feat(m7): markdown notes with CRUD, preview, search, tests, e2e

- ProjectNoteRepository (CRUD, soft-delete, search title/body/tags,
  pinned-first ordering, index usage) + NoteService (membership permission,
  author/admin edit/delete, note_updated notification to other members,
  note_created/note_updated activity logs, pin/tags)
- APIs: notes list/create/detail/edit/delete
- Screens: notes list + NoteForm, note detail + NoteEditor + MarkdownBody
  preview, ProjectNav メモ link
- Unit tests (ProjectNoteRepository, NoteService) + e2e markdown-notes.spec

lib/api/services.ts

@@ -9,6 +9,8 @@ import { NotificationService } from '@/services/NotificationService';
 import { ActivityLogService } from '@/services/ActivityLogService';
 import { BoardService } from '@/services/BoardService';
 import { BoardRepository } from '@/repositories/BoardRepository';
+import { NoteService } from '@/services/NoteService';
+import { ProjectNoteRepository } from '@/repositories/ProjectNoteRepository';
 
 /**
  * Route Handler用に各Repository/Serviceを構築するファクトリ。
@@ -42,6 +44,16 @@ export function createBoardService(): BoardService {
   );
 }
 
+export function createNoteService(): NoteService {
+  const db = getDb();
+  return new NoteService(
+    new ProjectNoteRepository(db),
+    new ProjectMemberRepository(db),
+    new NotificationService(new NotificationRepository(db)),
+    new ActivityLogService(new ActivityLogRepository(db))
+  );
+}
+
 export function createUserRepository(): UserRepository {
   return new UserRepository(getDb());
 }