feat(frontend): 增强工作台快捷指令与仪表盘能力

补充快捷指令动态变量解析与编辑弹窗一键插入，
统一列表执行、粘贴到终端和批量发送的处理链路

扩展快捷命令右键菜单动作，并为文件面板新增
多根目录资源管理器式侧栏浏览体验

为首页 dashboard 增加当前用户与系统总览双视角的
实时会话指标展示，并同步更新相关知识库记录

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

@@ -389,8 +389,6 @@
     "scopeSearchMode": "命中路径已自动展开",
     "scopeTreeNoMatch": "没有匹配的树节点",
     "scopeDragPlaceholder": "拖拽排序预留中，当前仅展示目标占位反馈。",
-    "scopePinAction": "定位到此范围",
-    "scopeDragAction": "拖拽重排（预留）",
     "untaggedGroup": "未标记",
     "noUntaggedConnections": "没有未标记的连接。"
   },
@@ -1383,16 +1381,73 @@
       "addVariable": "+ 添加变量",
       "execute": "执行",
       "warningUndefinedVariables": "警告：指令模板中存在未定义的变量: {variables}",
-      "errorNoActiveSession": "没有活动的SSH会话可执行指令。"
+      "errorNoActiveSession": "没有活动的SSH会话可执行指令。",
+      "dynamicVariables": {
+        "title": "动态变量",
+        "description": "点击下方变量即可插入到指令中，执行时会自动填充。",
+        "exampleLabel": "示例",
+        "groups": {
+          "datetime": "日期时间",
+          "identity": "唯一标识",
+          "system": "系统"
+        },
+        "items": {
+          "date": {
+            "label": "date",
+            "description": "当前日期，支持自定义格式，例如 YYYY-MM-DD、YYYYMMDD、MM/DD。"
+          },
+          "time": {
+            "label": "time",
+            "description": "当前时间，支持自定义格式，例如 HH:mm:ss、HHmmss、HH:mm。"
+          },
+          "timestamp": {
+            "label": "timestamp",
+            "description": "Unix 时间戳（秒）。"
+          },
+          "week": {
+            "label": "week",
+            "description": "当前是一年中的第几周。"
+          },
+          "uuid": {
+            "label": "uuid",
+            "description": "生成唯一标识符。"
+          },
+          "random": {
+            "label": "random",
+            "description": "生成随机字符串，可通过 random:8 这类写法指定长度。"
+          },
+          "clipboard": {
+            "label": "clipboard",
+            "description": "读取当前剪贴板文本内容。"
+          },
+          "password": {
+            "label": "password",
+            "description": "尝试读取当前活动 SSH 会话对应的登录密码。"
+          }
+        },
+        "warnings": {
+          "clipboardUnavailable": "无法读取剪贴板内容，已按空文本处理。",
+          "passwordUnavailable": "当前活动连接没有可用的登录密码，已按空文本处理。",
+          "unknownVariable": "存在未识别的动态变量: {variable}"
+        }
+      }
     },
     "untagged": "未标记",
     "tags": {
       "clickToEditTag": "点击编辑标签名称"
     },
     "actions": {
+      "runNow": "立即执行",
+      "pasteToTerminal": "粘贴到终端",
+      "copyCommand": "复制命令",
+      "pasteToQuickInput": "粘贴到快捷输入框",
+      "edit": "编辑",
+      "delete": "删除",
       "sendToAllSessions": "发送到全部服务器"
     },
     "notifications": {
+      "pastedToTerminal": "已粘贴到终端输入框。",
+      "pastedToQuickInput": "已粘贴到快捷输入框。",
       "sentToAllSessions": "指令已发送到 {count} 台服务器。",
       "noActiveSshSessions": "没有活动的 SSH 会话可发送指令。"
     }
@@ -1523,6 +1578,23 @@
       "sshSuccess24h": "最近 24 小时内成功建立的 SSH 连接事件",
       "sshFailure24h": "最近 24 小时内 SSH 连接或 Shell 打开失败事件"
     },
+    "liveMetrics": {
+      "title": "实时会话指标",
+      "description": "同时展示当前用户视角与系统总览视角的运行态会话信息。",
+      "currentUser": {
+        "title": "我的会话",
+        "description": "与当前登录用户绑定的在线和挂起会话。"
+      },
+      "system": {
+        "title": "系统总览",
+        "description": "后端当前正在追踪的全局实时会话信号。"
+      },
+      "labels": {
+        "activeSshSessions": "在线 SSH 会话",
+        "suspendedSessions": "挂起会话",
+        "statusStreams": "状态监控流"
+      }
+    },
     "charts": {
       "activityTrend7d": "近 7 天活动趋势",
       "activityTrendHint": "按天统计最近一周的审计事件量",