优化Agent异常回退时的动态分析回复

app/(chat)/api/chat/route.ts

@@ -732,6 +732,22 @@ export async function POST(request: Request) {
       } catch (autoError) {
         // 智能分析失败时，回退到简单逻辑
         console.error("[Smart Auto Mode] ❌ Error, falling back:", autoError);
+        try {
+          const { analyzeIntent } = await import("@/lib/ai/smart-analyzer");
+          const rescueAnalysis = await analyzeIntent({
+            text: autoTextForFallback,
+            hasImage: autoHasImageForFallback || smartAutoHistoryImages.length > 0,
+            imageUrls: smartAutoHistoryImages,
+            imageFromHistory: autoFromHistoryForFallback || smartAutoHistoryImages.length > 0,
+            historyMessages: [],
+            context: undefined,
+          });
+          if (rescueAnalysis.conversationalReply?.trim()) {
+            smartAutoFriendlyMessage = rescueAnalysis.conversationalReply.trim();
+          }
+        } catch (rescueError) {
+          console.error("[Smart Auto Mode] Rescue analysis failed:", rescueError);
+        }
         
         const allModels = await getEnabledAiModelsWithProvider();
         // @ts-ignore - 检查各种可能的图片类型
@@ -744,9 +760,10 @@ export async function POST(request: Request) {
         if (hasImage) {
           bestModel = allModels.find(m => m.model.supportsImageGen && !m.model.isSubModel);
           smartAutoFriendlyMessage =
-            "我先完成这一轮图片分析，再按你的要求执行修改并返回结果。";
+            smartAutoFriendlyMessage ||
+            "我正在先做这一轮图片分析，接着按你的要求执行修改。";
         } else {
-          smartAutoFriendlyMessage = buildAutoModeFallbackMessage({
+          smartAutoFriendlyMessage = smartAutoFriendlyMessage || buildAutoModeFallbackMessage({
             text: autoTextForFallback,
             hasImage: false,
             fromHistory: false,