From 641827031f66bd7a681f452e4b0076906f0c1e13 Mon Sep 17 00:00:00 2001
From: Your Name <your.email@example.com>
Date: Tue, 10 Mar 2026 09:22:05 +0800
Subject: [PATCH] optimize fallback image prompts in auto mode

---
 app/(chat)/api/chat/route.ts | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/app/(chat)/api/chat/route.ts b/app/(chat)/api/chat/route.ts
index cf4498ba4..eb67e224e 100644
--- a/app/(chat)/api/chat/route.ts
+++ b/app/(chat)/api/chat/route.ts
@@ -3372,6 +3372,35 @@ export async function POST(request: Request) {
           }
         }
         
+        if (
+          !smartAutoOptimizedPrompt &&
+          smartAutoExecution?.shouldOptimizePrompt &&
+          (smartAutoDetectedIntent === "image_edit" || smartAutoDetectedIntent === "image_gen")
+        ) {
+          try {
+            const { optimizePrompt } = await import("@/lib/ai/prompt-optimizer");
+            const optimizedFallback = optimizePrompt({
+              originalPrompt: autoTextForFallback,
+              intent: smartAutoDetectedIntent,
+              subIntent: smartAutoExecution.routeSubIntent,
+            });
+            if (optimizedFallback.optimizedPrompt?.trim()) {
+              smartAutoOptimizedPrompt = optimizedFallback.optimizedPrompt.trim();
+              console.log("[Smart Auto Mode] ✨ Prompt optimized (fallback heuristic):", {
+                original: autoTextForFallback.substring(0, 80),
+                optimized: smartAutoOptimizedPrompt.substring(0, 140),
+                intent: smartAutoDetectedIntent,
+                subIntent: smartAutoExecution.routeSubIntent || null,
+              });
+            }
+            if (!smartAutoRecommendedImageParams && optimizedFallback.recommendedImageParams) {
+              smartAutoRecommendedImageParams = optimizedFallback.recommendedImageParams;
+            }
+          } catch (fallbackOptimizeError) {
+            console.warn("[Smart Auto Mode] Fallback prompt optimization failed:", fallbackOptimizeError);
+          }
+        }
+
         const allModels = await getEnabledAiModelsWithProvider();
         const hasImage =
           autoCurrentImageUrlsForFallback.length > 0 || smartAutoHistoryImages.length > 0;