fix: 修复流式聊天错误处理并增加model_id参数

- 流式请求失败时不再隐藏用户消息，而是展示错误回复
- 在 ChatMessage.meta 类型中增加 error 字段用于标记错误消息
- 在 streamChat 函数中增加 model_id 参数
- 在 ModelOverrides 类型中增加 model_id 字段

src/api.ts

@@ -91,19 +91,20 @@ export interface ToolCallTrace {
   result: any;
 }
 
-export interface ChatMessage {
-  id: string;
-  role: 'user' | 'assistant';
-  content: string;
+export interface ChatMessage {
+  id: string;
+  role: 'user' | 'assistant';
+  content: string;
   reasoning?: string | null;
-  parentId?: string | null;
-  createdAt: number;
-  meta?: {
-    retrieved?: RetrievedSnippet[];
-    toolCalls?: ToolCallTrace[];
-    aborted?: boolean;
+  parentId?: string | null;
+  createdAt: number;
+  meta?: {
+    retrieved?: RetrievedSnippet[];
+    toolCalls?: ToolCallTrace[];
+    aborted?: boolean;
     reasoning?: string;
-  } | null;
+    error?: string;
+  } | null;
 }
 
 export interface BranchInfo {
@@ -700,33 +701,36 @@ export interface StreamEvents {
 
 export interface ModelOverrides {
   model?: string;
+  model_id?: string;
   temperature?: number;
   topP?: number;
   maxTokens?: number;
 }
 
-export async function streamChat(
-  agentId: string,
-  content: string,
-  handlers: StreamEvents,
-  signal?: AbortSignal,
-  sessionId?: string,
+export async function streamChat(
+  agentId: string,
+  content: string,
+  handlers: StreamEvents,
+  signal?: AbortSignal,
+  sessionId?: string,
   model?: string,
-  imageUrls?: string[]
-) {
-  const resp = await fetch(`https://api.hoyidata.com/aura/v1/chat/${agentId}/messages/stream`, {
-    method: 'POST',
+  modelId?: string,
+  imageUrls?: string[]
+) {
+  const resp = await fetch(`https://api.hoyidata.com/aura/v1/chat/${agentId}/messages/stream`, {
+    method: 'POST',
     headers: { 'Content-Type': 'application/json', Accept: 'text/event-stream' },
-    body: JSON.stringify({
-      content,
-      sessionId,
+    body: JSON.stringify({
+      content,
+      sessionId,
       model,
+      model_id: modelId,
       imageUrls: imageUrls ?? []
-    }),
-    signal,
-    credentials: 'include'
-  });
-  return await consumeSSE(resp, handlers, signal);
+    }),
+    signal,
+    credentials: 'include'
+  });
+  return await consumeSSE(resp, handlers, signal);
 }
 
 /** 重新生成（开新分支）；行为同 streamChat */

src/pages/ChatPage.tsx

@@ -258,6 +258,7 @@ export default function ChatPage() {
     abortRef.current = ctrl;
 
     const model = overrides.model || parseAgentModels(agent?.model)[0] || '';
+    const modelId = overrides.model_id || '';
     const attText = buildAttachmentsText();
     const content = attText ? `${text}\n\n${attText}` : text;
 
@@ -363,7 +364,15 @@ export default function ChatPage() {
           },
           onError: (errMsg) => {
             msg.error('流式失败：' + errMsg);
-            setMessages((m) => (m || []).filter((x) => x.id !== tempUser.id));
+            // 创建错误消息作为助手回复，保留用户消息
+            const errorMessage: ChatMessage = {
+              id: 'error-' + Date.now(),
+              role: 'assistant',
+              content: `❌ 请求失败：${errMsg}`,
+              createdAt: Date.now(),
+              meta: { error: errMsg }
+            };
+            setMessages((m) => [...(m || []), errorMessage]);
             setStreaming({
               active: false,
               reasoningText: '',
@@ -378,13 +387,22 @@ export default function ChatPage() {
         ctrl.signal,
         sessionId || undefined,
         model,
+        modelId,
         imageUrls
       );
     } catch (e: any) {
       if (e?.name !== 'AbortError') {
         msg.error('请求失败：' + (e?.message ?? e));
+        // 创建错误消息作为助手回复，保留用户消息
+        const errorMessage: ChatMessage = {
+          id: 'error-' + Date.now(),
+          role: 'assistant',
+          content: `❌ 请求失败：${e?.message ?? String(e)}`,
+          createdAt: Date.now(),
+          meta: { error: e?.message ?? String(e) }
+        };
+        setMessages((m) => [...(m || []), errorMessage]);
       }
-      setMessages((m) => (m || []).filter((x) => x.id !== tempUser.id));
       setStreaming({
         active: false,
         reasoningText: '',