feat(mvp): phase 8 - integration, testing & deployment

Fix all build/type/lint errors (zod 3.25 compat wrapper, Svelte 5 fixes),
write 115 unit tests across 10 test files, expand seed script with demo
data, update Docker config with migration on startup.

plans/mvp-web-app-launcher/PLAN.md

@@ -31,10 +31,10 @@ Build a self-hosted web application launcher/dashboard for a TrueNAS server envi
 - [x] Phase 2: Database Schema & Services Layer [backend] → [subplan](./phase-2-database-services.md)
 - [x] Phase 3: Authentication System [fullstack] → [subplan](./phase-3-authentication.md)
 - [x] Phase 4: App Registry & Healthcheck [fullstack] → [subplan](./phase-4-app-healthcheck.md)
-- [ ] Phase 5: Board, Section & Widget System [fullstack] → [subplan](./phase-5-board-widgets.md)
+- [x] Phase 5: Board, Section & Widget System [fullstack] → [subplan](./phase-5-board-widgets.md)
 - [x] Phase 6: Admin Panel [fullstack] → [subplan](./phase-6-admin-panel.md)
 - [x] Phase 7: UI Polish & Ambient Backgrounds [frontend] → [subplan](./phase-7-ui-polish.md)
-- [ ] Phase 8: Integration, Testing & Deployment [fullstack] → [subplan](./phase-8-integration-deploy.md)
+- [x] Phase 8: Integration, Testing & Deployment [fullstack] → [subplan](./phase-8-integration-deploy.md)
 
 ## Phase Progress Log
 
@@ -47,7 +47,7 @@ Build a self-hosted web application launcher/dashboard for a TrueNAS server envi
 | Phase 5: Board & Widgets | fullstack | ✅ Complete | ⬜ | ⬜ | ⬜ |
 | Phase 6: Admin Panel | fullstack | ✅ Complete | ⬜ | ⬜ | ⬜ |
 | Phase 7: UI Polish | frontend | ✅ Complete | ⬜ | ⬜ | ⬜ |
-| Phase 8: Integration & Deploy | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 8: Integration & Deploy | fullstack | ✅ Complete | ✅ | ✅ | ⬜ |
 
 ## Final Review
 - [ ] Comprehensive code review