feat(m13): cross-resource search + dashboard completion, tests, e2e

- SearchService (cross-resource keyword search across board/chat/todo/file/
  event/meeting/milestone/note with type filter, project isolation)
- DashboardService (project dashboard: in-progress todos, near-due(7d),
  latest chat/board/notes/files(5), next meeting, milestones w/ progress,
  recent activity(10); personal dashboard: my projects, incomplete todos,
  upcoming meetings, unread notifications, overdue tasks, recent activity)
- CalendarRepository.findByProject
- APIs: GET /api/projects/:projectId/search, GET /api/dashboard
- Screens: complete personal dashboard, complete project overview,
  search page + SearchForm, ProjectNav 検索 link
- Unit tests (SearchService, DashboardService) + e2e dashboard

app/dashboard/page.tsx

@@ -1,9 +1,9 @@
 import { redirect } from 'next/navigation';
 import { getCurrentUser, toPublicUser } from '@/lib/auth/getCurrentUser';
-import { createProjectService } from '@/lib/api/services';
+import { createDashboardService } from '@/lib/api/services';
 import { Header } from '@/components/layout/Header';
-import { ProjectCard } from '@/components/project/ProjectCard';
 import { CreateProjectForm } from '@/components/project/CreateProjectForm';
+import { DashboardWidget } from '@/components/project/DashboardWidget';
 
 export const dynamic = 'force-dynamic';
 
@@ -13,31 +13,75 @@ export default async function DashboardPage() {
     redirect('/login');
   }
 
-  const service = createProjectService();
-  const projects = service.getMyProjects(user.id);
+  const service = createDashboardService();
+  const dashboard = service.getPersonalDashboard(user.id);
 
   return (
     <div className="min-h-screen bg-gray-50">
       <Header user={toPublicUser(user)} />
       <main className="mx-auto max-w-4xl space-y-6 p-6">
         <h1 className="text-2xl font-bold">ダッシュボード</h1>
+
+        <div className="grid gap-4 sm:grid-cols-2">
+          <DashboardWidget title="参加プロジェクト" empty="ありません">
+            {dashboard.projects.map((p) => (
+              <a
+                key={p.id}
+                href={`/projects/${p.id}`}
+                className="block rounded border px-3 py-2 text-sm hover:bg-gray-50"
+              >
+                {p.name}（{p.status}）
+              </a>
+            ))}
+          </DashboardWidget>
+
+          <DashboardWidget
+            title={`未読通知 (${dashboard.unreadNotificationCount})`}
+            empty="未読はありません"
+          >
+            <a
+              href="/notifications"
+              className="text-sm text-blue-600 hover:underline"
+            >
+              通知一覧を開く
+            </a>
+          </DashboardWidget>
+
+          <DashboardWidget title="未完了ToDo" empty="ありません">
+            {dashboard.incompleteTodos.map((t) => (
+              <p key={t.id} className="text-sm">
+                {t.title}
+                {t.dueDate ? `（期限: ${t.dueDate}）` : ''}
+              </p>
+            ))}
+          </DashboardWidget>
+
+          <DashboardWidget title="期限切れタスク" empty="ありません">
+            {dashboard.overdueTasks.map((t) => (
+              <p key={t.id} className="text-sm text-red-600">
+                {t.title}（期限: {t.dueDate}）
+              </p>
+            ))}
+          </DashboardWidget>
+
+          <DashboardWidget title="近日中のミーティング" empty="ありません">
+            {dashboard.upcomingMeetings.map((m) => (
+              <p key={m.id} className="text-sm">
+                {m.title}（{m.startAt}）
+              </p>
+            ))}
+          </DashboardWidget>
+
+          <DashboardWidget title="最近のアクティビティ" empty="ありません">
+            {dashboard.recentActivity.map((l) => (
+              <p key={l.id} className="text-sm">
+                {l.action}（{l.targetType}）
+              </p>
+            ))}
+          </DashboardWidget>
+        </div>
+
         <CreateProjectForm />
-        <section>
-          <h2 className="mb-3 text-sm font-semibold text-gray-700">
-            参加プロジェクト
-          </h2>
-          {projects.length === 0 ? (
-            <p className="text-sm text-gray-400">
-              参加しているプロジェクトはありません。
-            </p>
-          ) : (
-            <div className="grid gap-3 sm:grid-cols-2">
-              {projects.map((project) => (
-                <ProjectCard key={project.id} project={project} />
-              ))}
-            </div>
-          )}
-        </section>
       </main>
     </div>
   );