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/app/api/domains/[domainId]/dashboard/widgets/recent-notes/route.ts

@@ -0,0 +1,34 @@
+// AGENT INSTRUCTION: After every write (INSERT/UPDATE/DELETE), you MUST:
+// 1. Insert activity feed entry
+// 2. Call pg.notify('project_e_events', JSON.stringify({ type, action, id, workspace_id }))
+// See AGENTS.md for full rules.
+
+import { NextRequest, NextResponse } from 'next/server';
+import { withAuth, requireWorkspaceAccess } from '@/lib/auth';
+import { db, notes } from '@project-e/db';
+import { and, desc, eq, isNull } from 'drizzle-orm';
+
+type RouteContext = { params: Promise<{ domainId: string }> };
+
+// GET /api/domains/[domainId]/dashboard/widgets/recent-notes
+export const GET = withAuth<RouteContext>(async (request: NextRequest, user, context) => {
+  const { domainId } = await context!.params;
+  await requireWorkspaceAccess(domainId);
+
+  const items = await db.select({
+    id: notes.id,
+    title: notes.title,
+    updatedAt: notes.updatedAt,
+    isPinned: notes.isPinned,
+  })
+    .from(notes)
+    .where(and(
+      eq(notes.domainId, domainId),
+      eq(notes.isArchived, false),
+      isNull(notes.deletedAt),
+    ))
+    .orderBy(desc(notes.updatedAt))
+    .limit(5);
+
+  return NextResponse.json({ items });
+});