unified agent indicator at end of conversation

- New AgentIndicator component: replaces 3 separate indicators
  (loading dots, ToolCallGroup summary, activity bar) with one
- Positioned as last item in message list — scrolls naturally
- Shows current tool action: 'Researching lxc:nfs-export…' etc
- Spinner during work, check on completion, X on error
- Fades out 3s after turn completes
- Activity bar, loading dots, statusLabel removed from Chat
- Continue button moved to sidebar session panel

plans/index.md

@@ -14,7 +14,9 @@ went sideways, open an investigation.
 | 2026-07-08 | [Liveness, drift, and UX cohesion](2026-07-08-liveness-drift-and-ux-cohesion.md) | In Progress — Phase 5 deferred |
 | 2026-07-10 | [General gated execution: unlimited actions, gated by risk](2026-07-10-general-gated-execution.md) | In Progress — enum retirement + auto-act revival still open |
 | 2026-07-11 | [Nomos agent code review: gaps and improvement plan](2026-07-11-nomos-agent-code-review.md) | In Progress — only C1 (unauthenticated nomos gateway) still open, deferred |
-| 2026-07-14 | [Session reliability & UX audit](2026-07-14-session-reliability-and-ux-audit.md) | Planned — just audited, not started |
+| 2026-07-14 | [Session reliability & UX audit](2026-07-14-session-reliability-and-ux-audit.md) | Done — all 21 fixes deployed |
+| 2026-07-14 | [Tool timeline in sidebar](2026-07-14-tool-timeline-sidebar.md) | Done — deployed v0.3.2 |
+| 2026-07-14 | [Unified agent activity indicator](2026-07-14-unified-agent-indicator.md) | Done — deployed v0.3.3 |
 
 ## Done