[_] bugfix/Design fixes

[CandelR]

Added design adjustments to the selection UI to fit design and a fix for the Security modal on the Account screen.
Also added (on iOS only) in select mode, drag across the photo grid to select a range of photos in one gesture.

Summary

• Photos selection UI: removed the standaloneSelectionHeader component — cancel button and selection count are now part of PhotosHeader, which handles both normal and select-mode states. Unselected items no longer show an empty checkbox. Removed date group section headers from the timeline grid.

• Swipe-to-select gesture (iOS): in select mode, hold and drag across the grid to select or deselect a range of photos in a single gesture. The anchor is captured at touch-down (before pan activation) so the first cell under the finger is always included. Dragging from an already selected photo deselects the range. Auto-scrolls when the finger reaches the top or bottom edge. Disabled on Android due to an unresolvable conflict between Gesture.Pan and FlashList scroll.

• SecurityModal: fixed incorrect rendering on the Account screen

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.4% Duplication on New Code

See analysis details on SonarQube Cloud