添加Claude和Codex环境变量检查 (#242)

* feat(env): add environment variable conflict detection and management

实现了系统环境变量冲突检测与管理功能:

核心功能:
- 自动检测会影响 Claude/Codex 的系统环境变量
- 支持 Windows 注册表和 Unix shell 配置文件检测
- 提供可视化的环境变量冲突警告横幅
- 支持批量选择和删除环境变量
- 删除前自动备份,支持后续恢复

技术实现:
- Rust 后端: 跨平台环境变量检测与管理
- React 前端: EnvWarningBanner 组件交互界面
- 国际化支持: 中英文界面
- 类型安全: 完整的 TypeScript 类型定义

* refactor(env): remove unused imports and function

Remove unused HashMap and PathBuf imports, and delete the unused get_source_description function to clean up the code.

src/i18n/locales/en.json

@@ -608,6 +608,43 @@
       "deleteMessage": "Are you sure you want to delete prompt \"{{name}}\"?"
     }
   },
+  "env": {
+    "warning": {
+      "title": "Environment Variable Conflicts Detected",
+      "description": "Found {{count}} environment variables that may override your configuration"
+    },
+    "actions": {
+      "expand": "View Details",
+      "collapse": "Collapse",
+      "selectAll": "Select All",
+      "clearSelection": "Clear Selection",
+      "deleteSelected": "Delete Selected ({{count}})",
+      "deleting": "Deleting..."
+    },
+    "field": {
+      "value": "Value",
+      "source": "Source"
+    },
+    "source": {
+      "userRegistry": "User Environment Variable (Registry)",
+      "systemRegistry": "System Environment Variable (Registry)",
+      "systemEnv": "System Environment Variable"
+    },
+    "delete": {
+      "success": "Environment variables deleted successfully",
+      "error": "Failed to delete environment variables"
+    },
+    "backup": {
+      "location": "Backup location: {{path}}"
+    },
+    "confirm": {
+      "title": "Confirm Delete Environment Variables",
+      "message": "Are you sure you want to delete {{count}} environment variable(s)?",
+      "backupNotice": "A backup will be created automatically before deletion. You can restore it later. Changes take effect after restarting the application or terminal.",
+      "confirm": "Confirm Delete"
+    },
+    "error": {
+      "noSelection": "Please select environment variables to delete"
   "skills": {
     "manage": "Skills",
     "title": "Claude Skills Management",