fix(frontend): 调整工作台文件总览与快捷指令菜单

将文件管理区从单目录文件表格修正为多根目录常驻的文件夹总览，
点击目录时仅展开和聚焦，不再切换为单独目录列表。

同时修复快捷指令右键菜单的透明背景与粘贴语义，
统一为“粘贴到命令输入框”且不自动发送，并同步多语言文案。

顺带收紧快捷指令编辑弹窗的最小尺寸、初始尺寸与视口上限，
降低小分辨率下的弹窗溢出概率。

packages/frontend/src/locales/en-US.json

@@ -1434,16 +1434,14 @@
     },
     "actions": {
       "runNow": "Run Now",
-      "pasteToTerminal": "Paste to Terminal",
+      "pasteToCommandInput": "Paste to Command Input",
       "copyCommand": "Copy Command",
-      "pasteToQuickInput": "Paste to Quick Input",
       "edit": "Edit",
       "delete": "Delete",
       "sendToAllSessions": "Send to All Servers"
     },
     "notifications": {
-      "pastedToTerminal": "Pasted into the terminal input.",
-      "pastedToQuickInput": "Pasted into the quick input.",
+      "pastedToCommandInput": "Pasted into the command input.",
       "sentToAllSessions": "Command sent to {count} servers.",
       "noActiveSshSessions": "No active SSH sessions to send command to."
     }