fix: e2e 类型声明 + ESLint 覆盖 e2e + backup 路径校验 + DX 脚本

- e2e/global.d.ts: Window.__TAURI_INTERNALS__ 类型声明
- e2e search-clean: 未使用参数 _args 前缀
- tsconfig.test.json: include e2e/
- CI: ESLint 扫描范围扩展到 e2e/
- backup_registry: 拒绝写入系统目录 (C:\Windows\, C:\Program Files\)
- package.json: 新增 lint:fix / format 脚本

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

e2e/global.d.ts

@@ -0,0 +1,5 @@
+interface Window {
+  __TAURI_INTERNALS__?: {
+    invoke: (cmd: string, args?: Record<string, unknown>) => Promise<unknown>;
+  };
+}