fix: change prompt to 3D render to avoid IMAGE_RECITATION filter

backend/server.js

@@ -387,8 +387,8 @@ app.post('/api/sparkplug/generate-images', authenticate, async (req, res) => {
 
     // Run parallel generation for all 4 views
     const promises = views.map(async (view, index) => {
-      const fullPrompt = `A clean, isolated product photography shot of: ${prompt}. 
-Focus ONLY on the product itself. 
+      const fullPrompt = `A clean, isolated 3D render concept art of: ${prompt}. 
+Focus ONLY on the object itself. 
 View: ${view}.
 CRITICAL INSTRUCTIONS:
 1. Pure white background.