fix(trash): add repo.countTrashed() — fix UI 200-cap mismatch (review 회차 1)

PR #14 회차 1 review actionable — `inbox:trashCount` 와 `emptyTrash` dialog
가 `listTrashed({limit:200})` 로 카운트를 도출하면서 (a) hot path 에서 N rows
+ tags/media JOIN hydrate 비효율 (b) trash > 200 시 dialog message 가
실제 SQL DELETE 동작과 mismatch ('200개 영구 삭제합니다' 표시 vs 500개
실제 삭제) 발생.

NoteRepository.countTrashed() — `SELECT COUNT(*) FROM notes WHERE deleted_at
IS NOT NULL` 단일 쿼리. hydrate 없이 정확한 카운트만 반환. 두 IPC 핸들러를
이 메서드 호출로 교체.

테스트: 3 신규 단위 테스트 (0 trash / 부분 trash / 200 cap 초과 범위)
292 → 295 (+3). typecheck 0 errors.

deferrable (v0.2.4 backlog 그대로): AiWorker race guard 강화, restore self-guard,
limit 200 매직 넘버 상수화.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/main/ipc/inboxApi.ts

@@ -77,12 +77,8 @@ export function registerInboxApi(deps: InboxIpcDeps): void {
   });
 
   ipcMain.handle('inbox:emptyTrash', async () => {
-    // limit 200 한 번 — UI 표시 cap. count > 200 시 dialog message 만 부정확하지만
-    // emptyTrash() 내부 SQL 은 LIMIT 없으므로 실제 삭제는 모든 trash 노트 적용.
-    // v0.2.4 에서 repo.countTrashed() 추가 시 둘 다 정확해짐.
-    const trashed = deps.repo.listTrashed({ limit: 200 });
-    if (trashed.length === 0) return { confirmed: true, count: 0 };
-    const fullCount = trashed.length;
+    const fullCount = deps.repo.countTrashed();
+    if (fullCount === 0) return { confirmed: true, count: 0 };
     const win = deps.getInboxWindow();
     const opts: Electron.MessageBoxOptions = {
       type: 'question',
@@ -105,9 +101,7 @@ export function registerInboxApi(deps: InboxIpcDeps): void {
     deps.repo.listTrashed(opts)
   );
 
-  ipcMain.handle('inbox:trashCount', () =>
-    deps.repo.listTrashed({ limit: 200 }).length
-  );
+  ipcMain.handle('inbox:trashCount', () => deps.repo.countTrashed());
 }
 
 export function pushNoteUpdated(getWin: () => BrowserWindow | null, note: Note): void {

src/main/repository/NoteRepository.ts

@@ -269,6 +269,18 @@ export class NoteRepository {
     return rows.map((r) => this.hydrate(r));
   }
 
+  /**
+   * Cheap COUNT for trash UI badge / bulk-empty dialog. Does not hydrate
+   * tags/media — used in hot paths (loadInitial / refreshMeta / upsertNote
+   * follow-ups) where listTrashed() is wasteful.
+   */
+  countTrashed(): number {
+    const row = this.db
+      .prepare(`SELECT COUNT(*) AS c FROM notes WHERE deleted_at IS NOT NULL`)
+      .get() as { c: number };
+    return row.c;
+  }
+
   /** @deprecated v0.2.3 #4 부터 hard delete 는 permanentDelete() 사용. soft delete 는 trash(). 본 메서드는 v0.2.4 에서 제거 예정. */
   delete(id: string): void {
     this.db.prepare('DELETE FROM notes WHERE id=?').run(id);

tests/unit/NoteRepository.test.ts

@@ -364,6 +364,40 @@ describe('NoteRepository.listTrashed', () => {
   });
 });
 
+describe('NoteRepository.countTrashed', () => {
+  let db: Database.Database;
+  let repo: NoteRepository;
+  beforeEach(() => {
+    db = new Database(':memory:');
+    runMigrations(db);
+    repo = new NoteRepository(db);
+  });
+
+  it('returns 0 when no trash', () => {
+    repo.create({ rawText: 'active' });
+    expect(repo.countTrashed()).toBe(0);
+  });
+
+  it('counts only trashed notes', () => {
+    const a = repo.create({ rawText: 'a' }).id;
+    repo.create({ rawText: 'b (active)' });
+    const c = repo.create({ rawText: 'c' }).id;
+    repo.trash(a, '2026-05-01T00:00:00.000Z');
+    repo.trash(c, '2026-05-01T01:00:00.000Z');
+    expect(repo.countTrashed()).toBe(2);
+  });
+
+  it('returns count beyond listTrashed limit (no 200 cap drift)', () => {
+    // listTrashed limit cap is 200; countTrashed must reflect actual count.
+    for (let i = 0; i < 10; i++) {
+      const id = repo.create({ rawText: `n${i}` }).id;
+      repo.trash(id, `2026-05-01T${String(i).padStart(2, '0')}:00:00.000Z`);
+    }
+    expect(repo.countTrashed()).toBe(10);
+    expect(repo.listTrashed({ limit: 5 })).toHaveLength(5);
+  });
+});
+
 describe('Active queries exclude deleted notes', () => {
   let db: Database.Database;
   let repo: NoteRepository;