feat(ux): NoteCard chip affordance 강화 + 헤더 사이드바 토글 + default visible + 창 크기

dogfood 발견 사항 묶음:

- **NotebookChip** 시각 강화 — 청색 배경 + 📓 아이콘 + ▾ caret + dropdown
  헤더 '이동할 노트북'. 클릭 시 다른 노트북 dropdown 명확히 발견 가능.
  다른 노트북 없으면 disabled state.
- **헤더 좌측 ☰ 햄버거 버튼** — 마우스로 사이드바 토글 (Cmd/Ctrl+B 와 동일).
- **사이드바 default visible** — settings.getSidebarVisible 의 default false→true,
  store init 도 동일. 기존 사용자가 명시적으로 false 저장했다면 그 값 유지.
- **inboxWindow 기본 크기 확장** — 900×720 → 1200×800. 사이드바 240px 가
  default 가시화되므로 main 영역 확보.

851 tests pass + typecheck clean.

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

src/main/services/SettingsService.ts

@@ -186,7 +186,7 @@ export class SettingsService {
   // v0.4 Task 15 — sidebar 레이아웃 영속화.
   async getSidebarVisible(): Promise<boolean> {
     const s = await this.load();
-    return s.sidebar_visible ?? false;
+    return s.sidebar_visible ?? true;
   }
 
   async setSidebarVisible(v: boolean): Promise<void> {

src/main/windows/inboxWindow.ts

@@ -22,8 +22,8 @@ export function createInboxWindow(opts: { visible?: boolean } = {}): BrowserWind
   }
 
   inboxWindow = new BrowserWindow({
-    width: 900,
+    width: 1200,
-    height: 720,
+    height: 800,
     show: false,
     webPreferences: {
       preload: join(__dirname, '../preload/index.js'),

src/renderer/inbox/App.tsx

@@ -118,6 +118,17 @@ export function App(): React.ReactElement {
       <Sidebar />
       <main style={{ flex: 1, overflowY: 'auto' }}>
       <div className="header">
+        <button
+          onClick={() => useInbox.getState().toggleSidebar()}
+          aria-label="사이드바 토글"
+          title="사이드바 토글 (Cmd/Ctrl+B)"
+          style={{
+            background: 'none', border: 'none', cursor: 'pointer',
+            fontSize: 18, padding: '0 8px 0 0', color: '#444', lineHeight: 1
+          }}
+        >
+          ☰
+        </button>
         <h1 style={{ fontSize: 18, margin: 0 }}>Inkling</h1>
         <div style={{ display: 'flex', gap: 6, marginLeft: 12 }}>
           {(

src/renderer/inbox/components/NoteCard.tsx

@@ -115,29 +115,38 @@ function NotebookChip({ current, notebooks, onMove }: {
   onMove: (id: string) => Promise<void>;
 }): React.ReactElement {
   const [open, setOpen] = useState(false);
+  const others = notebooks.filter((nb) => nb.id !== current.id);
+  const hasOthers = others.length > 0;
   return (
     <span style={{ position: 'relative', display: 'inline-block' }}>
       <button
-        onClick={() => setOpen(!open)}
+        onClick={() => hasOthers && setOpen(!open)}
-        title="다른 노트북으로 이동"
+        title={hasOthers ? '다른 노트북으로 이동' : '현재 노트북'}
+        disabled={!hasOthers}
         style={{
           display: 'inline-flex', alignItems: 'center', gap: 4,
-          background: '#f0f0f0', border: 'none', borderRadius: 10,
+          background: '#eaf3ff', color: '#0a4b80',
-          padding: '2px 8px', fontSize: 11, cursor: 'pointer'
+          border: '1px solid #cfe0f5', borderRadius: 10,
+          padding: '2px 8px', fontSize: 11, cursor: hasOthers ? 'pointer' : 'default'
         }}
       >
         <span style={{ width: 6, height: 6, borderRadius: '50%', background: current.color ?? '#bbb', display: 'inline-block' }} />
-        {current.name}
+        📓 {current.name}
+        {hasOthers && <span style={{ fontSize: 9, opacity: 0.6 }}>▾</span>}
       </button>
-      {open && (
+      {open && hasOthers && (
         <div
           style={{
             position: 'absolute', top: '100%', left: 0,
             background: '#fff', border: '1px solid #ccc', borderRadius: 4,
-            zIndex: 50, minWidth: 120, boxShadow: '0 2px 6px rgba(0,0,0,0.15)'
+            zIndex: 50, minWidth: 140, boxShadow: '0 2px 6px rgba(0,0,0,0.15)',
+            marginTop: 2
           }}
         >
-          {notebooks.filter((nb) => nb.id !== current.id).map((nb) => (
+          <div style={{ fontSize: 10, color: '#888', padding: '4px 10px', borderBottom: '1px solid #eee' }}>
+            이동할 노트북
+          </div>
+          {others.map((nb) => (
             <button
               key={nb.id}
               onClick={async () => { await onMove(nb.id); setOpen(false); }}

src/renderer/inbox/store.ts

@@ -129,7 +129,7 @@ export const useInbox = create<InboxState>((set, get) => ({
   reviewData: null,
   notebooks: [],
   selectedNotebookId: null,
-  sidebarVisible: false,
+  sidebarVisible: true,
   sidebarWidth: 240,
   promotionCandidates: [],
   async loadInitial() {
@@ -156,7 +156,7 @@ export const useInbox = create<InboxState>((set, get) => ({
         notes, continuity, pendingCount, ollamaStatus, todayCount, trashCount, expiredCandidates,
         failedCount, recallCandidate, counts,
         ai_enabled: settings.ai_enabled ?? true,
-        sidebarVisible: settings.sidebar_visible ?? false,
+        sidebarVisible: settings.sidebar_visible ?? true,
         sidebarWidth: settings.sidebar_width ?? 240,
         loading: false
       });

tests/unit/App.test.tsx

@@ -166,9 +166,11 @@ describe('App header — 3 tabs (v0.4)', () => {
   });
 
   it('Cmd+B 키 이벤트가 toggleSidebar 호출', async () => {
-    const initialVisible = useInbox.getState().sidebarVisible;
+    // loadInitial 의 getSettings hydrate 후 state 가 정해진 시점 기준으로 토글 검증.
+    vi.mocked(inboxApi.getSettings).mockResolvedValue({ onboarding_completed: true, sidebar_visible: false });
     render(<App />);
     await screen.findByRole('tab', { name: /Inbox/ });
+    const initialVisible = useInbox.getState().sidebarVisible;
     // jsdom 에서 navigator.platform = '' → isMac=false → ctrlKey 로 판단.
     window.dispatchEvent(new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true }));
     // toggleSidebar 가 호출되면 sidebarVisible 이 반전됨.

tests/unit/NoteCard.test.tsx

@@ -224,7 +224,8 @@ describe('NoteCard — notebook chip (Task 17)', () => {
     fireEvent.click(screen.getByTitle('다른 노트북으로 이동'));
     // 현재 nb-1('회사') 는 제외, nb-2('개인') 만 보임.
     expect(screen.getByText('개인')).toBeInTheDocument();
-    expect(screen.queryAllByText('회사').length).toBe(1); // chip 버튼 안에만 존재
+    // chip 자체 text 는 "📓 회사 ▾" 이라 정확 매칭 X → regex 로 chip 안에만 '회사' 존재 확인.
+    expect(screen.queryAllByText(/회사/).length).toBe(1);
   });
 
   it('dropdown 의 notebook 클릭 → store.moveNoteToNotebook 호출', async () => {