feat: add option to disable pull-down search bar expansion on home page

fix: remove off-by-one in ProfileActivity search highlight causing IndexOutOfBoundsException

feat: add model fetching and connection testing for LLM translator

fix: use NullgramVersion format for version info in new SettingsActivity

feat: support multiple API formats and add new LLM providers

Merged official 12.6.3

feat: keep Telegram contact nickname on phone book sync

fix: three-button navigation open menu height calculation in ChatActivity

fix: add bounds check in SortListAdapter init to prevent IndexOutOfBoundsException (#88)

fix: long-pressing text in a text box causes NPE

fix: send GIF caption entities

Merge official 12.5.1

update to 12.5.1 (6580)

update to 12.5.0 (6573)

update to 12.4.3 (6527)