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

@@ -103,6 +103,7 @@ export interface ChatMessage {
     toolCalls?: ToolCallTrace[];
     aborted?: boolean;
     reasoning?: string;
+    error?: string;
   } | null;
 }
 
@@ -700,6 +701,7 @@ export interface StreamEvents {
 
 export interface ModelOverrides {
   model?: string;
+  model_id?: string;
   temperature?: number;
   topP?: number;
   maxTokens?: number;
@@ -712,6 +714,7 @@ export async function streamChat(
   signal?: AbortSignal,
   sessionId?: string,
   model?: string,
+  modelId?: string,
   imageUrls?: string[]
 ) {
   const resp = await fetch(`https://api.hoyidata.com/aura/v1/chat/${agentId}/messages/stream`, {
@@ -721,6 +724,7 @@ export async function streamChat(
       content,
       sessionId,
       model,
+      model_id: modelId,
       imageUrls: imageUrls ?? []
     }),
     signal,

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: '',