feat(ipc): inboxApi list/search/counts 에 notebookId 옵션 + counts archived 제거

- InboxApi.listNotes / listByStatus / search signature 에 notebookId? 옵션 추가
- countsByStatus 반환 타입에서 archived 제거 (active/completed/trashed 만)
- inbox:list-by-status 핸들러: archived 수신 시 빈 배열 graceful fallback
- inbox:counts-by-status 핸들러: notebookId opts 추가, archived 키 제거
- store.ts: countsByStatus 결과 spread 시 archived:0 fallback (Task 15/16 까지 UI 보존)
- App.test.tsx: countsByStatus mock 에서 archived 제거 + 탭 count 기대값 보관(0) 으로 조정

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

tests/unit/App.test.tsx

@@ -7,7 +7,7 @@ vi.mock('../../src/renderer/inbox/api.js', () => ({
   inboxApi: {
     listNotes: vi.fn(async () => []),
     listByStatus: vi.fn(async () => []),
-    countsByStatus: vi.fn(async () => ({ active: 0, completed: 0, archived: 0, trashed: 0 })),
+    countsByStatus: vi.fn(async () => ({ active: 0, completed: 0, trashed: 0 })),
     getContinuity: vi.fn(async () => ({
       weekStart: '', weekCount: 0, weekTarget: 7,
       consecutiveCompleteWeeks: 0, showRecoveryToast: false, lastNoteAt: null
@@ -125,14 +125,16 @@ describe('App header — 4 tabs', () => {
     });
     // loadInitial 이 비동기로 counts 를 덮어씀 — onboarding wizard async gate (Task 12) 도입
     // 후 render 가 await 후 발생하므로 mock 의 countsByStatus 가 테스트 기대값을 반환하도록 갱신.
-    vi.mocked(inboxApi.countsByStatus).mockResolvedValue({ active: 5, completed: 3, archived: 2, trashed: 1 });
+    // v0.4 — countsByStatus 응답에서 archived 제거 (store 가 archived:0 fallback 추가).
+    vi.mocked(inboxApi.countsByStatus).mockResolvedValue({ active: 5, completed: 3, trashed: 1 });
   });
 
   it('renders 4 tabs with counts', async () => {
     render(<App />);
     expect(await screen.findByRole('tab', { name: /Inbox\(5\)/ })).toBeInTheDocument();
     expect(screen.getByRole('tab', { name: /완료\(3\)/ })).toBeInTheDocument();
-    expect(screen.getByRole('tab', { name: /보관\(2\)/ })).toBeInTheDocument();
+    // v0.4 — archived count 는 IPC 응답에서 제거됨 → store 가 0 fallback. 보관 탭은 Task 15 에서 제거 예정.
+    expect(screen.getByRole('tab', { name: /보관\(0\)/ })).toBeInTheDocument();
     expect(screen.getByRole('tab', { name: /휴지통\(1\)/ })).toBeInTheDocument();
   });