Show a colour-coded team picker instead of cycling with T

T used to silently cycle Model.activeTeamID through the caller's teams with
no visible list of choices. It now opens a full picker (modelled on the
existing user picker) listing every team plus "All teams", each with a
stable identity colour from a new six-colour theme palette. The same colour
now also shows as a bullet next to "team: <name>" in the header, so the
active team stays visible without opening the picker.

Adds an Identity palette to the theme package (six hues, skipping the ones
that already mean firing/critical), Styles.TeamColor to pick one by team id,
and identity_1..6 as theme-file tokens alongside the existing twelve so a
fully custom theme can still set every token.

internal/tui/view.go

@@ -28,7 +28,11 @@ 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())
+		dot := m.styles.Muted.Render("●")
+		if t, ok := m.activeTeam(); ok {
+			dot = m.styles.TeamColor(t.ID).Render("●")
+		}
+		title += "  " + dot + m.styles.Muted.Render(" team: "+m.activeTeamLabel())
 	}
 	right := m.styles.Muted.Render(m.serverURL)
 	return spread(title, right, m.width)
@@ -153,6 +157,8 @@ func (m Model) renderBody() string {
 		}
 	case modeUserPicker:
 		return m.renderUserPicker()
+	case modeTeamPicker:
+		return m.renderTeamPicker()
 	case modeUserCreate:
 		return m.renderUserCreate()
 	case modeUserNotifyEdit:
@@ -210,6 +216,9 @@ func (m Model) renderFooter() string {
 		}
 		return withStatus(fmt.Sprintf("  j/k·navigate  enter·assign %s  esc·cancel", scope))
 
+	case modeTeamPicker:
+		return withStatus("  j/k·navigate  enter·select  esc·cancel")
+
 	case modeUserCreate:
 		return withStatus("  tab·next field  enter·create  esc·cancel")
 
@@ -496,6 +505,11 @@ func (m Model) renderUserPicker() string {
 	return header + m.userPickerTable.View()
 }
 
+func (m Model) renderTeamPicker() string {
+	header := "\n  " + m.styles.Bold.Render("Select a team:") + "\n\n"
+	return header + m.teamPickerTable.View()
+}
+
 // ── Detail ─────────────────────────────────────────────────────────────────
 
 func (m Model) renderDetail() string {