feat: 添加文件搜索框

packages/frontend/src/locales/en.json

@@ -326,7 +326,8 @@
     "noActiveSession": "No active session",
     "loadDirectoryFailed": "Failed to load directory",
     "noOpenFile": "No file open",
-    "selectFileToEdit": "Select a file from the file manager to start editing."
+    "selectFileToEdit": "Select a file from the file manager to start editing.",
+    "searchPlaceholder": "Search files..."
   },
   "statusMonitor": {
       "noActiveSession": "No active session"

packages/frontend/src/locales/zh.json

@@ -331,7 +331,8 @@
     "editPathTooltip": "点击路径进行编辑",
     "noActiveSession": "无活动会话",
     "noOpenFile": "未打开文件",
-    "selectFileToEdit": "请从文件管理器中选择文件以开始编辑。"
+    "selectFileToEdit": "请从文件管理器中选择文件以开始编辑。",
+    "searchPlaceholder": "搜索文件..."
   },
   "statusMonitor": {
       "noActiveSession": "无活动会话"