fix(desktop): 修复 10 个 agent 对话测试发现的缺陷

- BUG-001+002 P0: 模型选择器合并 SaaS 可用模型列表
- BUG-003 P1: 修复 relay 错误消息重复显示
- BUG-005 P1: 设置页面显示实际连接模式和地址
- BUG-006 P2: 统一 UI 语言为中文
- BUG-009 P3: 错误时隐藏建议按钮
- BUG-010 P3: 密码切换按钮添加 aria-label

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/components/ChatArea.tsx

@@ -7,6 +7,7 @@ import { useArtifactStore } from '../store/chat/artifactStore';
 import { useConnectionStore } from '../store/connectionStore';
 import { useAgentStore } from '../store/agentStore';
 import { useConfigStore } from '../store/configStore';
+import { useSaaSStore } from '../store/saasStore';
 import { type UnlistenFn } from '@tauri-apps/api/event';
 import { safeListenEvent } from '../lib/safe-tauri';
 import { Paperclip, SquarePen, ArrowUp, MessageSquare, Download, X, FileText, Image as ImageIcon, Search } from 'lucide-react';
@@ -63,7 +64,21 @@ export function ChatArea() {
   const connectionState = useConnectionStore((s) => s.connectionState);
   const { activeClassroom, classroomOpen, closeClassroom, generating, progressPercent, progressActivity, error: classroomError, clearError: clearClassroomError } = useClassroomStore();
   const clones = useAgentStore((s) => s.clones);
-  const models = useConfigStore((s) => s.models);
+  const configModels = useConfigStore((s) => s.models);
+  const saasModels = useSaaSStore((s) => s.availableModels);
+  const isLoggedIn = useSaaSStore((s) => s.isLoggedIn);
+
+  // Merge models: SaaS available models take priority when logged in
+  const models = useMemo(() => {
+    if (isLoggedIn && saasModels.length > 0) {
+      return saasModels.map(m => ({
+        id: m.alias || m.id,
+        name: m.alias || m.id,
+        provider: m.provider_id,
+      }));
+    }
+    return configModels;
+  }, [isLoggedIn, saasModels, configModels]);
 
   const [input, setInput] = useState('');
   const [pendingFiles, setPendingFiles] = useState<File[]>([]);
@@ -418,8 +433,8 @@ export function ChatArea() {
               ) : (
                 <EmptyState
                   icon={<MessageSquare className="w-8 h-8" />}
-                  title="Welcome to ZCLAW"
-                  description={connected ? 'Send a message to start the conversation.' : 'Please connect to Gateway first in Settings.'}
+                  title="欢迎使用 ZCLAW"
+                  description={connected ? '发送消息开始对话。' : '请先在设置中连接 Gateway。'}
                 />
               )}
             </motion.div>
@@ -457,7 +472,7 @@ export function ChatArea() {
       <div className="p-4 bg-white dark:bg-gray-900">
         <div className="max-w-4xl mx-auto">
           {/* Suggestion chips */}
-          {!isStreaming && suggestions.length > 0 && (
+          {!isStreaming && suggestions.length > 0 && !messages.some(m => m.error) && (
             <SuggestionChips
               suggestions={suggestions}
               onSelect={(text) => { setInput(text); textareaRef.current?.focus(); }}