feat: PTY kubectl终端 + 侧边栏对齐修复 + 构建缓存清理

**kubectl WebShell 修复：**
- 引入 github.com/creack/pty 库实现真正的伪终端
- 替换 bash --noediting + TERM=dumb 方案为 PTY-backed bash
- 支持 xterm-256color、窗口自适应、readline 交互
- 修复键盘输入无响应问题

**侧边栏优化：**
- 独立菜单项高度从 py-1.5 改为 h-8，与父菜单对齐
- 独立菜单图标从 h-3 w-3 改为 h-3.5 w-3.5，统一 14px

**构建优化：**
- run.sh docker up 增加 docker image prune -f 清理悬空镜像
- 每次部署自动清理 builder cache + dangling images

**认证修复（历史）：**
- Token 存储：Zustand + localStorage 双写，http.ts 双源 fallback
- YamlViewer/DeploymentDetail token 来源统一为 Zustand store

frontend/src/components/kubernetes/YamlViewer.tsx

@@ -0,0 +1,119 @@
+import { useState, useEffect } from 'react';
+import { X, Copy, Check, Save, RefreshCw, Loader2 } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useToast } from '@/hooks/use-toast';
+import { kubernetesApi } from '@/services/api';
+import { useUserStore } from '@/store';
+
+interface YamlViewerProps {
+  clusterCode: string;
+  namespace: string;
+  resource: string;    // e.g. "deployments", "services"
+  name: string;
+  onClose: () => void;
+  onSaved?: () => void;
+}
+
+export function YamlViewer({ clusterCode, namespace, resource, name, onClose, onSaved }: YamlViewerProps) {
+  const { toast } = useToast();
+  const [yaml, setYaml] = useState('');
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [editing, setEditing] = useState(false);
+  const [copied, setCopied] = useState(false);
+
+  const loadYaml = async () => {
+    setLoading(true);
+    try {
+      const tk = useUserStore.getState().token || '';
+      const baseUrl = import.meta.env.VITE_API_BASE_URL || '';
+      const url = `${baseUrl}/api/v1/kubernetes/${clusterCode}/namespace/${namespace}/${resource}/${name}/yaml`;
+      const resp = await fetch(url, { headers: { Authorization: `Bearer ${tk}` } });
+      if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
+      const text = await resp.text();
+      setYaml(text);
+    } catch (e: any) {
+      toast({ title: '获取YAML失败', description: e.message, variant: 'destructive' });
+      setYaml(`# Error: ${e.message}`);
+    } finally { setLoading(false); }
+  };
+
+  const saveYaml = async () => {
+    setSaving(true);
+    try {
+      const tk = useUserStore.getState().token || '';
+      const baseUrl = import.meta.env.VITE_API_BASE_URL || '';
+      const url = `${baseUrl}/api/v1/kubernetes/${clusterCode}/namespace/${namespace}/${resource}/${name}/yaml`;
+      const resp = await fetch(url, {
+        method: 'PUT',
+        headers: { Authorization: `Bearer ${tk}`, 'Content-Type': 'application/yaml' },
+body: yaml,
+});
+if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
+toast({ title: 'YAML已应用', description: `${resource}/${name} 更新成功` });
+setEditing(false);
+onSaved?.();
+} catch (e: any) {
+toast({ title: '保存失败', description: e.message, variant: 'destructive' });
+} finally { setSaving(false); }
+};
+
+const copyYaml = async () => {
+await navigator.clipboard.writeText(yaml);
+setCopied(true);
+setTimeout(() => setCopied(false), 2000);
+};
+
+useEffect(() => { loadYaml(); }, []);
+
+return (
+<div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60" onClick={onClose}>
+<div className="bg-slate-900 border border-slate-700 rounded-xl w-[90vw] max-w-4xl max-h-[80vh] flex flex-col shadow-2xl" onClick={e => e.stopPropagation()}>
+{/* Header */}
+<div className="flex items-center justify-between p-4 border-b border-slate-700">
+<div>
+<h2 className="text-lg font-bold text-slate-100">{resource}/{name}</h2>
+<p className="text-xs text-slate-500">{namespace} · {clusterCode}</p>
+</div>
+<div className="flex items-center gap-2">
+<Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={copyYaml}>
+{copied ? <Check className="h-3 w-3 mr-1 text-emerald-400" /> : <Copy className="h-3 w-3 mr-1" />}
+{copied ? '已复制' : '复制'}
+</Button>
+{!editing ? (
+<Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={() => setEditing(true)}>
+编辑
+</Button>
+) : (
+<>
+<Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={() => { setEditing(false); loadYaml(); }}>
+取消
+</Button>
+<Button size="sm" className="h-8 bg-blue-600 hover:bg-blue-700" onClick={saveYaml} disabled={saving}>
+{saving ? <Loader2 className="h-3 w-3 animate-spin mr-1" /> : <Save className="h-3 w-3 mr-1" />}
+保存
+</Button>
+</>
+)}
+<Button variant="ghost" size="icon" className="h-8 w-8 text-slate-400" onClick={onClose}><X className="h-4 w-4" /></Button>
+</div>
+</div>
+{/* Body */}
+<div className="flex-1 overflow-auto p-4">
+{loading ? (
+<div className="flex items-center justify-center h-full"><Loader2 className="h-6 w-6 animate-spin text-slate-500" /></div>
+) : editing ? (
+<textarea
+value={yaml}
+onChange={e => setYaml(e.target.value)}
+className="w-full h-full min-h-[500px] bg-slate-950 text-emerald-400 font-mono text-xs p-4 rounded border border-slate-700 focus:outline-none focus:border-blue-500 resize-none"
+spellCheck={false}
+/>
+) : (
+<pre className="text-emerald-400 font-mono text-xs whitespace-pre overflow-x-auto">{yaml}</pre>
+)}
+</div>
+</div>
+</div>
+);
+}