feat(expiry): NoteRepository.trashBatch atomic (#5 v0.2.3)

tests/unit/NoteRepository.test.ts

@@ -529,3 +529,48 @@ describe('NoteRepository.findExpiredCandidates', () => {
     expect(r.map((n) => n.id)).toEqual([past]);
   });
 });
+
+describe('NoteRepository.trashBatch', () => {
+  let db: Database.Database;
+  let repo: NoteRepository;
+  beforeEach(() => {
+    db = new Database(':memory:');
+    runMigrations(db);
+    repo = new NoteRepository(db);
+  });
+
+  it('atomically trashes all valid ids and returns trashedCount', () => {
+    const a = repo.create({ rawText: 'a' }).id;
+    const b = repo.create({ rawText: 'b' }).id;
+    const c = repo.create({ rawText: 'c' }).id;
+    const r = repo.trashBatch([a, b, c], '2026-05-01T12:00:00.000Z');
+    expect(r.trashedCount).toBe(3);
+    expect(repo.findById(a)!.deletedAt).toBe('2026-05-01T12:00:00.000Z');
+    expect(repo.findById(b)!.deletedAt).toBe('2026-05-01T12:00:00.000Z');
+    expect(repo.findById(c)!.deletedAt).toBe('2026-05-01T12:00:00.000Z');
+    expect(db.prepare('SELECT COUNT(*) AS c FROM pending_jobs WHERE note_id IN (?,?,?)').get(a, b, c))
+      .toMatchObject({ c: 0 });
+  });
+
+  it('returns trashedCount=0 for empty array (no-op)', () => {
+    const r = repo.trashBatch([], '2026-05-01T12:00:00.000Z');
+    expect(r.trashedCount).toBe(0);
+  });
+
+  it('skips ids that are already trashed (idempotent — count = 0 transitions)', () => {
+    const a = repo.create({ rawText: 'a' }).id;
+    repo.trash(a, '2026-04-30T00:00:00.000Z');
+    const r = repo.trashBatch([a], '2026-05-01T12:00:00.000Z');
+    expect(r.trashedCount).toBe(0);
+    expect(repo.findById(a)!.deletedAt).toBe('2026-04-30T00:00:00.000Z');
+  });
+
+  it('counts only the valid active ids (mix of valid + invalid + already-trashed)', () => {
+    const a = repo.create({ rawText: 'a' }).id;
+    const b = repo.create({ rawText: 'b' }).id;
+    repo.trash(b, '2026-04-30T00:00:00.000Z');
+    const r = repo.trashBatch([a, b, 'nonexistent-id'], '2026-05-01T12:00:00.000Z');
+    expect(r.trashedCount).toBe(1);
+    expect(repo.findById(a)!.deletedAt).toBe('2026-05-01T12:00:00.000Z');
+  });
+});