fix(review): slug-scoped tags, decode names, drop fig picker & AI labels

- Taxonomy sync keeps fig-/feat- by slug (hyphen), not name; HTML-unescape names
- Review: remove AI assist labels; Features picker for feat-*; derive fig_tag_ids
  from Figure term names (casefold match, no bridges); decodeName on display
- Unit tests for scoped_tags, fig match, Review UI contract; docs slug wording

frontend/src/create/decodeName.ts

@@ -0,0 +1,9 @@
+/** Decode common HTML entities Woo puts in taxonomy display names. */
+export function decodeName(name: string): string {
+  return name
+    .replace(/&/g, '&')
+    .replace(/&lt;/g, '<')
+    .replace(/&gt;/g, '>')
+    .replace(/&quot;/g, '"')
+    .replace(/&#39;/g, "'");
+}