feat(KB-502): implement dashboard multi-project UX

- Add project selector, health badge, and overview components to dashboard
- Add multi-project API functions (api.ts) for cross-project operations
- Update App.tsx with project context and navigation improvements
- Add script-store.ts for centralized project script management
- Extend types with multi-project support: SetupState, MigrationOptions, etc.
- Add project runtime fields: baseCommitSha, modifiedFiles, missionId, sliceId
- Add setupComplete to global settings for first-run wizard tracking
- Add project-level settings: scripts, setupScript, ntfyDashboardHost
- Add backward-compatible addSteeringComment method to TaskStore

.changeset/dashboard-multi-project-ux.md

@@ -4,12 +4,10 @@
 
 Add multi-project UX with overview page, drill-down, and setup wizard
 
-- New Project Overview page showing all registered projects in a responsive grid with health metrics
-- Project selector dropdown in header for quick context switching (appears when 2+ projects)
-- Project drill-down into per-project task views with back navigation to overview
-- Setup wizard for first-run project registration with auto-detection and manual entry flows
-- Global activity feed with project attribution badges when viewing all projects
-- Project health polling with active tasks, running agents, and completion counts
-- Empty states and loading skeletons for better UX during data fetching
-- Keyboard navigation support in project selector (arrow keys, enter, escape)
-- LocalStorage persistence for wizard state (resume capability) and view preferences
+- New Project Overview page showing all registered projects
+- Project selector in header for switching contexts
+- Project drill-down into per-project task views
+- Setup wizard for first-run project registration
+- Global activity feed with project attribution
+- Added project management API routes (detect, register, update, etc.)
+- Fixed App.tsx variable ordering issues