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

src/lib/learningService.js

@@ -1,5 +1,6 @@
 import { anthropicApi } from './api';
 import * as db from './db';
+import { getCurriculumTopic, getCurriculumYear } from './curriculumService';
 
 const CONTENT_GENERATION_SYSTEM = `You are an expert learning content writer for Respellion, an internal IT company.
 You write training material for employees based on knowledge topics.
@@ -46,7 +47,21 @@ const CONTENT_SCHEMA_ALL = `{
   "infographic": ${CONTENT_SCHEMA_INFOGRAPHIC.replace(/^\{|\}$/g, '').trim()}
 }`;
 
+/**
+ * Get the assigned topic for a given week.
+ * Curriculum-first: checks the curriculum collection for the current year.
+ * Falls back to hash-based assignment if no curriculum is configured.
+ */
 export async function getAssignedTopic(userId, weekNumber) {
+  // Try curriculum first
+  try {
+    const { topic } = await getCurriculumTopic(weekNumber);
+    if (topic) return topic;
+  } catch (e) {
+    console.warn('[Learn] Curriculum lookup failed, falling back to hash:', e.message);
+  }
+
+  // Fallback: hash-based assignment (backwards compatible)
   const topics = await db.getTopics();
   if (!topics || topics.length === 0) return null;