feat: implement micro-learning system with content delivery components, completion tracking hooks, and database schema migrations

pb_migrations/1780800001_deleted_legacy_collections.js

@@ -0,0 +1,23 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((app) => {
+  const collectionsToDrop = [
+    "learn_progress",
+    "quiz_banks",
+    "quiz_cache",
+    "quiz_results"
+  ];
+
+  for (const name of collectionsToDrop) {
+    try {
+      const collection = app.findCollectionByNameOrId(name);
+      if (collection) {
+        app.delete(collection);
+      }
+    } catch (err) {
+      // Ignore if not found
+    }
+  }
+}, (app) => {
+  // Downgrade would normally recreate these, but we omit it here for simplicity
+  // since they are deprecated.
+})