feat: 实现笔临 P0/P1 Electron 桌面应用 v0.1.0

交付写作核心（TipTap、自动保存、分卷分章）、Onboarding、7 主题与双语 i18n、快捷键设置；主进程使用 node:sqlite；补全 Vitest 与 Playwright E2E；统一 design/ 目录并移除 desigin 拼写错误路径。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/shared/default-shortcuts.ts

@@ -0,0 +1,15 @@
+import type { ActionId } from './types'
+
+export const DEFAULT_SHORTCUTS: Record<ActionId, string> = {
+  saveChapter: 'CommandOrControl+S',
+  newChapter: 'CommandOrControl+Shift+N',
+  focusMode: 'CommandOrControl+Alt+F',
+  globalSearch: 'CommandOrControl+Shift+F',
+  closeTab: 'CommandOrControl+W',
+  openReference: 'CommandOrControl+Shift+P',
+  insertLandmark: 'CommandOrControl+Shift+M',
+  openLandmarks: 'CommandOrControl+Shift+L',
+  exportBook: 'CommandOrControl+Shift+E',
+  toggleTTS: 'CommandOrControl+Shift+R',
+  captureInspiration: 'CommandOrControl+Shift+I'
+}