feat: Phase 5 - Calendar + Dashboard + Search

Calendar:
- GET /api/domains/[domainId]/calendar/events?from=&to= — returns tasks, habits, projects, milestones
- PATCH /api/domains/[domainId]/tasks/[id]/schedule — drag-to-reschedule with activity feed
- Calendar UI with month/week/day views via react-big-calendar
- Drag-to-reschedule with SSE updates
- Filter by entity type and domain
- Keyboard shortcuts: t=today, m/w/d=view, ←/→=navigate
- Mobile: auto-switches to day view on small screens

Dashboard:
- GET/PUT /api/domains/[domainId]/dashboard — layout stored in domain custom_fields
- 8 per-widget data endpoints (today-tasks, habit-checklist, weekly-stats, project-progress, upcoming-calendar, recent-notes, activity-feed, quick-capture)
- react-grid-layout with responsive breakpoints (12/8/4 cols)
- Drag-to-reorder, resize, add/remove widgets
- Edit mode toggle, per-workspace layout persistence
- Widget error boundary

Search:
- tsvector columns + GIN indexes on tasks, notes, projects, habits, domains
- GET /api/search?q=&types=&domain= — ranked results with ts_headline snippets
- Dedicated search page with grouped results, filters, recent searches (localStorage)
- Empty state with hints

Schema:
- Added custom_fields jsonb column to domains table (migration 0002)
- Removed stale root app/ directory

Build: passes, typecheck: passes, tests: 18/18 wikilink-parser tests pass

apps/web/lib/stores/use-dashboard-store.ts

@@ -23,14 +23,14 @@ interface DashboardState {
 }
 
 const defaultWidgets: WidgetConfig[] = [
-  { id: 'today-tasks', type: 'TodayTasks', x: 0, y: 0, w: 6, h: 4, visible: true },
-  { id: 'habit-checklist', type: 'HabitChecklist', x: 6, y: 0, w: 3, h: 4, visible: true },
-  { id: 'weekly-stats', type: 'WeeklyStats', x: 9, y: 0, w: 3, h: 4, visible: true },
-  { id: 'project-progress', type: 'ProjectProgress', x: 0, y: 4, w: 4, h: 3, visible: true },
-  { id: 'habit-streaks', type: 'HabitStreaks', x: 4, y: 4, w: 4, h: 3, visible: true },
-  { id: 'calendar-mini', type: 'CalendarMini', x: 8, y: 4, w: 4, h: 3, visible: true },
-  { id: 'quick-add', type: 'QuickAdd', x: 0, y: 7, w: 3, h: 3, visible: true },
-  { id: 'recent-activity', type: 'RecentActivity', x: 3, y: 7, w: 9, h: 3, visible: true },
+  { id: 'today-tasks', type: "Today's Tasks", x: 0, y: 0, w: 6, h: 4, visible: true },
+  { id: 'habit-checklist', type: 'Habit Checklist', x: 6, y: 0, w: 3, h: 4, visible: true },
+  { id: 'weekly-stats', type: 'Weekly Stats', x: 9, y: 0, w: 3, h: 4, visible: true },
+  { id: 'project-progress', type: 'Project Progress', x: 0, y: 4, w: 4, h: 3, visible: true },
+  { id: 'upcoming-calendar', type: 'Upcoming Calendar', x: 4, y: 4, w: 4, h: 3, visible: true },
+  { id: 'recent-notes', type: 'Recent Notes', x: 8, y: 4, w: 4, h: 3, visible: true },
+  { id: 'activity-feed', type: 'Activity Feed', x: 0, y: 7, w: 6, h: 3, visible: true },
+  { id: 'quick-capture', type: 'Quick Capture', x: 6, y: 7, w: 3, h: 3, visible: true },
 ];
 
 export const useDashboardStore = create<DashboardState>()(