chore: Update Gradio UI layout for image generation and processing

app.py

@@ -198,7 +198,6 @@ with gr.Blocks() as demo:
                     label='Enter your prompt (English)', scale=2)
                 submit_prompt = gr.Button(
                     'Generate Image', scale=1, variant='primary')
-                img = gr.Image()
 
             with gr.Row(variant="panel"):
                 with gr.Column():
@@ -273,10 +272,8 @@ with gr.Blocks() as demo:
 
     mv_images = gr.State()
 
-    submit_prompt.click(fn=generate_image, inputs=[prompt], outputs=img)
-    submit_process.click(fn=check_input_image, inputs=[input_image]).success(
-        fn=preprocess, inputs=[input_image,
-                               do_remove_background], outputs=[processed_image],
+    submit_prompt.click(fn=generate_image, inputs=[prompt], outputs=input_image).success(
+        fn=preprocess, inputs=[input_image, True], outputs=[processed_image]
     )
     submit_mesh.click(fn=generate_mvs, inputs=[processed_image, sample_steps, sample_seed], outputs=[mv_images, mv_show_images]).success(
         fn=make3d, inputs=[mv_images], outputs=[