- Render SpawnHud last in the tail so its un-budgeted (dynamic) width can
only truncate itself, never push budgeted segments past leftWidth.
- Precompute kaomoji/emoji frame widths once at module load instead of
rescanning FACES/EMOJI_FRAMES on every status render.
- Correct the tail-priority comment to match the actual fits() order
(bar, duration, compressions, voice, session count, bg, cost).