MentionPicker
App@-trigger autocomplete picker. Headless: takes users + query + position, fires onSelect. Keyboard nav (ArrowUp/Down, Enter/Tab, Escape).
"al"
<MentionPicker users={users} query="ay" onSelect={(u) => {}} onCancel={() => {}} />"zzz"
No matching users
<MentionPicker users={users} query="zzz" onSelect={(u) => {}} onCancel={() => {}} />