feat(ui): phase 4 — promote modal polish, TODO complete

- Promote modal: colored glyphs, type names, hint descriptions per type
- Show truncated entry body in promote modal subtitle
- Mark all redesign phases complete in TODO.md

web/app.js

@@ -1091,6 +1091,10 @@
       modal.classList.add('visible');
       modal.dataset.entityId = id;
 
+      const sub = $('#promote-sub');
+      const label = (e.body || '').slice(0, 64) + ((e.body || '').length > 64 ? '…' : '');
+      sub.textContent = label;
+
       const suggested = detectCardType(e.body);
       $$('.type-btn').forEach(btn => {
         btn.classList.toggle('suggested', btn.dataset.type === suggested);