v 6.9.4

• Add rich message editor with media, tables and math formulas.
• Show rich message drafts with full formatting in chat compose area.
• Add text recognition with selection and copying to media viewer images.
• Add swipe navigation and pinch zoom gestures to media viewer.
• Support zoom and dragging files out in shared media photos.
• Allow adapting existing stickers into custom emoji.
• Add media viewer video playback to system media controls.
• Add alphabetical fast-scroll index to contacts box.
• Improve screen reader accessibility for chats list and folders.