Add clickable reference badges and improve UI layout

- Add clickable badges for backlinks and references that trigger query string searches
- Improve toggle checkbox layout with better styling
- Add description block styling with scrollable container
- Update results styling with bordered cards and shadows
- Add favicon support across pages
- Enhance .env loading with logging for debugging

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

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

config.py

@@ -19,9 +19,14 @@ from typing import Optional
 # Load .env file if it exists
 try:
     from dotenv import load_dotenv
+    import logging
+    _logger = logging.getLogger(__name__)
+
     _env_path = Path(__file__).parent / ".env"
     if _env_path.exists():
-        load_dotenv(_env_path)
+        _logger.info(f"Loading .env from: {_env_path}")
+        result = load_dotenv(_env_path, override=True)
+        _logger.info(f"load_dotenv result: {result}")
 except ImportError:
     pass  # python-dotenv not installed