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/renderer/stores/useSettingsStore.ts

@@ -0,0 +1,33 @@
+import { create } from 'zustand'
+import type { ThemeId, Language, GlobalSettings, ActionId } from '@shared/types'
+import { ipcCall } from '@renderer/lib/ipc-client'
+import { applyTheme } from '@renderer/lib/theme'
+import i18n from '@renderer/i18n'
+
+interface SettingsState extends GlobalSettings {
+  loaded: boolean
+  load: () => Promise<void>
+  update: (partial: Partial<GlobalSettings>) => Promise<void>
+}
+
+export const useSettingsStore = create<SettingsState>((set, get) => ({
+  penName: '未命名作者',
+  onboardingCompleted: false,
+  theme: 'default',
+  language: 'zh-CN',
+  dailyWordGoal: 0,
+  shortcuts: {} as Record<ActionId, string>,
+  loaded: false,
+  load: async () => {
+    const data = await ipcCall(() => window.electronAPI.settings.get())
+    set({ ...data, loaded: true })
+    applyTheme(data.theme)
+    await i18n.changeLanguage(data.language)
+  },
+  update: async (partial) => {
+    const data = await ipcCall(() => window.electronAPI.settings.update(partial))
+    set({ ...get(), ...data })
+    if (partial.theme) applyTheme(data.theme)
+    if (partial.language) await i18n.changeLanguage(data.language)
+  }
+}))