Add seaborn integration to fix 'sns is not defined' errors

SEABORN INTEGRATION:
- Add 'import seaborn as sns' to code template in src.py
- Add 'sns': __import__('seaborn') to execution globals
- Ensures seaborn is available in all generated code without import errors

FIXES:
- "name 'sns' is not defined" errors in correlation analysis
- Missing seaborn imports in heatmaps and statistical plots
- Enables sns.barplot(), sns.heatmap(), sns.scatterplot() usage

Now all seaborn visualization functions work seamlessly with the awesome matplotlib styling.

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

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

src.py

@@ -145,6 +145,7 @@ def ask_question(model_name, question):
         local_vars = {}
         global_vars = {
             'pd': pd, 'plt': plt, 'os': os,
+            'sns': __import__('seaborn'),
             'uuid': __import__('uuid'),
             'calendar': __import__('calendar'),
             'np': __import__('numpy'),
@@ -248,6 +249,7 @@ def ask_question(model_name, question):
     template = f"""```python
 import pandas as pd
 import matplotlib.pyplot as plt
+import seaborn as sns
 import uuid
 import calendar
 import numpy as np