feat(frontend): 新增全局服务器快捷检索并优化工作台

新增 Ctrl+Shift+F 全局服务器检索面板，支持对 SSH、
RDP、VNC 连接进行本地模糊搜索、键盘导航与直接连接，
并统一复用现有 sessionStore 连接链路

同时将 Workbench 导航从左侧竖排 icon rail 调整为标题上方
横向纯图标栏，并补充终端标签页“关闭全部”菜单项

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

@@ -1632,9 +1632,20 @@
     "serverEntryTitle": "{name} · {count} terminals",
     "terminalCount": "{count} terminals"
   },
+  "globalConnectionSearch": {
+    "shortcut": "Ctrl+Shift+F",
+    "title": "Global Server Search",
+    "placeholder": "Search by name, host, username, or type...",
+    "loading": "Loading connections...",
+    "emptyHint": "Type any keyword to fuzzy-search servers, or pick a recent connection directly.",
+    "noResults": "No servers matched “{query}”.",
+    "footerHint": "Quick connect for SSH / RDP / VNC",
+    "footerActions": "↑↓ Navigate · Enter Connect · Esc Close"
+  },
   "tabs": {
     "contextMenu": {
       "close": "Close Tab",
+      "closeAll": "Close All Tabs",
       "closeOthers": "Close Other Tabs",
       "closeRight": "Close Tabs to the Right",
       "closeLeft": "Close Tabs to the Left",

packages/frontend/src/locales/ja-JP.json

@@ -1590,6 +1590,16 @@
           "openConnectionPickerTooltip": "別のサーバーを選択",
           "terminalBadge": "端末 {index}"
       },
+      "globalConnectionSearch": {
+        "shortcut": "Ctrl+Shift+F",
+        "title": "グローバルサーバー検索",
+        "placeholder": "名前、ホスト、ユーザー名、種類で検索...",
+        "loading": "接続一覧を読み込み中...",
+        "emptyHint": "キーワードを入力してサーバーをあいまい検索するか、最近の接続を直接選択してください。",
+        "noResults": "「{query}」に一致するサーバーはありません。",
+        "footerHint": "SSH / RDP / VNC をすばやく接続",
+        "footerActions": "↑↓ 移動 · Enter 接続 · Esc 閉じる"
+      },
       "tabs": {
         "contextMenu": {
           "close": "タブを閉じる",

packages/frontend/src/locales/zh-CN.json

@@ -1636,9 +1636,20 @@
     "serverEntryTitle": "{name} · {count} 个终端",
     "terminalCount": "{count} 个终端"
   },
+  "globalConnectionSearch": {
+    "shortcut": "Ctrl+Shift+F",
+    "title": "全局服务器检索",
+    "placeholder": "输入名称、主机、用户名或类型...",
+    "loading": "正在加载连接列表...",
+    "emptyHint": "输入任意关键词开始模糊检索服务器，或直接选择最近连接。",
+    "noResults": "没有找到与 “{query}” 匹配的服务器。",
+    "footerHint": "支持 SSH / RDP / VNC 全类型快速连接",
+    "footerActions": "↑↓ 切换 · Enter 连接 · Esc 关闭"
+  },
   "tabs": {
     "contextMenu": {
       "close": "关闭标签页",
+      "closeAll": "关闭全部标签页",
       "closeOthers": "关闭其他标签页",
       "closeRight": "关闭右侧标签页",
       "closeLeft": "关闭左侧标签页",