feat(v029): useInbox view enum + counts + setView + listByStatus/countsByStatus IPC

- store.ts: view enum ('inbox'|'completed'|'archived'|'trash'|'settings') + counts +
  setView + loadByView. setShowSettings delegates to setView (mirror).
- types.ts + preload + ipc/inboxApi: listByStatus + countsByStatus IPC.
- NoteRepository.countByStatus 신규.
- store.view.test (5) + NoteRepository.countByStatus test (1).

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

tests/unit/NoteRepository.test.ts

@@ -966,6 +966,24 @@ describe('NoteRepository — setStatus + listByStatus', () => {
     expect(note.moveReason).toBeNull();
   });
 
+  it('countByStatus returns accurate count per status', () => {
+    const a = repo.create({ rawText: 'a' }).id;  // active
+    repo.create({ rawText: 'b' });               // active
+    const c = repo.create({ rawText: 'c' }).id;
+    repo.setStatus(c, 'completed', null, new Date('2026-05-10T00:00:00.000Z'));
+    const d = repo.create({ rawText: 'd' }).id;
+    repo.setStatus(d, 'archived', null, new Date('2026-05-10T00:00:00.000Z'));
+    const e = repo.create({ rawText: 'e' }).id;
+    repo.setStatus(e, 'trashed', null, new Date('2026-05-10T00:00:00.000Z'));
+
+    expect(repo.countByStatus('active')).toBe(2);
+    expect(repo.countByStatus('completed')).toBe(1);
+    expect(repo.countByStatus('archived')).toBe(1);
+    expect(repo.countByStatus('trashed')).toBe(1);
+    // sanity — a 가 여전히 active.
+    expect(repo.findById(a)!.status).toBe('active');
+  });
+
   it('restoreNote sets status=active + clears moveReason', () => {
     const { id } = repo.create({ rawText: 'r' });
     repo.setStatus(id, 'trashed', '실수', new Date('2026-05-15T00:00:00.000Z'));