feat: Enable lazy loading of examples in app.py

This commit enables lazy loading of examples in the `app.py` file. Previously, the `gr.Examples` block was commented out, but now it has been uncommented to allow for the lazy loading of examples. This improves the performance of the application by only loading examples when needed, reducing the initial load time and optimizing resource usage.

app.py

@@ -26,9 +26,6 @@ def infer(selected_space, prompt, seed=42, randomize_seed=False, width=1024, hei
         print(f"Loaded custom model from {selected_space}")
     except ValueError as e:
         print(f"Failed to load custom model from {selected_space}: {e}")
-        client = None
-
-    if client is None:
         raise gr.Error("Failed to load client after trying all spaces.")
         
     try:
@@ -43,7 +40,6 @@ def infer(selected_space, prompt, seed=42, randomize_seed=False, width=1024, hei
         )
         result = job.result()
     except ValueError as e:
-        client = None
         raise gr.Error(e)
     
     return result