Phase 4: Deploy + Smoke Test (#463) (#464)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

docs/scratchpads/mosaic-stack-go-live-mvp-20260222.md

@@ -60,6 +60,42 @@ Estimated total: ~50K tokens
 | ------- | ---------- | --------- | ---------- | ------------------------------------------------------ |
 | S2      | 2026-02-23 | phase-2   | 3/3        | COMPLETE — PR #460 merged (7581d26), issue #459 closed |
 
+### 2026-02-23: Phase-3 Completion Summary
+
+- PR #462 merged to main (squash), commit 458cac7
+- Issue #461 closed
+- 3/3 tasks done (MS-P3-001 through MS-P3-003)
+- WebSocket emits wired into RunnerJobsService (create/cancel/retry/updateStatus/updateProgress)
+- Dashboard polling at 30s interval + OrchestratorSessions progress bars + step status labels
+- Review: approve (0 critical, 2 important fixed: stale-data guard, enum consistency)
+- All quality gates green: lint 8/8, typecheck 7/7, test 8/8 (no cache)
+
+| Session | Date       | Milestone | Tasks Done | Outcome                                                |
+| ------- | ---------- | --------- | ---------- | ------------------------------------------------------ |
+| S2 cont | 2026-02-23 | phase-3   | 3/3        | COMPLETE — PR #462 merged (458cac7), issue #461 closed |
+
+### 2026-02-23: Phase-4 Completion Summary
+
+- 3/3 tasks done (MS-P4-001 through MS-P4-003)
+- Built stack-api and stack-web Docker images locally, pushed to git.mosaicstack.dev/mosaic/ registry
+- Fixed root route redirect: removed app/page.tsx that was intercepting / and redirecting to /tasks
+- Coolify service stop+start cycle required (restart alone caused flaky proxy routing)
+- Proxy routing note: Traefik route propagation takes ~5min after service restart; multiple rapid cycles cause intermittent 504s
+- Smoke test results: web HTTP 200 (0.19s), API health HTTP 200 (0.10s), dashboard API HTTP 401 (auth required)
+- Dashboard verified in browser: all 6 widgets rendering, auth working (User: Jarvis), dark/light theme toggle
+- All quality gates green: lint 8/8, typecheck 7/7, test 8/8
+- Screenshot saved: docs/scratchpads/smoke-test-dashboard.png
+
+| Session | Date       | Milestone | Tasks Done | Outcome                 |
+| ------- | ---------- | --------- | ---------- | ----------------------- |
+| S3      | 2026-02-23 | phase-4   | 3/3        | COMPLETE — mission done |
+
+### Mission Summary
+
+- 4 milestones, 16 tasks, 4 PRs (#458, #460, #462, + phase-4 PR), 4 issues (#457, #459, #461, #463)
+- Success criteria met: dashboard at mosaic.woltje.com, task ingestion API, agent cycle visibility, deployed + smoke-tested
+- Known infra issue: Coolify proxy routing is flaky after rapid restart cycles; needs 5min stabilization
+
 ## Open Questions
 
 ## Corrections