feat: add curriculum management admin dashboard with AI generation and draft approval workflows

src/lib/db.js

@@ -133,6 +133,24 @@ export async function updateSourceStatus(id, status, error = '') {
   return pb.collection('sources').update(id, { status, error });
 }
 
+export async function updateSourceProgress(id, progress) {
+  return pb.collection('sources').update(id, { progress });
+}
+
+/**
+ * Find sources stuck in 'processing' status — likely orphaned by a tab close.
+ * Sources older than 5 minutes in 'processing' state are considered stale.
+ */
+export async function getOrphanedSources() {
+  try {
+    const all = await pb.collection('sources').getFullList({
+      filter: 'status="processing"',
+    });
+    const fiveMinAgo = Date.now() - 5 * 60 * 1000;
+    return all.filter(s => new Date(s.updated || s.created).getTime() < fiveMinAgo);
+  } catch { return []; }
+}
+
 export async function deleteSource(id) {
   return pb.collection('sources').delete(id);
 }