Increase category distribution plot height for readability

- Set height to 450px (approximately 3x default)

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

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -798,6 +798,7 @@ https://github.com/chrissoria/cat-llm
                 title="Category Distribution (%)",
                 horizontal=True,
                 x_lim=[0, 100],
+                height=450,
                 visible=False
             )
             sample_results = gr.DataFrame(label="Sample Results (First 5 Rows)", visible=False)