feat: implement curriculum service and learning automation infrastructure

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