEntryCmd(m.client, entry.ID,
+		team, _ := m.scheduleTeam()
+		return m, deleteScheduleEntryCmd(m.client, team.ID, entry.ID,
 			m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
 
 	case confirmDeleteUser:
@@ -912,7 +1114,8 @@ func (m Model) handleConfirmKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 			return m, nil
 		}
 		m.scheduleLoading = true
-		return m, assignScheduleCmd(m.client, p.userID, p.dates, true,
+		team, _ := m.scheduleTeam()
+		return m, assignScheduleCmd(m.client, team.ID, p.userID, p.dates, true,
 			m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
 	}
 
@@ -933,10 +1136,11 @@ func (m Model) handleUserPickerKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 
 	case "enter":
 		cursor := m.userPickerTable.Cursor()
-		if cursor < 0 || cursor >= len(m.users) {
+		pickable := m.pickerUsers()
+		if cursor < 0 || cursor >= len(pickable) {
 			return m, nil
 		}
-		user := m.users[cursor]
+		user := pickable[cursor]
 
 		if m.pickerTarget == pickerIncidentAssignee {
 			m.mode = modeIncidentDetail
@@ -986,7 +1190,8 @@ func (m Model) handleUserPickerKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 		// Nobody else loses anything, but the server rejects any date that
 		// already exists — including days this same person already holds, which
 		// is a no-op worth letting through silently.
-		return m, assignScheduleCmd(m.client, user.ID, dates, m.scheduleOccupied(dates),
+		team, _ := m.scheduleTeam()
+		return m, assignScheduleCmd(m.client, team.ID, user.ID, dates, m.scheduleOccupied(dates),
 			m.scheduleWindow, m.scheduleWindow.AddDate(0, 0, 6))
 	}
 
@@ -1244,3 +1449,119 @@ func (m Model) handlePasswordKey(msg tea.KeyMsg) (Model, tea.Cmd) {
 	}
 	return m, nil
 }
+
+// ── Sign in ───────────────────────────────────────────────────────────────────
+
+// msgError digs the error out of the messages that carry one, so the 401 check
+// in Update covers them all in one place.
+func msgError(msg tea.Msg) error {
+	switch msg := msg.(type) {
+	case connectErrMsg:
+		return msg.err
+	case fetchDataErrMsg:
+		return msg.err
+	case detailErrMsg:
+		return msg.err
+	case actionErrMsg:
+		return msg.err
+	case detailStatsErrMsg:
+		return msg.err
+	case scheduleFetchErrMsg:
+		return msg.err
+	case scheduleActionErrMsg:
+		return msg.err
+	case userActionErrMsg:
+		return msg.err
+	}
+	return nil
+}
+
+// requireLogin returns to the sign-in form with everything the previous session
+// loaded dropped, so a different account never sees the last one's incidents.
+func (m Model) requireLogin(note string) Model {
+	name := m.loginInputs[loginUsername].Value()
+	fresh := NewModel(m.client, m.serverURL, m.refreshInterval, m.theme)
+	fresh.width, fresh.height = m.width, m.height
+	fresh.defaultTeam = m.defaultTeam
+	fresh.ticking = m.ticking
+	fresh.mode = modeLogin
+	fresh.loginInputs[loginUsername].SetValue(name)
+	fresh.loginNote = note
+	fresh.focusLogin(loginUsername)
+	if name != "" {
+		fresh.focusLogin(loginPassword)
+	}
+	fresh.rebuildIncidentTable()
+	fresh.rebuildTable()
+	fresh.rebuildArchivedTable()
+	fresh.rebuildScheduleTable()
+	fresh.rebuildUserPickerTable()
+	fresh.rebuildUserManageTable()
+	return fresh
+}
+
+func (m *Model) blurLoginForm() {
+	for i := range m.loginInputs {
+		m.loginInputs[i].Blur()
+	}
+}
+
+func (m *Model) focusLogin(field int) {
+	m.blurLoginForm()
+	m.loginFocus = field
+	m.loginInputs[field].Focus()
+}
+
+// loginErrorText turns a failed sign-in into something to act on. The server
+// answers a wrong password, an unknown user and an account with no password with
+// the same 401, so the last one has to be named here or it reads as a typo.
+func loginErrorText(err error) string {
+	var se *api.StatusError
+	if errors.As(err, &se) {
+		switch se.Code {
+		case http.StatusUnauthorized:
+			return "invalid username or password — an account with no password cannot sign in; set one in the web UI first"
+		case http.StatusTooManyRequests:
+			return "too many attempts — wait a few minutes and try again"
+		}
+	}
+	return err.Error()
+}
+
+func (m Model) handleLoginKey(msg tea.KeyMsg) (Model, tea.Cmd) {
+	switch msg.String() {
+	case "ctrl+c", "esc":
+		return m, tea.Quit
+	}
+	if m.loggingIn {
+		return m, nil
+	}
+
+	switch msg.String() {
+	case "tab", "shift+tab", "down", "up":
+		next := loginPassword
+		if m.loginFocus == loginPassword {
+			next = loginUsername
+		}
+		m.focusLogin(next)
+		return m, nil
+
+	case "enter":
+		username := strings.TrimSpace(m.loginInputs[loginUsername].Value())
+		password := m.loginInputs[loginPassword].Value()
+		switch {
+		case username == "":
+			m.loginErr = "enter your username"
+			m.focusLogin(loginUsername)
+			return m, nil
+		case password == "":
+			m.loginErr = "enter your password"
+			m.focusLogin(loginPassword)
+			return m, nil
+		}
+		m.loggingIn = true
+		m.loginErr = ""
+		return m, loginCmd(m.client, m.serverURL, username, password)
+	}
+	return m, nil
+}

internal/tui/update_test.go

@@ -35,6 +35,7 @@ func sized() Model {
 	m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark)
 	m.width, m.height = 120, 40
 	m.connected = true
+	m.isAdmin = true // most handlers are being tested for what they do, not who may
 	return m
 }
 
@@ -320,6 +321,8 @@ func pickingOnCall(entries []api.ScheduleEntry, dayIndex int, week bool) Model {
 		{ID: 1, Username: "niklas", Email: "n@example.com"},
 		{ID: 2, Username: "alex", Email: "a@example.com"},
 	}
+	m.pickerTarget = pickerSchedule
+	m.pickerMembers = map[int64]bool{1: true, 2: true}
 	m.rebuildUserPickerTable()
 	m.scheduleTable.SetCursor(dayIndex)
 	m.pickerAssignWeek = week
@@ -693,6 +696,8 @@ func containsAll(s string, subs ...string) bool {
 func TestSchedule_AssignWeekAfterStartupSizingDoesNotPanic(t *testing.T) {
 	m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark)
 	m.connected = true
+	m.isAdmin = true
+	m.teams = []api.Team{{ID: 1, Name: "Ops", Role: api.RoleOwner}}
 	m.activeSection = sectionSchedule
 	m.scheduleWindow = time.Date(2026, 7, 27, 0, 0, 0, 0, time.UTC)
 
@@ -718,9 +723,253 @@ func TestSchedule_AssignWeekAfterStartupSizingDoesNotPanic(t *testing.T) {
 	if m.mode != modeUserPicker {
 		t.Fatalf("W did not open the user picker, got mode %v", m.mode)
 	}
+	// The picker waits for the team's members before offering anybody.
+	next, _ = m.Update(pickerReadyMsg{
+		users:   []api.User{{ID: 1, Username: "niklas", Email: "n@example.com"}},
+		members: map[int64]bool{1: true},
+	})
+	m = next.(Model)
 	m, _ = press(t, m, "enter") // panicked here
 
 	if m.mode == modeUserPicker {
 		t.Fatal("enter left the picker open; the assignment never went anywhere")
 	}
 }
+
+// ── Teams ─────────────────────────────────────────────────────────────────
+
+func twoTeams() []api.Team {
+	return []api.Team{
+		{ID: 1, Name: "Ops", Role: api.RoleOwner},
+		{ID: 2, Name: "Dev", Role: api.RoleMember},
+	}
+}
+
+func TestConnected_LoadsTeamsAndWhoIAm(t *testing.T) {
+	m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark)
+	m.width, m.height = 120, 40
+	next, _ := m.Update(connectedMsg{
+		teams: twoTeams(),
+		me:    api.Me{User: api.User{ID: 7, IsAdmin: true}},
+	})
+	m = next.(Model)
+	if len(m.teams) != 2 || m.meID != 7 || !m.isAdmin {
+		t.Errorf("expected teams, id and admin flag to be kept, got %+v %d %v", m.teams, m.meID, m.isAdmin)
+	}
+	if m.activeTeamID != 0 {
+		t.Errorf("with no default team every team shows, got active %d", m.activeTeamID)
+	}
+}
+
+func TestConnected_DefaultTeamFromConfig(t *testing.T) {
+	for _, want := range []string{"dev", "2"} { // by name, any case, or by id
+		m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark).WithDefaultTeam(want)
+		next, _ := m.Update(connectedMsg{teams: twoTeams()})
+		if got := next.(Model).activeTeamID; got != 2 {
+			t.Errorf("default team %q: expected team 2, got %d", want, got)
+		}
+	}
+
+	m := NewModel(nil, "http://test", time.Minute, theme.GruvboxDark).WithDefaultTeam("nope")
+	next, cmd := m.Update(connectedMsg{teams: twoTeams()})
+	m = next.(Model)
+	if m.activeTeamID != 0 || !strings.Contains(m.statusMsg, "nope") {
+		t.Errorf("an unknown default should fall back to all teams and say so, got %d %q",
+			m.activeTeamID, m.statusMsg)
+	}
+	if cmd == nil {
+		t.Error("expected the initial fetches to still be issued")
+	}
+}
+
+func TestSwitchTeam_CyclesAllThenEachTeam(t *testing.T) {
+	m := sized()
+	m.teams = twoTeams()
+	var seen []int64
+	for i := 0; i < 4; i++ {
+		var cmd tea.Cmd
+		m, cmd = press(t, m, "T")
+		if cmd == nil {
+			t.Fatal("switching team should reload")
+		}
+		seen = append(seen, m.activeTeamID)
+	}
+	want := []int64{1, 2, 0, 1}
+	for i := range want {
+		if seen[i] != want[i] {
+			t.Fatalf("expected the cycle %v, got %v", want, seen)
+		}
+	}
+}
+
+func TestSwitchTeam_ClearsRowsFromTheOtherTeam(t *testing.T) {
+	m := sized()
+	m.teams = twoTeams()
+	m.incidents = []api.Incident{{ID: 1, Title: "old", TeamName: "Ops"}}
+	m.rebuildIncidentTable()
+	m, _ = press(t, m, "T")
+	if len(m.incidents) != 0 {
+		t.Errorf("the previous team's incidents must not linger, got %d", len(m.incidents))
+	}
+	if !strings.Contains(m.statusMsg, "Ops") {
+		t.Errorf("expected the status bar to name the team, got %q", m.statusMsg)
+	}
+}
+
+func TestSwitchTeam_NoTeamsDoesNothing(t *testing.T) {
+	m, cmd := press(t, sized(), "T")
+	if cmd != nil || m.activeTeamID != 0 {
+		t.Errorf("without teams T has nothing to switch to")
+	}
+}
+
+func TestScheduleTeam(t *testing.T) {
+	m := sized()
+	if _, ok := m.scheduleTeam(); ok {
+		t.Error("no teams means no schedule")
+	}
+	m.teams = []api.Team{{ID: 2, Name: "Dev", Role: api.RoleMember}, {ID: 1, Name: "Ops", Role: api.RoleOwner}}
+	if tm, _ := m.scheduleTeam(); tm.ID != 1 {
+		t.Errorf("with all teams showing the one the caller owns is used, got %d", tm.ID)
+	}
+	m.activeTeamID = 2
+	if tm, _ := m.scheduleTeam(); tm.ID != 2 {
+		t.Errorf("the active team wins, got %d", tm.ID)
+	}
+}
+
+func TestSchedule_OnlyOwnersAndAdminsEdit(t *testing.T) {
+	m := scheduledWeek(nil)
+	m.isAdmin = false
+	m.teams = []api.Team{{ID: 1, Name: "Ops", Role: api.RoleMember}}
+	m, cmd := press(t, m, "+")
+	if m.mode == modeUserPicker {
+		t.Fatal("a plain member must not get as far as the picker")
+	}
+	if !strings.Contains(m.statusMsg, "owners of Ops") {
+		t.Errorf("expected the reason in the status bar, got %q", m.statusMsg)
+	}
+	if cmd == nil {
+		t.Error("the message should clear itself")
+	}
+
+	m.isAdmin = true // administrators may edit any team's rota
+	m.statusMsg = ""
+	m, _ = press(t, m, "+")
+	if m.mode != modeUserPicker {
+		t.Errorf("an administrator should reach the picker, got mode %v", m.mode)
+	}
+}
+
+// The picker fetches the team's members, and offers nobody until they arrive:
+// the server answers 404 for anyone else.
+func TestSchedulePicker_OffersOnlyTeamMembers(t *testing.T) {
+	m := scheduledWeek(nil)
+	m, cmd := press(t, m, "+")
+	if cmd == nil || !m.usersLoading {
+		t.Fatal("opening the picker should start loading the members")
+	}
+	if got := len(m.pickerUsers()); got != 0 {
+		t.Errorf("nobody should be offered before the members are known, got %d", got)
+	}
+
+	disabled := time.Now()
+	next, _ := m.Update(pickerReadyMsg{
+		users: []api.User{
+			{ID: 1, Username: "niklas"},
+			{ID: 2, Username: "outsider"},
+			{ID: 3, Username: "gone", DisabledAt: &disabled},
+		},
+		members: map[int64]bool{1: true, 3: true},
+	})
+	m = next.(Model)
+	got := m.pickerUsers()
+	if len(got) != 1 || got[0].Username != "niklas" {
+		t.Errorf("expected only the enabled member, got %+v", got)
+	}
+	if rows := m.userPickerTable.Rows(); len(rows) != 1 {
+		t.Errorf("the table should match, got %d rows", len(rows))
+	}
+}
+
+func TestUsers_NonAdminsCannotCreateOrDelete(t *testing.T) {
+	m := threeUsers()
+	m.isAdmin = false
+	m.meID = 1
+	m, _ = press(t, m, "n")
+	if m.mode != modeDashboard || !strings.Contains(m.statusMsg, "administrators") {
+		t.Errorf("n should be refused with a reason, got mode %v %q", m.mode, m.statusMsg)
+	}
+	m, _ = press(t, m, "d")
+	if m.mode != modeDashboard {
+		t.Errorf("d should not ask to delete for a non-admin, got mode %v", m.mode)
+	}
+}
+
+func TestUsers_NonAdminManagesOnlyThemselves(t *testing.T) {
+	m := threeUsers() // cursor on erik, id 3
+	m.isAdmin = false
+	m.meID = 1
+	for _, key := range []string{"t", "k", "p"} {
+		next, _ := press(t, m, key)
+		if next.mode != modeDashboard {
+			t.Errorf("%s on somebody else's row should be refused, got mode %v", key, next.mode)
+		}
+		if !strings.Contains(next.statusMsg, "another user's") {
+			t.Errorf("%s: expected the reason, got %q", key, next.statusMsg)
+		}
+	}
+
+	m.userManageTable.SetCursor(0) // niklas, id 1: themselves
+	if next, _ := press(t, m, "k"); next.mode != modeAPIKeyMenu {
+		t.Errorf("a user may manage their own keys, got mode %v", next.mode)
+	}
+}
+
+func TestUserFlags(t *testing.T) {
+	now := time.Now()
+	cases := []struct {
+		u    api.User
+		want string
+	}{
+		{api.User{}, "—"},
+		{api.User{IsAdmin: true}, "admin"},
+		{api.User{DisabledAt: &now}, "disabled"},
+		{api.User{IsAdmin: true, DisabledAt: &now}, "admin,disabled"},
+	}
+	for _, c := range cases {
+		if got := userFlags(c.u); got != c.want {
+			t.Errorf("userFlags(%+v) = %q, want %q", c.u, got, c.want)
+		}
+	}
+}
+
+// Rebuilding a list on every refresh must not send the cursor back to the top.
+func TestRefresh_KeepsTheCursor(t *testing.T) {
+	m := sized()
+	m.incidents = []api.Incident{{ID: 1}, {ID: 2}, {ID: 3}}
+	m.rebuildIncidentTable()
+	m.incidentTable.SetCursor(2)
+	next, _ := m.Update(incidentsFetchedMsg{incidents: m.incidents})
+	if got := next.(Model).incidentTable.Cursor(); got != 2 {
+		t.Errorf("expected the cursor to stay on row 2, got %d", got)
+	}
+}
+
+// The Team column comes and goes as the team switches, and the table must
+// survive its column count changing under rows that are already loaded.
+func TestTeamColumn_AppearsWithoutPanicking(t *testing.T) {
+	m := sized()
+	m.incidents = []api.Incident{{ID: 1, Title: "a", TeamName: "Ops"}}
+	m.rebuildIncidentTable()
+	m.teams = twoTeams()
+	m.rebuildIncidentTable() // five columns become six over a five-cell row
+	if got := len(m.incidentTable.Columns()); got != 6 {
+		t.Errorf("expected a Team column across two teams, got %d columns", got)
+	}
+	m.activeTeamID = 1
+	m.rebuildIncidentTable()
+	if got := len(m.incidentTable.Columns()); got != 5 {
+		t.Errorf("expected the Team column to go when one team is chosen, got %d", got)
+	}
+}

internal/tui/view.go

@@ -27,10 +27,40 @@ func (m Model) View() string {
 
 func (m Model) renderHeader() string {
 	title := m.styles.Header.Render("terdut-tui")
+	if len(m.teams) > 0 {
+		title += m.styles.Muted.Render("  team: " + m.activeTeamLabel())
+	}
 	right := m.styles.Muted.Render(m.serverURL)
 	return spread(title, right, m.width)
 }
 
+// renderLogin is the sign-in form. It is the whole body: nothing else is shown
+// until the server has accepted a session.
+func (m Model) renderLogin() string {
+	var b strings.Builder
+	b.WriteString("\n  " + m.styles.Bold.Render("Sign in to "+m.serverURL) + "\n\n")
+	if m.loginNote != "" {
+		b.WriteString(m.styles.Status.Render("  "+m.loginNote) + "\n\n")
+	}
+	b.WriteString("  " + m.styles.Header.Render("Username: ") + m.loginInputs[loginUsername].View() + "\n")
+	b.WriteString("  " + m.styles.Header.Render("Password: ") + m.loginInputs[loginPassword].View() + "\n\n")
+	switch {
+	case m.loggingIn:
+		b.WriteString(m.styles.Muted.Render("  Signing in…") + "\n")
+	case m.loginErr != "":
+		b.WriteString(m.styles.Error.Render("  "+m.loginErr) + "\n")
+	}
+	return b.String()
+}
+
+// activeTeamLabel names what the lists are narrowed to.
+func (m Model) activeTeamLabel() string {
+	if t, ok := m.activeTeam(); ok {
+		return t.Name
+	}
+	return "all"
+}
+
 func (m Model) renderTabs() string {
 	var tabs []string
 	for i, name := range sectionNames {
@@ -45,6 +75,9 @@ func (m Model) renderTabs() string {
 }
 
 func (m Model) renderBody() string {
+	if m.mode == modeLogin {
+		return m.renderLogin()
+	}
 	if m.err != nil {
 		return "\n" + m.styles.Error.Render(fmt.Sprintf("  Error: %v", m.err)) +
 			"\n" + m.styles.Muted.Render("  Press r to retry.")
@@ -149,25 +182,36 @@ func (m Model) renderFooter() string {
 	case modePasswordSet:
 		return withStatus("  tab·next field  enter·set password  esc·cancel")
 
+	case modeLogin:
+		return "\n" + m.styles.Footer.Render("  tab·next field  enter·sign in  esc·quit")
+
 	default:
 		switch m.activeSection {
 		case sectionIncidents:
-			return withStatus("  enter·detail  x·archive  f·filter  r·refresh  tab·section  q·quit")
+			return withStatus("  enter·detail  x·archive  f·filter  " + m.teamHint() + "r·refresh  tab·section  L·sign out  q·quit")
 		case sectionAlerts:
-			return withStatus("  enter·detail  f·filter  r·refresh  tab·section  q·quit")
+			return withStatus("  enter·detail  f·filter  " + m.teamHint() + "r·refresh  tab·section  q·quit")
 		case sectionStats:
 			return withStatus("  ↑/↓·scroll  r·refresh  tab·section  q·quit")
 		case sectionArchived:
-			return withStatus("  enter·detail  x·unarchive  r·refresh  tab·section  q·quit")
+			return withStatus("  enter·detail  x·unarchive  " + m.teamHint() + "r·refresh  tab·section  q·quit")
 		case sectionSchedule:
-			return withStatus("  +·assign day  W·assign week  d·del  ←/→·shift week  tab·section  r·refresh  q·quit")
+			return withStatus("  +·assign day  W·assign week  d·del  ←/→·shift week  " + m.teamHint() + "tab·section  r·refresh  q·quit")
 		case sectionUsers:
-			return withStatus("  n·new user  t·topic  d·delete  k·API keys  p·password  r·refresh  tab·section  q·quit")
+			return withStatus("  n·new user  t·topic  d·delete  k·API keys  p·password  r·refresh  L·sign out  q·quit")
 		}
 		return "\n" + m.styles.Footer.Render(m.help.ShortHelpView(m.keys.ShortHelp()))
 	}
 }
 
+// teamHint is the footer's team-switch key, shown only when there is a choice.
+func (m Model) teamHint() string {
+	if len(m.teams) > 1 {
+		return "T·team  "
+	}
+	return ""
+}
+
 func (m Model) confirmPrompt() string {
 	switch m.confirmTarget {
 	case confirmDeleteNote:
@@ -332,23 +376,41 @@ func (m Model) renderSchedule() string {
 		return "\n" + m.styles.Muted.Render("  Loading schedule…")
 	}
 
+	team, ok := m.scheduleTeam()
+	if !ok {
+		return "\n" + m.styles.Muted.Render("  You are not in any team, so there is no schedule to show.")
+	}
+
 	var onCallLine string
-	if m.currentOnCall != nil {
-		onCallLine = fmt.Sprintf("  On-call today: %s",
-			m.styles.AlertName.Render(m.currentOnCall.Username))
+	if len(m.currentOnCall) > 0 {
+		onCallLine = "  On-call today: " + m.styles.AlertName.Render(m.onCallNames())
 	} else {
 		onCallLine = m.styles.Muted.Render("  On-call today: nobody scheduled")
 	}
 
 	from := m.scheduleWindow
 	to := m.scheduleWindow.AddDate(0, 0, 6)
-	windowLabel := m.styles.Muted.Render(fmt.Sprintf("  %s — %s",
-		from.Format("Jan 02"), to.Format("Jan 02, 2006")))
+	windowLabel := m.styles.Muted.Render(fmt.Sprintf("  %s: %s — %s",
+		team.Name, from.Format("Jan 02"), to.Format("Jan 02, 2006")))
 
 	header := "\n" + spread(onCallLine, windowLabel, m.width) + "\n"
 	return header + m.scheduleTable.View()
 }
 
+// onCallNames lists who is on call today. With several teams each name carries
+// its team, since one person per team is on call and "alice, bob" alone would
+// not say whose.
+func (m Model) onCallNames() string {
+	parts := make([]string, len(m.currentOnCall))
+	for i, e := range m.currentOnCall {
+		parts[i] = e.Username
+		if len(m.teams) > 1 && e.TeamName != "" {
+			parts[i] += " (" + e.TeamName + ")"
+		}
+	}
+	return strings.Join(parts, ", ")
+}
+
 func (m Model) renderUserPicker() string {
 	if m.usersLoading {
 		return "\n" + m.styles.Muted.Render("  Loading users…")
@@ -441,6 +503,9 @@ func buildIncidentDetailContent(s Styles, inc api.Incident, timeline []api.Incid
 	b.WriteString("\n  " + title + strings.Repeat(" ", gap) + status + "\n\n")
 
 	// Timing and ownership
+	if inc.TeamName != "" {
+		b.WriteString(fmt.Sprintf("  Team:       %s\n", inc.TeamName))
+	}
 	b.WriteString(fmt.Sprintf("  Triggered:  %s  (%s)\n",
 		inc.TriggeredAt.UTC().Format("2006-01-02 15:04 UTC"), humanAgo(now, inc.TriggeredAt)))
 
@@ -461,6 +526,10 @@ func buildIncidentDetailContent(s Styles, inc api.Incident, timeline []api.Incid
 		b.WriteString(line(s.Muted, "  Acked:      not acknowledged"))
 	}
 
+	if inc.EscalationLevel > 0 {
+		b.WriteString(line(s.Snoozed, fmt.Sprintf("  Escalation: level %d", inc.EscalationLevel)))
+	}
+
 	if inc.IsSnoozed() {
 		b.WriteString(line(s.Snoozed, fmt.Sprintf("  Snoozed:    until %s  (%s)",
 			inc.SnoozedUntil.UTC().Format("2006-01-02 15:04 UTC"), humanUntil(now, *inc.SnoozedUntil))))
@@ -603,6 +672,8 @@ func eventLabel(e api.IncidentEvent) string {
 		// the only thing that says why nobody's phone rang.
 		return truncate(fmt.Sprintf("  Notification to %s failed · %s",
 			notifiedTarget(who), e.Detail), 52)
+	case api.EventDeadmanSilent:
+		return "  Dead man's switch went silent"
 	default:
 		label := "  " + e.Type
 		if e.Detail != "" {

main.go

@@ -7,6 +7,7 @@ import (
 
 	"git.ryuvia.com/niklas/terdut-tui/internal/api"
 	"git.ryuvia.com/niklas/terdut-tui/internal/config"
+	"git.ryuvia.com/niklas/terdut-tui/internal/session"
 	"git.ryuvia.com/niklas/terdut-tui/internal/theme"
 	"git.ryuvia.com/niklas/terdut-tui/internal/tui"
 	"git.ryuvia.com/niklas/terdut-tui/internal/updater"
@@ -45,8 +46,17 @@ func main() {
 		os.Exit(1)
 	}
 
-	client := api.NewClient(cfg.ServerURL, cfg.APIKey)
-	model := tui.NewModel(client, cfg.ServerURL, cfg.RefreshInterval, th)
+	client := api.NewClient(cfg.ServerURL)
+	if token := session.Load(cfg.ServerURL); token != "" {
+		client.SetSession(token)
+	}
+	note := ""
+	if cfg.LegacyAPIKey {
+		note = "api_key in config.yaml is no longer used: sign in with your username and password"
+	}
+	model := tui.NewModel(client, cfg.ServerURL, cfg.RefreshInterval, th).
+		WithDefaultTeam(cfg.Team).
+		WithLogin(cfg.Username, note)
 
 	p := tea.NewProgram(model, tea.WithAltScreen())
 	if _, err := p.Run(); err != nil {