feat: implement curriculum service and learning automation infrastructure

src/lib/curriculumService.js

@@ -87,9 +87,9 @@ export async function getCurriculumTopic(weekNumber, year) {
     return { topic: null, curriculumEntry: entry || null };
   }
 
-  // Resolve the topic from the topics collection
+  // Resolve the topic from the topics collection (ensure it is not excluded)
   const topics = await db.getTopics();
-  const topic = topics.find(t => t.id === entry.topic_id) || null;
+  const topic = topics.find(t => t.id === entry.topic_id && t.learning_relevance !== 'exclude') || null;
 
   return { topic, curriculumEntry: entry };
 }
@@ -178,8 +178,8 @@ export async function autoGenerateCurriculum(year) {
   const currYear = year ?? getCurriculumYear();
   const topics = await db.getTopics();
 
-  // Filter out 'fact' type topics — those are for the knowledge graph only
-  const learningTopics = topics.filter(t => t.type !== 'fact');
+  // Filter out 'fact' type topics and 'exclude' relevance topics
+  const learningTopics = topics.filter(t => t.type !== 'fact' && t.learning_relevance !== 'exclude');
 
   const weeks = [];
   const reviewWeeks = [13, 26, 39, 52];

src/lib/learningService.js

@@ -56,13 +56,15 @@ export async function getAssignedTopic(userId, weekNumber) {
   // Try curriculum first
   try {
     const { topic } = await getCurriculumTopic(weekNumber);
-    if (topic) return topic;
+    if (topic && topic.learning_relevance !== 'exclude') 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();
+  const allTopics = await db.getTopics();
+  // Filter out 'fact' type topics and 'exclude' relevance topics
+  const topics = allTopics.filter(t => t.type !== 'fact' && t.learning_relevance !== 'exclude');
   if (!topics || topics.length === 0) return null;
 
   const str = `${userId}:${weekNumber}`;

src/lib/testService.js

@@ -8,7 +8,8 @@ Always write in clear, professional English.
 ALWAYS return valid JSON only — no markdown code blocks, no extra text.`;
 
 async function selectTestTopics(userId, weekNumber) {
-  const topics = await db.getTopics();
+  const allTopics = await db.getTopics();
+  const topics = allTopics.filter(t => t.type !== 'fact' && t.learning_relevance !== 'exclude');
   if (!topics || topics.length === 0) return { primaryTopic: null, reviewTopics: [], isReviewWeek: false };
 
   // Try curriculum-based selection first