fix(review): Create title no silent fail; gate enables content LLM

Create title used to look enabled while review echoed a pre-typed title when
species/primary were missing from taxonomy (no error). Persist wood cats before
the deterministic build, return title_built / title_build_missing from review,
and surface a Create-title nudge like Create desc.

WooSetupGate now turns on content_llm_enabled when inference URL+key are set
(Call 2 / Create desc). Call 1 stays out. Create-desc gate also requires
inference URL+key so empty Settings show a clear missing list.

backend/review.py

@@ -184,12 +184,23 @@ async def review_slab(slab_id: str, payload: dict[str, Any] | None = None) -> di
     # they are produced by the deterministic build below, not persisted from the
     # payload (so the review POST can't clobber the owner's Create workflow).
     cats, terms = _taxonomy_lookup(conn)
-    primary_id = payload.get("primary_wood_category_id")
+
+    def _as_cat_id(v):
+        if v is None or v == "":
+            return None
+        try:
+            return int(v)
+        except (TypeError, ValueError):
+            return None
+
+    primary_id = _as_cat_id(payload.get("primary_wood_category_id"))
     wood_cats = slab.get("wood_category_ids") or []
     if not primary_id:
-        primary_id = wood_cats[0] if wood_cats else None
-    primary_leaf = cats.get(primary_id, {}) if primary_id else {}
-    species_name = cats.get(slab.get("species_id"), {}).get("name", "") if slab.get("species_id") else ""
+        primary_id = _as_cat_id(wood_cats[0]) if wood_cats else None
+    # Taxonomy rows use integer PKs; coerce so string JSON ids still resolve.
+    primary_leaf = cats.get(primary_id, {}) if primary_id is not None else {}
+    species_id = _as_cat_id(slab.get("species_id"))
+    species_name = cats.get(species_id, {}).get("name", "") if species_id is not None else ""
     figure_term_ids = slab.get("figure_term_ids") or []
     figure = terms.get(figure_term_ids[0], {}).get("name") if figure_term_ids else None
 
@@ -210,14 +221,22 @@ async def review_slab(slab_id: str, payload: dict[str, Any] | None = None) -> di
     # Deterministic title / short_description, re-derived from the current
     # metadata on every review (the Create button's source of truth).
     # #98: pass synced terms so Live Edge comes from the edge term, not any id.
+    # title_built tells the client whether the Create-title path actually ran
+    # (vs echoing a pre-typed title when species/primary are missing from taxonomy).
+    title_build_missing: list[str] = []
+    if not species_name:
+        title_build_missing.append("species")
+    if not primary_leaf:
+        title_build_missing.append("primary_wood_category")
+    title_built = not title_build_missing
     title = (
         build_title(slab, figure, species_name, primary_leaf, terms)
-        if (primary_leaf and species_name)
+        if title_built
         else slab.get("title") or None
     )
     short_desc = (
         build_short_description(slab, figure, species_name, primary_leaf, terms)
-        if (primary_leaf and species_name)
+        if title_built
         else slab.get("short_description") or None
     )
 
@@ -227,6 +246,8 @@ async def review_slab(slab_id: str, payload: dict[str, Any] | None = None) -> di
         "ready": ready, "missing": missing, "title": title, "short_description": short_desc,
         "price": price, "price_suggestion": price_suggestion(conn, slab),
         "primary_wood_category_id": primary_id,
+        "title_built": title_built,
+        "title_build_missing": title_build_missing,
     }