feat: implement 52-week annual curriculum system with admin management and automated topic progression

src/lib/db.js

@@ -244,3 +244,67 @@ export async function setSetting(key, value) {
     return pb.collection('settings').create({ key, value: String(value) });
   }
 }
+
+// ── Curriculum ────────────────────────────────────────────────────────────────
+
+export async function getCurriculum(year) {
+  try {
+    return await pb.collection('curriculum').getFullList({
+      filter: `year=${year}`,
+      sort: 'week_number',
+    });
+  } catch { return []; }
+}
+
+export async function getCurriculumWeek(year, weekNumber) {
+  try {
+    return await pb.collection('curriculum').getFirstListItem(
+      `year=${year} && week_number=${weekNumber}`
+    );
+  } catch { return null; }
+}
+
+export async function setCurriculumWeek(year, weekNumber, data) {
+  try {
+    const r = await pb.collection('curriculum').getFirstListItem(
+      `year=${year} && week_number=${weekNumber}`
+    );
+    return pb.collection('curriculum').update(r.id, data);
+  } catch {
+    return pb.collection('curriculum').create({
+      year,
+      week_number: weekNumber,
+      ...data,
+    });
+  }
+}
+
+export async function deleteCurriculumWeek(year, weekNumber) {
+  try {
+    const r = await pb.collection('curriculum').getFirstListItem(
+      `year=${year} && week_number=${weekNumber}`
+    );
+    return pb.collection('curriculum').delete(r.id);
+  } catch { /* nothing to delete */ }
+}
+
+export async function bulkSetCurriculum(year, weeks) {
+  // Delete all existing entries for this year first
+  const existing = await getCurriculum(year);
+  await Promise.all(
+    existing.map(r => pb.collection('curriculum').delete(r.id, { requestKey: null }))
+  );
+  // Create all new entries
+  return Promise.all(
+    weeks.map(w => pb.collection('curriculum').create({
+      year,
+      week_number: w.week_number,
+      topic_id: w.topic_id || '',
+      theme: w.theme || '',
+      quarter: w.quarter || Math.ceil(w.week_number / 13),
+      is_review_week: w.is_review_week || false,
+      sort_order: w.sort_order ?? w.week_number,
+    }, { requestKey: null }))
+  );
+}
+