Update app.py

app.py

@@ -18,7 +18,7 @@ def solve_competitive_problem(problem_statement, language_choice, api_key, remem
     Returns:
         str: Step-by-step solution with code
     """
-    if not api_key.strip():
+    if not api_key or not api_key.strip():
         return "Error: Please provide your OpenRouter API key."
     
     if not problem_statement.strip():
@@ -79,12 +79,10 @@ Format your answer with clear headings and subheadings. Use markdown formatting
                 "X-Title": "Competitive Programming Assistant",
             },
             model="open-r1/olympiccoder-7b:free",
-            messages=[
-                {
-                    "role": "user",
-                    "content": prompt
-                }
-            ],
+            messages=[{
+                "role": "user",
+                "content": prompt
+            }],
             temperature=0.7,
             stream=True  # Enable streaming for partial results
         )
@@ -124,7 +122,7 @@ def save_api_key(api_key, remember):
     """
     return f"""
     function() {{
-        if ({str(remember).lower()}) {{
+        if ({str(remember).toLowerCase()}) {{
             localStorage.setItem('openrouter_api_key', "{api_key}");
         }} else {{
             localStorage.removeItem('openrouter_api_key');
@@ -210,7 +208,7 @@ with gr.Blocks(title="Competitive Programming Assistant", theme=light_theme, css
         }
     });
     """)
-    
+
     # App header with theme toggle
     with gr.Row(elem_classes="responsive-padding"):
         gr.Markdown("""