- New settings page: Watch Folders with add/remove/edit controls
- Each watch folder has: path, linked preset dropdown, recursive toggle,
active/inactive switch, and remove button
- Watch folder config persisted in AppConfig
- Empty state message when no folders configured
Semi-transparent dialog-based tour with 6 stops covering step
indicator, workflow selection, image adding, navigation, menu,
and a final ready message. Skippable at any time. State persisted
via tutorial_complete flag in AppConfig.
- Add history_max_entries (default 50) and history_max_days (default 30)
to AppConfig
- Add prune() method to HistoryStore that removes old entries by age
and count limits
- Call prune after each history entry is added in the GUI
- Preserve history settings through settings dialog save/load cycle
- Welcome dialog buttons navigate between pages
- Done button closes dialog and marks first_run_complete
- Show welcome dialog on first launch only
- Add first_run_complete field to AppConfig with serde(default)
