fix(acceptance): 首轮 Windows 验收 7 项缺陷回修（docs/14）

P0 快捷键让行判定补 recoveryDismissed，点过「稍后再说」不再全失效；
P1 冲突重载加 force 绕过防竞态守卫；路径分隔符 joinPath 原生化 +
samePath 归一化比较；.source-cm 补文档字色；
P2 turndown 启用 GFM 插件（HTML 导入不再丢表格）；任务复选框去掉
click preventDefault（浏览器激活撤销覆盖视觉同步）；
P3 新增 syncEditorContent：干净标签的挂载/卸载序列化回写同步基线，
切标签不再误标未保存。vitest 74 通过 + 2 跳过。

package.json

@@ -1,40 +1,41 @@
 {
   "dependencies": {
-    "@milkdown/kit": "7.23.0",
-    "@tauri-apps/api": "^2.12.4",
-    "@tauri-apps/plugin-dialog": "^2.2.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
-    "codemirror": "6.0.2",
     "@codemirror/lang-markdown": "6.5.2",
     "@codemirror/language-data": "6.5.2",
     "@codemirror/theme-one-dark": "6.1.3",
+    "@milkdown/kit": "7.23.0",
     "@milkdown/plugin-math": "7.5.9",
+    "@tauri-apps/api": "^2.12.4",
+    "@tauri-apps/plugin-dialog": "^2.2.0",
+    "codemirror": "6.0.2",
     "katex": "0.16.11",
+    "mammoth": "1.11.0",
     "mermaid": "12.3.0",
-    "unified": "11.0.5",
-    "remark-parse": "11.0.0",
+    "react": "18.3.1",
+    "react-dom": "18.3.1",
+    "rehype-katex": "7.0.1",
+    "rehype-stringify": "10.0.1",
     "remark-gfm": "4.0.1",
     "remark-math": "6.0.0",
+    "remark-parse": "11.0.0",
     "remark-rehype": "11.1.2",
-    "rehype-stringify": "10.0.1",
-    "rehype-katex": "7.0.1",
-    "unist-util-visit": "5.1.0",
     "shiki": "4.6.0",
     "turndown": "7.2.2",
-    "mammoth": "1.11.0"
+    "turndown-plugin-gfm": "^1.0.2",
+    "unified": "11.0.5",
+    "unist-util-visit": "5.1.0"
   },
   "devDependencies": {
     "@tauri-apps/cli": "^2.2.0",
+    "@types/hast": "3.0.5",
     "@types/react": "18.3.11",
     "@types/react-dom": "18.3.1",
+    "@types/turndown": "5.0.6",
     "@vitejs/plugin-react": "4.3.3",
     "jsdom": "25.0.1",
     "typescript": "5.6.3",
     "vite": "5.4.11",
-    "vitest": "2.1.5",
-    "@types/turndown": "5.0.6",
-    "@types/hast": "3.0.5"
+    "vitest": "2.1.5"
   },
   "name": "new-markdown",
   "private": true,
@@ -47,4 +48,4 @@
   },
   "type": "module",
   "version": "0.1.0"
-}
+}