feat: micro-learning module with seed data

- Add Course and Module models to Prisma schema
- Create seed-learn.json with Daily Fiqh for Beginners (5 modules)
- Create seed-learn.js with Hermes patch (strip id/courseId from create)
- Add /learn page with course listing
- Add /learn/[courseSlug]/[moduleId] page with content + quiz
- Quiz data stored as JSON string per module
- Content rendered as markdown with Key Concept, Details, Reflection, Action Step sections

TODO:
- Add audio player component for listen toggle
- Add progress tracking per user
- Add actual quiz scoring/validation
- Connect to TTS pipeline for audio generation

postcss.config.mjs

@@ -0,0 +1,6 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+}
+export default config