Update main.py

main.py

@@ -57,7 +57,7 @@ _vision_model    = None
 _vision_processor = None
 
 # Vision is ON by default — set ENABLE_VISION_CAPTION=false to disable
-ENABLE_VISION_CAPTION = os.getenv("ENABLE_VISION_CAPTION", "true").lower() == "true"
+ENABLE_VISION_CAPTION = False
 
 
 # ═══════════════════════════════════════════════════════════════════════════