- Update STICKY_HEADER_CLASS constant to include safe-area-top
- Fixes sticky tabs in Search and Settings pages on mobile
- Ensures sticky headers respect device notches and status bars
- Feed and NotificationsPage already use top-mobile-bar which includes safe area
- Created QuickReactMenu component with horizontal emoji bar
- Quick access to 6 common emojis (❤️, 😂, 💯, 🔥, 👍, 📌)
- "..." button opens full EmojiPicker for more options
- Updated ReactionButton to use QuickReactMenu instead of full picker
- Matches Ditto UX: click shows quick react menu, ... reveals full picker
Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>