feat(chat): write API keys to OpenClaw and embed Control UI for chat

Part 1: API Key Integration
- Create electron/utils/openclaw-auth.ts to write keys to
  ~/.openclaw/agents/main/agent/auth-profiles.json
- Update provider:save and provider:setApiKey IPC handlers to
  persist keys to OpenClaw auth-profiles alongside ClawX storage
- Save API key to OpenClaw on successful validation in Setup wizard
- Pass provider API keys as environment variables when starting
  the Gateway process (ANTHROPIC_API_KEY, OPENROUTER_API_KEY, etc.)

Part 2: Embed OpenClaw Control UI for Chat
- Replace custom Chat UI with <webview> embedding the Gateway's
  built-in Control UI at http://127.0.0.1:{port}/?token={token}
- Add gateway:getControlUiUrl IPC handler to provide tokenized URL
- Enable webviewTag in Electron BrowserWindow preferences
- Override X-Frame-Options/CSP headers to allow webview embedding
- Suppress noisy control-ui token_mismatch stderr messages
- Add loading/error states for the embedded webview

This fixes the "No API key found for provider" error and replaces
the buggy custom chat implementation with OpenClaw's battle-tested
Control UI.

src/pages/Chat/index.tsx

@@ -1,399 +1,164 @@
 /**
  * Chat Page
- * Conversation interface with AI
+ * Embeds OpenClaw's Control UI for chat functionality.
+ * The Control UI handles all chat protocol details (sessions, streaming, etc.)
+ * and is served by the Gateway at http://127.0.0.1:{port}/
  */
 import { useState, useEffect, useRef, useCallback } from 'react';
-import { 
-  Send, 
-  Trash2, 
-  Bot, 
-  User, 
-  Copy, 
-  Check, 
-  RefreshCw,
-  AlertCircle,
-  Sparkles,
-  MessageSquare,
-} from 'lucide-react';
-import ReactMarkdown from 'react-markdown';
-import remarkGfm from 'remark-gfm';
+import { AlertCircle, RefreshCw, Loader2 } from 'lucide-react';
 import { Button } from '@/components/ui/button';
-import { Textarea } from '@/components/ui/textarea';
-import { Card, CardContent } from '@/components/ui/card';
-import { useChatStore } from '@/stores/chat';
 import { useGatewayStore } from '@/stores/gateway';
-import { LoadingSpinner } from '@/components/common/LoadingSpinner';
-import { cn, formatRelativeTime } from '@/lib/utils';
-import { toast } from 'sonner';
 
-// Message component with markdown support
-interface ChatMessageProps {
-  message: {
-    id: string;
-    role: 'user' | 'assistant' | 'system';
-    content: string;
-    timestamp: string;
-    toolCalls?: Array<{
-      id: string;
-      name: string;
-      arguments: Record<string, unknown>;
-      result?: unknown;
-      status: 'pending' | 'running' | 'completed' | 'error';
-    }>;
-  };
-}
-
-function ChatMessage({ message }: ChatMessageProps) {
-  const [copied, setCopied] = useState(false);
-  const isUser = message.role === 'user';
-  
-  const copyContent = useCallback(() => {
-    navigator.clipboard.writeText(message.content);
-    setCopied(true);
-    setTimeout(() => setCopied(false), 2000);
-  }, [message.content]);
-  
-  return (
-    <div
-      className={cn(
-        'flex gap-3 group',
-        isUser ? 'flex-row-reverse' : 'flex-row'
-      )}
-    >
-      {/* Avatar */}
-      <div
-        className={cn(
-          'flex h-8 w-8 shrink-0 items-center justify-center rounded-full',
-          isUser
-            ? 'bg-primary text-primary-foreground'
-            : 'bg-gradient-to-br from-indigo-500 to-purple-600 text-white'
-        )}
-      >
-        {isUser ? (
-          <User className="h-4 w-4" />
-        ) : (
-          <Sparkles className="h-4 w-4" />
-        )}
-      </div>
-      
-      {/* Message Content */}
-      <div
-        className={cn(
-          'relative max-w-[80%] rounded-2xl px-4 py-3',
-          isUser
-            ? 'bg-primary text-primary-foreground'
-            : 'bg-muted'
-        )}
-      >
-        {isUser ? (
-          <p className="whitespace-pre-wrap">{message.content}</p>
-        ) : (
-          <div className="prose prose-sm dark:prose-invert max-w-none">
-            <ReactMarkdown
-              remarkPlugins={[remarkGfm]}
-              components={{
-                // Custom code block styling
-                code({ className, children, ...props }) {
-                  const match = /language-(\w+)/.exec(className || '');
-                  const isInline = !match && !className;
-                  
-                  if (isInline) {
-                    return (
-                      <code className="bg-background/50 px-1.5 py-0.5 rounded text-sm font-mono" {...props}>
-                        {children}
-                      </code>
-                    );
-                  }
-                  
-                  return (
-                    <div className="relative group/code">
-                      {match && (
-                        <div className="absolute right-2 top-2 flex items-center gap-2">
-                          <span className="text-xs text-muted-foreground opacity-60">
-                            {match[1]}
-                          </span>
-                          <Button
-                            variant="ghost"
-                            size="icon"
-                            className="h-6 w-6 opacity-0 group-hover/code:opacity-100 transition-opacity"
-                            onClick={() => {
-                              navigator.clipboard.writeText(String(children));
-                              toast.success('Code copied!');
-                            }}
-                          >
-                            <Copy className="h-3 w-3" />
-                          </Button>
-                        </div>
-                      )}
-                      <pre className="bg-background/50 rounded-lg p-4 overflow-x-auto">
-                        <code className={cn('text-sm font-mono', className)} {...props}>
-                          {children}
-                        </code>
-                      </pre>
-                    </div>
-                  );
-                },
-                // Custom link styling
-                a({ href, children }) {
-                  return (
-                    <a
-                      href={href}
-                      target="_blank"
-                      rel="noopener noreferrer"
-                      className="text-primary hover:underline"
-                    >
-                      {children}
-                    </a>
-                  );
-                },
-              }}
-            >
-              {message.content}
-            </ReactMarkdown>
-          </div>
-        )}
-        
-        {/* Timestamp and actions */}
-        <div className={cn(
-          'flex items-center gap-2 mt-2',
-          isUser ? 'justify-end' : 'justify-between'
-        )}>
-          <p
-            className={cn(
-              'text-xs',
-              isUser
-                ? 'text-primary-foreground/70'
-                : 'text-muted-foreground'
-            )}
-          >
-            {formatRelativeTime(message.timestamp)}
-          </p>
-          
-          {!isUser && (
-            <Button
-              variant="ghost"
-              size="icon"
-              className="h-6 w-6 opacity-0 group-hover:opacity-100 transition-opacity"
-              onClick={copyContent}
-            >
-              {copied ? (
-                <Check className="h-3 w-3 text-green-500" />
-              ) : (
-                <Copy className="h-3 w-3" />
-              )}
-            </Button>
-          )}
-        </div>
-        
-        {/* Tool Calls */}
-        {message.toolCalls && message.toolCalls.length > 0 && (
-          <div className="mt-3 space-y-2 border-t pt-2">
-            <p className="text-xs font-medium text-muted-foreground">Tools Used:</p>
-            {message.toolCalls.map((tool) => (
-              <Card key={tool.id} className="bg-background/50">
-                <CardContent className="p-2">
-                  <div className="flex items-center justify-between">
-                    <p className="text-xs font-medium">{tool.name}</p>
-                    <span className={cn(
-                      'text-xs px-1.5 py-0.5 rounded',
-                      tool.status === 'completed' && 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-400',
-                      tool.status === 'running' && 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400',
-                      tool.status === 'error' && 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400',
-                      tool.status === 'pending' && 'bg-gray-100 text-gray-700 dark:bg-gray-900/30 dark:text-gray-400'
-                    )}>
-                      {tool.status}
-                    </span>
-                  </div>
-                </CardContent>
-              </Card>
-            ))}
-          </div>
-        )}
-      </div>
-    </div>
-  );
-}
-
-// Typing indicator component
-function TypingIndicator() {
-  return (
-    <div className="flex gap-3">
-      <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full bg-gradient-to-br from-indigo-500 to-purple-600 text-white">
-        <Sparkles className="h-4 w-4" />
-      </div>
-      <div className="bg-muted rounded-2xl px-4 py-3">
-        <div className="flex gap-1">
-          <span className="w-2 h-2 bg-muted-foreground/50 rounded-full animate-bounce" style={{ animationDelay: '0ms' }} />
-          <span className="w-2 h-2 bg-muted-foreground/50 rounded-full animate-bounce" style={{ animationDelay: '150ms' }} />
-          <span className="w-2 h-2 bg-muted-foreground/50 rounded-full animate-bounce" style={{ animationDelay: '300ms' }} />
-        </div>
-      </div>
-    </div>
-  );
-}
-
-// Welcome screen component
-function WelcomeScreen() {
-  return (
-    <div className="flex h-full flex-col items-center justify-center text-center p-8">
-      <div className="w-20 h-20 rounded-2xl bg-gradient-to-br from-indigo-500 to-purple-600 flex items-center justify-center mb-6">
-        <Bot className="h-10 w-10 text-white" />
-      </div>
-      <h2 className="text-2xl font-bold mb-2">Welcome to ClawX Chat</h2>
-      <p className="text-muted-foreground mb-8 max-w-md">
-        I'm your AI assistant, ready to help with tasks, answer questions, and more. 
-        Start by typing a message below.
-      </p>
-      
-      <div className="grid grid-cols-2 gap-4 max-w-lg w-full">
-        {[
-          { icon: MessageSquare, title: 'Ask Questions', desc: 'Get answers on any topic' },
-          { icon: Sparkles, title: 'Creative Tasks', desc: 'Writing, brainstorming, ideas' },
-        ].map((item, i) => (
-          <Card key={i} className="text-left">
-            <CardContent className="p-4">
-              <item.icon className="h-6 w-6 text-primary mb-2" />
-              <h3 className="font-medium">{item.title}</h3>
-              <p className="text-sm text-muted-foreground">{item.desc}</p>
-            </CardContent>
-          </Card>
-        ))}
-      </div>
-    </div>
-  );
-}
+// Custom CSS to inject into the Control UI to match ClawX theme
+const CUSTOM_CSS = `
+  /* Hide the Control UI header/nav that we don't need */
+  .gateway-header, [data-testid="gateway-header"] {
+    display: none !important;
+  }
+  /* Remove top padding that the header would occupy */
+  body, #root {
+    background: transparent !important;
+  }
+  /* Ensure the chat area fills the frame */
+  .chat-container, [data-testid="chat-container"] {
+    height: 100vh !important;
+    max-height: 100vh !important;
+  }
+`;
 
 export function Chat() {
-  const { messages, loading, sending, error, fetchHistory, sendMessage, clearHistory } = useChatStore();
   const gatewayStatus = useGatewayStore((state) => state.status);
-  const [input, setInput] = useState('');
-  const messagesEndRef = useRef<HTMLDivElement>(null);
-  const textareaRef = useRef<HTMLTextAreaElement>(null);
+  const [controlUiUrl, setControlUiUrl] = useState<string | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const webviewRef = useRef<HTMLWebViewElement>(null);
   
   const isGatewayRunning = gatewayStatus.state === 'running';
   
-  // Fetch history on mount
+  // Fetch Control UI URL when gateway is running
   useEffect(() => {
-    if (isGatewayRunning) {
-      fetchHistory();
+    if (!isGatewayRunning) {
+      setControlUiUrl(null);
+      setLoading(false);
+      return;
     }
-  }, [fetchHistory, isGatewayRunning]);
-  
-  // Auto-scroll to bottom on new messages
-  useEffect(() => {
-    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
-  }, [messages, sending]);
-  
-  // Auto-resize textarea
-  useEffect(() => {
-    if (textareaRef.current) {
-      textareaRef.current.style.height = 'auto';
-      textareaRef.current.style.height = `${Math.min(textareaRef.current.scrollHeight, 200)}px`;
-    }
-  }, [input]);
-  
-  // Handle send message
-  const handleSend = useCallback(async () => {
-    if (!input.trim() || sending || !isGatewayRunning) return;
     
-    const content = input.trim();
-    setInput('');
-    await sendMessage(content);
-  }, [input, sending, isGatewayRunning, sendMessage]);
+    setLoading(true);
+    setError(null);
+    
+    window.electron.ipcRenderer.invoke('gateway:getControlUiUrl')
+      .then((result: unknown) => {
+        const r = result as { success: boolean; url?: string; error?: string };
+        if (r.success && r.url) {
+          setControlUiUrl(r.url);
+        } else {
+          setError(r.error || 'Failed to get Control UI URL');
+        }
+      })
+      .catch((err: unknown) => {
+        setError(String(err));
+      })
+      .finally(() => {
+        setLoading(false);
+      });
+  }, [isGatewayRunning]);
   
-  // Handle key press
-  const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
-    if (e.key === 'Enter' && !e.shiftKey) {
-      e.preventDefault();
-      handleSend();
+  // Inject custom CSS when webview loads
+  const handleWebviewReady = useCallback(() => {
+    const webview = webviewRef.current as unknown as HTMLElement & {
+      addEventListener: (event: string, cb: (e: unknown) => void) => void;
+      insertCSS: (css: string) => Promise<string>;
+      reload: () => void;
+    };
+    if (!webview) return;
+    
+    webview.addEventListener('dom-ready', () => {
+      // Inject custom CSS to match ClawX theme
+      webview.insertCSS(CUSTOM_CSS).catch((err: unknown) => {
+        console.warn('Failed to inject CSS:', err);
+      });
+      setLoading(false);
+    });
+    
+    webview.addEventListener('did-fail-load', (event: unknown) => {
+      const e = event as { errorCode: number; errorDescription: string };
+      if (e.errorCode !== -3) { // -3 is ERR_ABORTED, ignore it
+        setError(`Failed to load: ${e.errorDescription}`);
+        setLoading(false);
+      }
+    });
+  }, []);
+  
+  // Set up webview event listeners
+  useEffect(() => {
+    if (controlUiUrl && webviewRef.current) {
+      handleWebviewReady();
     }
-  }, [handleSend]);
+  }, [controlUiUrl, handleWebviewReady]);
   
-  return (
-    <div className="flex h-[calc(100vh-8rem)] flex-col">
-      {/* Gateway Warning */}
-      {!isGatewayRunning && (
-        <div className="bg-yellow-50 dark:bg-yellow-900/20 border-b border-yellow-200 dark:border-yellow-800 px-4 py-3 flex items-center gap-3">
-          <AlertCircle className="h-5 w-5 text-yellow-600 dark:text-yellow-400" />
-          <span className="text-sm text-yellow-700 dark:text-yellow-300">
-            Gateway is not running. Chat functionality is unavailable.
-          </span>
-        </div>
-      )}
-      
-      {/* Messages Area */}
-      <div className="flex-1 overflow-auto p-4 space-y-4">
-        {loading ? (
-          <div className="flex h-full items-center justify-center">
-            <LoadingSpinner size="lg" />
-          </div>
-        ) : messages.length === 0 ? (
-          <WelcomeScreen />
-        ) : (
-          <>
-            {messages.map((message) => (
-              <ChatMessage key={message.id} message={message} />
-            ))}
-            {sending && <TypingIndicator />}
-            <div ref={messagesEndRef} />
-          </>
-        )}
-      </div>
-      
-      {/* Error Display */}
-      {error && (
-        <div className="px-4 py-2 bg-red-50 dark:bg-red-900/20 border-t border-red-200 dark:border-red-800">
-          <p className="text-sm text-red-600 dark:text-red-400 flex items-center gap-2">
-            <AlertCircle className="h-4 w-4" />
-            {error}
-          </p>
-        </div>
-      )}
-      
-      {/* Input Area */}
-      <div className="border-t p-4 bg-background">
-        <div className="flex items-end gap-2">
-          <Button
-            variant="ghost"
-            size="icon"
-            onClick={clearHistory}
-            disabled={messages.length === 0}
-            title="Clear history"
-          >
-            <Trash2 className="h-4 w-4" />
-          </Button>
-          
-          <div className="flex-1 relative">
-            <Textarea
-              ref={textareaRef}
-              value={input}
-              onChange={(e) => setInput(e.target.value)}
-              onKeyDown={handleKeyDown}
-              placeholder={isGatewayRunning ? "Type a message... (Shift+Enter for new line)" : "Gateway not connected..."}
-              disabled={sending || !isGatewayRunning}
-              className="min-h-[44px] max-h-[200px] resize-none pr-12"
-              rows={1}
-            />
-          </div>
-          
-          <Button 
-            onClick={handleSend} 
-            disabled={!input.trim() || sending || !isGatewayRunning}
-            size="icon"
-            className="shrink-0"
-          >
-            {sending ? (
-              <RefreshCw className="h-4 w-4 animate-spin" />
-            ) : (
-              <Send className="h-4 w-4" />
-            )}
-          </Button>
-        </div>
-        
-        <p className="text-xs text-muted-foreground mt-2 text-center">
-          Press Enter to send, Shift+Enter for new line
+  const handleReload = useCallback(() => {
+    const webview = webviewRef.current as unknown as HTMLElement & { reload: () => void };
+    if (webview) {
+      setLoading(true);
+      setError(null);
+      webview.reload();
+    }
+  }, []);
+  
+  // Gateway not running state
+  if (!isGatewayRunning) {
+    return (
+      <div className="flex h-[calc(100vh-8rem)] flex-col items-center justify-center text-center p-8">
+        <AlertCircle className="h-12 w-12 text-yellow-500 mb-4" />
+        <h2 className="text-xl font-semibold mb-2">Gateway Not Running</h2>
+        <p className="text-muted-foreground max-w-md">
+          The OpenClaw Gateway needs to be running to use chat. 
+          It will start automatically, or you can start it from Settings.
         </p>
       </div>
+    );
+  }
+  
+  return (
+    <div className="flex h-[calc(100vh-4rem)] flex-col relative">
+      {/* Loading overlay */}
+      {loading && (
+        <div className="absolute inset-0 z-10 flex items-center justify-center bg-background/80">
+          <div className="flex flex-col items-center gap-3">
+            <Loader2 className="h-8 w-8 animate-spin text-primary" />
+            <p className="text-sm text-muted-foreground">Loading chat...</p>
+          </div>
+        </div>
+      )}
+      
+      {/* Error state */}
+      {error && (
+        <div className="absolute inset-0 z-10 flex flex-col items-center justify-center bg-background p-8 text-center">
+          <AlertCircle className="h-12 w-12 text-red-500 mb-4" />
+          <h2 className="text-xl font-semibold mb-2">Connection Error</h2>
+          <p className="text-muted-foreground max-w-md mb-4">{error}</p>
+          <Button onClick={handleReload} variant="outline">
+            <RefreshCw className="h-4 w-4 mr-2" />
+            Retry
+          </Button>
+        </div>
+      )}
+      
+      {/* Embedded Control UI */}
+      {controlUiUrl && (
+        <webview
+          ref={webviewRef as unknown as React.RefObject<HTMLElement>}
+          src={controlUiUrl}
+          className="flex-1 w-full h-full border-0"
+          // @ts-expect-error webview attributes not in React types
+          allowpopups="true"
+          style={{ 
+            display: error ? 'none' : 'flex',
+            flex: 1,
+            minHeight: 0,
+          }}
+        />
+      )}
     </div>
   );
 }