v0.1.0

Changelog

• f552aaa Add TUI account switcher in toolbar
• ff92116 Add TUI core with bubbletea scaffolding
• e6282d8 Add TUI orders view with table and cancel confirmation
• 53f150e Add TUI portfolio view with positions table and account summary
• 5aab0e2 Add TUI trade screen with buy/sell form and confirmation
• 2b86815 Add TUI watchlist view with add/remove symbols and live quotes
• 1b5cbbf Fix TUI portfolio Total Value calculation
• df0236a Fix watchlist showing 'Loading quotes...' for empty watchlist
• a2a590f Merge main into feature/tui
• 5f558fb Refactor TUI into internal/tui package with multi-model architecture