feat(review): View prompt + Call 2 declared attrs, Create-desc gate

Shared assemble_call2 for GET .../call2/prompt and POST call2 (seed +
DECLARED ATTRIBUTES + dimension fact + brand/geo; photo slots without
base64). Create desc disabled until content LLM + title/short + species +
wood cats/primary + edge + ≥1 figure + grade + moisture + price; show
missing. figure_term_ids required for ready. Moisture defaults to Kiln
dried (kd). Pin snl / liveedge in wood-cat UI. Ready-on-change via
MultiSelect onCommit.

frontend/src/api/slabs.ts

@@ -379,6 +379,26 @@ export function inferContent(slabId: string): Promise<Call2Result> {
   }).then((r) => parse<Call2Result>(r));
 }
 
+/** View prompt: assembled Call 2 text + photo slots (no base64, no model call). */
+export interface Call2PromptPhoto {
+  seq: number;
+  id: string;
+  bytes: number;
+  long_edge_px: number | null;
+}
+
+export interface Call2Prompt {
+  text: string;
+  photos: Call2PromptPhoto[];
+  prompt_revision_id: number | null;
+}
+
+export function getCall2Prompt(slabId: string): Promise<Call2Prompt> {
+  return fetch(`/api/v1/slabs/${encodeURIComponent(slabId)}/inference/call2/prompt`).then((r) =>
+    parse<Call2Prompt>(r),
+  );
+}
+
 // ---------------------------------------------------------------------------
 // Taxonomy (METADATA-5/15/30; only legal picker options)
 // ---------------------------------------------------------------------------