Enhance Gradio app initialization in app.py by adding custom CSS and JS parameters to the Blocks component. Refactor asset loading to streamline the launch process by using a list comprehension for existing assets.

app.py

@@ -389,7 +389,7 @@ def build_multilingual_leaderboard():
 # GRADIO APP
 # ========================
 
-demo = gr.Blocks(title=TITLE)
+demo = gr.Blocks(title=TITLE, css=custom_css, js=custom_js)
 
 with demo:
     gr.HTML(f"""
@@ -526,13 +526,6 @@ with demo:
 
 
 if __name__ == "__main__":
-    assets = []
     import os
-    for p in [black_logo_path, white_logo_path]:
-        if os.path.exists(p):
-            assets.append(p)
-    demo.launch(
-        css=custom_css,
-        js=custom_js,
-        allowed_paths=assets if assets else None,
-    )
+    assets = [p for p in [black_logo_path, white_logo_path] if os.path.exists(p)]
+    demo.launch(allowed_paths=assets if assets else None)