feat: Agent CLI 与终端审计回放全面优化

- Agent CLI: 多轮对话、SSH 长连接、流式推理、Evolver 按用户隔离、历史侧栏
- 终端审计: 回放播放器、命令书签、筛选分页导出、命令输出统计、录制落盘修复
- 修复 session_commands 表迁移、Kill 竞态导致录制丢失、无录制会话回放提示
- 审计历史页只读（移除删除），移除回放弹框录制搜索

frontend/src/locales/en-US.json

@@ -620,6 +620,7 @@
       "noHistory": "No history sessions",
       "noCommands": "No command records",
       "totalCommands": "{{count}} commands",
+      "showingLoaded": "{{loaded}} loaded",
       "virtualScroll": "virtual scroll",
       "autoRefresh": "Auto Refresh",
       "autoRefreshHintOn": "Auto-refresh every {{sec}}s · click to disable",
@@ -630,6 +631,40 @@
       "liveMonitor": "Live Monitor",
       "replay": "Replay",
       "downloadRecord": "Download Recording",
+      "replayAtCommand": "Replay from command",
+      "filterUsername": "Username",
+      "presetToday": "Today",
+      "preset7d": "Last 7 days",
+      "preset30d": "Last 30 days",
+      "hasRecordOnly": "With recording only",
+      "applyFilter": "Filter",
+      "totalSessions": "{{count}} sessions",
+      "deleteTitle": "Delete Session",
+      "deleteConfirm": "Delete session #{{id}}? Recording will be removed.",
+      "deleted": "Deleted",
+      "deleteFailed": "Delete failed",
+      "batchDelete": "Batch delete",
+      "batchDeleteConfirm": "Delete {{count}} selected sessions?",
+      "batchDeleted": "Batch deleted",
+      "exportFailed": "Export failed",
+      "exportReport": "Export report",
+      "exportReportCsv": "Export CSV",
+      "exportCommands": "Export commands",
+      "exportCommandsCsv": "Export commands CSV",
+      "replayPlayer": {
+        "title": "Terminal Replay #{{id}}",
+        "desc": "Replay recorded terminal session",
+        "noRecord": "No recording data for this session",
+        "loadFailed": "Failed to load recording",
+        "legacyFormat": "Legacy format — static display only",
+        "commands": "Command bookmarks",
+        "searchCommand": "Search commands...",
+        "noCommands": "No commands recorded",
+        "toStart": "Jump to start",
+        "toEnd": "Jump to end",
+        "restart": "Restart playback",
+        "clientIp": "Client IP"
+      },
       "tab": {
         "active": "Active Sessions",
         "history": "History Sessions",
@@ -647,7 +682,8 @@
         "actions": "Actions",
         "command": "Command",
         "outputSize": "Output Size",
-        "sessionRef": "Session"
+        "sessionRef": "Session",
+        "recordSize": "Recording Size"
       },
       "status": {
         "active": "Active",

frontend/src/locales/zh-CN.json

@@ -620,6 +620,7 @@
       "noHistory": "暂无历史会话",
       "noCommands": "暂无会话命令记录",
       "totalCommands": "共 {{count}} 条命令",
+      "showingLoaded": "已加载 {{loaded}} 条",
       "virtualScroll": "虚拟滚动渲染",
       "autoRefresh": "自动刷新",
       "autoRefreshHintOn": "每 {{sec}}s 自动刷新 · 点击关闭",
@@ -630,6 +631,40 @@
       "liveMonitor": "实时查看",
       "replay": "回放",
       "downloadRecord": "下载录制",
+      "replayAtCommand": "从此命令回放",
+      "filterUsername": "用户名",
+      "presetToday": "今天",
+      "preset7d": "近7天",
+      "preset30d": "近30天",
+      "hasRecordOnly": "仅有录制",
+      "applyFilter": "筛选",
+      "totalSessions": "共 {{count}} 条会话",
+      "deleteTitle": "删除会话",
+      "deleteConfirm": "确认删除会话 #{{id}}？录制文件将一并删除。",
+      "deleted": "已删除",
+      "deleteFailed": "删除失败",
+      "batchDelete": "批量删除",
+      "batchDeleteConfirm": "确认删除选中的 {{count}} 条会话记录？",
+      "batchDeleted": "已批量删除",
+      "exportFailed": "导出失败",
+      "exportReport": "导出报告",
+      "exportReportCsv": "导出 CSV",
+      "exportCommands": "导出命令",
+      "exportCommandsCsv": "导出命令 CSV",
+      "replayPlayer": {
+        "title": "终端回放 #{{id}}",
+        "desc": "回放录制的终端会话",
+        "noRecord": "该会话无录制数据",
+        "loadFailed": "加载录制失败",
+        "legacyFormat": "旧版录制格式，仅支持静态展示",
+        "commands": "命令书签",
+        "searchCommand": "搜索命令...",
+        "noCommands": "无命令记录",
+        "toStart": "跳到开头",
+        "toEnd": "跳到结尾",
+        "restart": "重新播放",
+        "clientIp": "客户端 IP"
+      },
       "tab": {
         "active": "在线会话",
         "history": "历史会话",
@@ -647,7 +682,8 @@
         "actions": "操作",
         "command": "命令",
         "outputSize": "输出大小",
-        "sessionRef": "关联会话"
+        "sessionRef": "关联会话",
+        "recordSize": "录制大小"
       },
       "status": {
         "active": "活动中",