feat(editor): wire business panel, section commands and Layers follow-ups

- GuidedStyles classifies Opening Hours / Call Bar / Reviews / Booking to
  BusinessStylePanel (#60) and shows a Regenerate button in the type
  header, hidden when edit.regenerate-section's when() is false (#58)
- LayersPanel TYPE_ICONS for the four business blocks (FA 4.7) (#60)
- Context menu entries 'Save as section…' and 'Regenerate this section'
  invoke site.save-as-section / edit.regenerate-section (#52, #58)
- commands: useCommandState(id) hook (registered/enabled/run)
- Layers: keep dropEffect 'move' on refused targets so drop fires and the
  refusal notice shows; renaming to the default name stores no
  custom.label (#47)

Refs #60
Refs #58
Refs #52
Refs #47

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

craft/src/styles/editor.css

@@ -3324,3 +3324,14 @@ body {
 }
 .section-lib-chip-global i { margin-right: 3px; }
 .section-lib-usage { display: block; font-size: 11px; color: var(--color-text-muted); }
+
+/* #followups -- integration follow-ups (#58 Regenerate button in the type header) */
+.guided-regenerate-btn {
+  display: inline-flex; align-items: center; gap: 4px;
+  padding: 4px 8px; font-size: 11px; font-weight: 600;
+  color: var(--color-text); background: transparent;
+  border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer;
+}
+.guided-regenerate-btn:hover { background: var(--color-bg-hover); }
+.guided-regenerate-btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 1px; }
+/* /#followups */