重构：Wails升级/mermaid主题切换/代码高亮修复/文件系统UI重构

- Wails v2.12.0升级（App绑定新增API、runtime类型扩展）
- 修复mermaid暗色主题切换渲染失败（SVG textContent污染→data-mermaid-src保存源码）
- 修复代码高亮全语言失效（languageMap静态白名单替代运行时hljs检查）
- 文件系统：FileListPanel重写、FileItemRow合并删除、Toolbar简化
- 新增剪贴板图片粘贴（Ctrl+V粘贴图片到当前目录）
- 死代码清理：DeviceTest/errorHandler/useLocalStorage移除
- MarkdownEditor优化、theme store增强、CodeMirror加载器精简

web/package-lock.json

@@ -28,8 +28,6 @@
         "@codemirror/state": "^6.5.3",
         "@codemirror/theme-one-dark": "^6.1.3",
         "@codemirror/view": "^6.39.8",
-        "@types/highlight.js": "^9.12.4",
-        "@types/mermaid": "^9.1.0",
         "highlight.js": "^11.11.1",
         "mammoth": "^1.11.0",
         "marked": "^17.0.1",
@@ -39,6 +37,8 @@
         "xlsx": "^0.18.5"
       },
       "devDependencies": {
+        "@types/highlight.js": "^9.12.4",
+        "@types/mermaid": "^9.1.0",
         "@vitejs/plugin-vue": "^6.0.3",
         "unplugin-auto-import": "^0.18.3",
         "unplugin-vue-components": "^0.27.4",
@@ -1440,12 +1440,14 @@
       "version": "9.12.4",
       "resolved": "https://registry.npmmirror.com/@types/highlight.js/-/highlight.js-9.12.4.tgz",
       "integrity": "sha512-t2szdkwmg2JJyuCM20e8kR2X59WCE5Zkl4bzm1u1Oukjm79zpbiAv+QjnwLnuuV0WHEcX2NgUItu0pAMKuOPww==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/@types/mermaid": {
       "version": "9.1.0",
       "resolved": "https://registry.npmmirror.com/@types/mermaid/-/mermaid-9.1.0.tgz",
       "integrity": "sha512-rc8QqhveKAY7PouzY/p8ljS+eBSNCv7o79L97RSub/Ic2SQ34ph1Ng3s8wFLWVjvaEt6RLOWtSCsgYWd95NY8A==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/@types/trusted-types": {