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/components/dashboard/Dashboard.tsx

@@ -158,6 +158,11 @@ export function Dashboard() {
           avgCpu={Number(serverStats?.avg_cpu ?? 0)}
           avgMemory={Number(serverStats?.avg_memory ?? 0)}
           avgDisk={Number(serverStats?.avg_disk ?? 0)}
+          totalCpu={Number(serverStats?.total_cpu ?? 0)}
+          totalMemory={Number(serverStats?.total_memory ?? 0)}
+          usedMemory={Number(serverStats?.used_memory ?? 0)}
+          totalDisk={Number(serverStats?.total_disk ?? 0)}
+          usedDisk={Number(serverStats?.used_disk ?? 0)}
           metrics={metrics}
         />
       </div>

frontend/src/components/dashboard/DashboardCharts.tsx

@@ -280,11 +280,21 @@ export function ResourceUsageCard({
   avgCpu,
   avgMemory,
   avgDisk,
+  totalCpu,
+  totalMemory,
+  usedMemory,
+  totalDisk,
+  usedDisk,
   metrics,
 }: {
   avgCpu: number;
   avgMemory: number;
   avgDisk: number;
+  totalCpu: number;
+  totalMemory: number;
+  usedMemory: number;
+  totalDisk: number;
+  usedDisk: number;
   metrics?: JsonData[];
 }) {
   const realData = buildMetricsFromReal(metrics ?? [], avgDisk);
@@ -314,6 +324,24 @@ export function ResourceUsageCard({
             </Badge>
           </div>
         </div>
+        {/* 总资源概览：在百分比趋势旁补充具体容量，避免“只看到百分比” // Logan.Li */}
+        <div className="mt-3 flex flex-wrap items-center gap-3 text-xs">
+          <div className="flex items-center gap-1.5 px-2.5 py-1.5 rounded-md bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
+            <Cpu className="h-3.5 w-3.5 text-[var(--dg-blue)]" />
+            <span className="text-[var(--dg-text-secondary)]">CPU</span>
+            <span className="font-medium text-[var(--dg-text-primary)]">{totalCpu} 核</span>
+          </div>
+          <div className="flex items-center gap-1.5 px-2.5 py-1.5 rounded-md bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
+            <MemoryStick className="h-3.5 w-3.5 text-[var(--dg-green)]" />
+            <span className="text-[var(--dg-text-secondary)]">内存</span>
+            <span className="font-medium text-[var(--dg-text-primary)]">{usedMemory} / {totalMemory} GB</span>
+          </div>
+          <div className="flex items-center gap-1.5 px-2.5 py-1.5 rounded-md bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
+            <HardDrive className="h-3.5 w-3.5 text-[var(--dg-purple)]" />
+            <span className="text-[var(--dg-text-secondary)]">磁盘</span>
+            <span className="font-medium text-[var(--dg-text-primary)]">{usedDisk} / {totalDisk} GB</span>
+          </div>
+        </div>
       </CardHeader>
       <CardContent>
         <div className="h-[280px]">