قارئ قاعدة البيانات

- redesign Home dashboard
- add recent databases section
- add demo databases
- add quick actions
- add discover features
- replace feature navigation with BottomSheet table picker
- preserve normal Recent/Demo database flow
- improve analytics for Home interactions
- remove first-launch reward promo dialog
- improve ad placement
- fix monetization regressions
- restore premium/free limits
- improve overall UX