Changes:
- Updated all theme tests to reflect new UI where theme selector is in profile dropdown
- Tests now use three-option SegmentedControl (light/dark/auto) instead of toggle button
- Added authentication flow to tests since profile dropdown requires login
- Updated test assertions to check for icon-based selection (sun, moon, desktop)
- Tests cover all three modes: light, dark, and auto/system preference
- Verify selected state indication in SegmentedControl
- Updated persistence tests to work with new UI flow
All theme tests now accurately test the current implementation.
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Co-Authored-By: Claude <noreply@anthropic.com>