fix GC [no key], camera-off avatar, timestamps, GC remove error handling

add conversation delete with confirm

video-off shows avatar, show 'You' in GC, allow self-removal

remove group calling, fix video toggle visibility, fix empty Google setup container

group calls, flat group permissions, fix dropdown direction

fix read receipts and add WebRTC audio/video calling

fix read receipts (✓✓) not appearing and timezone mismatch

glass theme, read receipts, badge clearing, fix squished messages

fix message squish + optimistic send

auto-create dms on first message + notifications

add set-password option for google accounts

reuse register endpoint for google setup