# Tasks

- [x] Analyze current `SettingsWindow`, appearance theme service, and existing settings page layout.
- [x] Compare ClassIsland `SettingsWindowNew` and SecRandom v3 Avalonia `SettingsView`.
- [x] Replace footer fallback pane toggle with titlebar pane toggle.
- [x] Add titlebar Back, search, restart, and more-options controls.
- [x] Add settings navigation history.
- [x] Add settings search service and result highlight.
- [x] Add `auto` system material mode and Avalonia `TransparencyLevelHint` priority.
- [x] Update appearance settings options and localization.
- [x] Add focused tests for material normalization and search filtering.
- [x] Add design/spec documentation.
- [ ] Run full app manually on Windows 11 and Windows 10 to verify actual Mica/Acrylic backdrops.