BREAKING CHANGE: Login is no longer automatic when opening webview
Changes:
- Remove auto-login on webview open and restore
- Add /login slash command for manual authentication
- Add VSCode progress notification during login process
- Add warning notification when user tries to chat without login
- Implement pending message auto-retry after successful login
- Add NotLoggedInMessage component (for future use)
- Improve InfoBanner close button styling consistency
User flow:
1. Open webview - no automatic login
2. Type /login or select from completion menu to login
3. Show "Logging in to Qwen Code..." progress notification
4. After login, show success message and auto-retry pending messages
5. If user tries to chat without login, show warning with "Login Now" button
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
