Fix .env: add real SECRET_KEY and production settings

.env

@@ -38,12 +38,12 @@ DEFAULT_MODEL=mistralai/mistral-7b-instruct
 
 # Development environment settings
 FLASK_APP=run.py
-FLASK_ENV=development
-FLASK_SECRET_KEY=your-secret-key-change-in-production
-DEBUG=True
+FLASK_ENV=production
+SECRET_KEY=3896abde1b46319d5345eaafce1385dce0c1dfbf8589daefb245ebbe45576d0c
+DEBUG=False
 
-# Port (Render will set this automatically)
-PORT=5000
+# Port (HF Spaces uses 7860)
+PORT=7860
 
 # ========================================
 # Database Configuration