fix: convert steps and guidance_scale to proper types

app.py

@@ -104,6 +104,18 @@ def generate(
                 print(f"LoRA loading failed: {error_msg}")
                 current_lora = None
         
+        # Convert guidance_scale to float
+        try:
+            guidance_scale_float = float(guidance_scale) if guidance_scale else 0.0
+        except (ValueError, TypeError):
+            guidance_scale_float = 0.0
+        
+        # Convert steps to int
+        try:
+            steps_int = int(steps) if steps else 9
+        except (ValueError, TypeError):
+            steps_int = 9
+        
         # Set scheduler
         if scheduler == "EulerDiscrete":
             pipe.scheduler = EulerDiscreteScheduler.from_config(pipe.scheduler.config)
@@ -122,8 +134,8 @@ def generate(
         result = pipe(
             prompt=prompt,
             negative_prompt=negative_prompt if negative_prompt else None,
-            num_inference_steps=steps,
-            guidance_scale=guidance_scale,
+            num_inference_steps=steps_int,
+            guidance_scale=guidance_scale_float,
             width=width,
             height=height,
             generator=generator,