When focus moves to the emoji picker the input loses focus, making
selectionStart/selectionEnd unreliable. Replace the cursor-tracking
insertion with a simple functional state updater that always appends
the emoji to the end — reliable and appropriate for a short status field.
Also removes the now-unused inputRef and useRef import.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jared
90cb70c128