release: v0.3.13 — MeToast 集成与全面质量修复

- 集成 MetonaToast v2.0.0 替换自研 Toast 组件（右上角、进度条、自动关闭、主题联动）
- 修复 sidebar resize 未持久化到 IndexedDB
- 修复 Ctrl+Tab MRU 切换逻辑与文档不一致
- 完善 WYSIWYG 模式标签切换选区恢复
- 清理死代码（useActiveHeading observerRef、旧 Toast 样式、重复滚动条样式、SearchReplace 重复检查）
- 同步 DESIGN.md / docs 文档（CodeMirror→Milkdown、stores 计数、editorStore 字段）
- 新增 .npmrc.example 模板
- 更新关于对话框与文档远程地址为 Gitea
- 版本号 0.3.12 → 0.3.13

src/renderer/hooks/useFileOperations.ts

@@ -3,13 +3,13 @@ import { useTabStore } from '../stores/tabStore'
 import { useEditorStore } from '../stores/editorStore'
 import { recentFilesRepository } from '../db/recentFilesRepository'
 import { logError } from '../lib/errorHandler'
-import type { ToastType } from '../components/Toast/Toast'
+import { showToast } from '../lib/toast'
 
 /**
  * AR-01: 从 App.tsx 提取的文件操作逻辑
  * UX-02: 添加 loading 状态指示
  */
-export function useFileOperations(showToast: (msg: string, type?: ToastType) => void) {
+export function useFileOperations() {
   const createTab = useTabStore(s => s.createTab)
   const getActiveTab = useTabStore(s => s.getActiveTab)
   const setLoading = useEditorStore(s => s.setLoading)
@@ -30,7 +30,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
     } finally {
       setLoading('file-open', false)
     }
-  }, [createTab, showToast, setLoading])
+  }, [createTab, setLoading])
 
   const handleSave = useCallback(async (): Promise<void> => {
     try {
@@ -48,7 +48,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
       logError('保存文件失败', error)
       showToast('保存失败', 'error')
     }
-  }, [getActiveTab, showToast])
+  }, [getActiveTab])
 
   const handleSaveAs = useCallback(async (): Promise<void> => {
     try {
@@ -63,7 +63,7 @@ export function useFileOperations(showToast: (msg: string, type?: ToastType) =>
       logError('另存为失败', error)
       showToast('另存为失败', 'error')
     }
-  }, [getActiveTab, showToast])
+  }, [getActiveTab])
 
   const handleOpenRecent = useCallback(async (filePath: string): Promise<void> => {
     if (!window.electronAPI) return