Fix margin issues causing patchy background within content area

Margin fixes applied:
- Remove max-width constraint (max-width: none)
- Remove auto margins (margin: 0)
- Use full viewport width (width: 100vw)

This should eliminate margin-based gaps within the content area.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

app.py

@@ -398,11 +398,11 @@ with gr.Blocks(
             background: #fafafa !important;
         }
         .gradio-container {
-            max-width: 1200px !important;
-            margin-left: auto !important;
-            margin-right: auto !important;
+            max-width: none !important;
+            margin: 0 !important;
             background-color: #fafafa !important;
             font-family: 'Inter', 'Segoe UI', -apple-system, sans-serif !important;
+            width: 100vw !important;
         }
         .gr-row {
             display: flex !important;