refactor: add facebook bootstrap candidate extraction

packages/core/src/scrapers/facebook.ts

@@ -408,6 +408,30 @@ export function classifyFacebookResponse(
   return { kind: "unknown" as const, authGated: false, unavailable: false };
 }
 
+export function extractFacebookBootstrapCandidates(
+  htmlString: HTMLString,
+): Record<string, unknown>[] {
+  const { document } = parseHTML(htmlString);
+  const scripts = document.querySelectorAll("script");
+  const candidates: Record<string, unknown>[] = [];
+
+  for (const script of Array.from(scripts) as HTMLScriptElement[]) {
+    const scriptText = script.textContent?.trim();
+    if (!scriptText) continue;
+
+    try {
+      const parsed = JSON.parse(scriptText);
+      if (isRecord(parsed)) {
+        candidates.push(parsed as Record<string, unknown>);
+      }
+    } catch {
+      // skip non-JSON script bodies
+    }
+  }
+
+  return candidates;
+}
+
 /**
   Extract marketplace search data from Facebook page script tags
 */