Initial commit: ETF Trade Tracker with multi-user authentication

Features:
- Multi-user authentication system with admin panel
- SQLite database with user isolation
- Trade entry, history, and portfolio tracking
- Gains/losses calculation with price updates
- Responsive design with sidebar navigation
- Session-based authentication with bcrypt password hashing
- Admin user management capabilities

Default admin credentials: admin/admin123

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

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

.gitignore

@@ -0,0 +1,6 @@
+node_modules/
+etf_trades.db
+*.log
+.env
+.DS_Store
+cookies.txt