Update disappearing messages bar button item

Revert "Switch to Xcode 26.0"

This reverts commit b530531.

Feature flags for .production.

Return early it unexpected upload size encountered

Workaround for dysfunctional UIKeyboardLayoutGuide on iOS 15.

• bring back keyboard frame tracking to OWSViewController if running on iOS 15.
• add our own layout guide to OWSViewController that is updated based on keyboard frame notifications on iOS 15; on newer iOS versions it's a proxy to view.keyboardLayoutGuide.
• use OWSViewController.keyboardLayoutGuide where needed.
• in media composer screen (not OWSVIewController subclass) we already track keyboard frame - use that to position bottom toolbar on iOS 15.

I have also discovered that profile avatar editing screen was somewhat broken on older (15, 16) iOS versions. Fixed that here.

Update translations

Snapshot chat list download banner byte count for 'Complete' state

Revert "Stop using InputAccessoryViewPlaceholder in chat. "

This reverts commit cccae56.

Feature flags for .production.

Revert "Switch to Xcode 26.0"

This reverts commit b530531.