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/kubernetes/NamespaceOverviewPage.tsx

@@ -65,22 +65,22 @@ export default function NamespaceOverviewPage() {
   return (
     <div className="space-y-4">
       {/* Breadcrumb */}
-      <div className="flex items-center gap-2 text-sm text-slate-500">
-        <Link to="/kubernetes" className="hover:text-slate-300 transition-colors">集群</Link>
+      <div className="flex items-center gap-2 text-sm text-[var(--dg-text-muted)]">
+        <Link to="/kubernetes" className="hover:text-[var(--dg-text-primary)] transition-colors">集群</Link>
         <ChevronRight className="h-3 w-3" />
-        <Link to={`/kubernetes/${clusterCode}`} className="hover:text-slate-300 transition-colors">{clusterCode}</Link>
+        <Link to={`/kubernetes/${clusterCode}`} className="hover:text-[var(--dg-text-primary)] transition-colors">{clusterCode}</Link>
         <ChevronRight className="h-3 w-3" />
-        <span className="text-slate-300">{namespace}</span>
+        <span className="text-[var(--dg-text-primary)]">{namespace}</span>
       </div>
 
       {/* Header */}
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-2xl font-bold text-slate-100 flex items-center gap-2">
-            <Cloud className="h-6 w-6 text-blue-400" />
+          <h1 className="text-2xl font-bold text-[var(--dg-text-primary)] flex items-center gap-2">
+            <Cloud className="h-6 w-6 text-[var(--dg-blue)]" />
             {namespace}
           </h1>
-          <p className="text-sm text-slate-500 mt-1">命名空间概览</p>
+          <p className="text-sm text-[var(--dg-text-muted)] mt-1">命名空间概览</p>
         </div>
       </div>
 
@@ -89,15 +89,15 @@ export default function NamespaceOverviewPage() {
         {RESOURCE_LINKS.map((r) => (
           <Link key={r.type}
             to={`/kubernetes/${clusterCode}/namespace/${namespace}/${r.type}`}
-            className="bg-slate-900 border border-slate-800 rounded-lg p-4 hover:border-slate-600 hover:bg-slate-800/50 transition-all group"
+            className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-lg p-4 hover:border-[var(--dg-border-hover)] hover:bg-[var(--dg-bg-tertiary)]/50 transition-all group"
           >
             <div className="flex items-center justify-between mb-2">
-              <r.icon className="h-5 w-5 text-slate-500 group-hover:text-blue-400 transition-colors" />
-              <ChevronRight className="h-4 w-4 text-slate-600 group-hover:text-slate-400 transition-colors" />
+              <r.icon className="h-5 w-5 text-[var(--dg-text-muted)] group-hover:text-[var(--dg-blue)] transition-colors" />
+              <ChevronRight className="h-4 w-4 text-[var(--dg-text-muted)] group-hover:text-[var(--dg-text-secondary)] transition-colors" />
             </div>
-            <div className="text-lg font-bold text-slate-100">{loading ? '-' : (counts[r.type] ?? 0)}</div>
-            <div className="text-sm text-slate-500">{r.label}</div>
-            <div className="text-xs text-slate-600 mt-1">{r.desc}</div>
+            <div className="text-lg font-bold text-[var(--dg-text-primary)]">{loading ? '-' : (counts[r.type] ?? 0)}</div>
+            <div className="text-sm text-[var(--dg-text-muted)]">{r.label}</div>
+            <div className="text-xs text-[var(--dg-text-muted)] mt-1">{r.desc}</div>
           </Link>
         ))}
       </div>