fix(classes.collection): Fix closure issue in managed decorator so Class.collection/instance.collection resolve correctly

ts/classes.collection.ts

@@ -188,6 +188,42 @@ export function managed<TManager extends IManager>(managerArg?: TManager | TDela
       }
     };
 
+    // Closure fix: When class methods reference the class name (e.g., `User.collection`),
+    // they get the original constructor via closure, not the decorated class.
+    // Define collection/manager getters on the original constructor.
+    const getCollectionStatic = function(this: any) {
+      let dbArg: SmartdataDb;
+      if (!managerArg) {
+        dbArg = this.prototype.defaultManager.db;
+      } else if (managerArg['db']) {
+        dbArg = (managerArg as TManager).db;
+      } else {
+        dbArg = (managerArg as TDelayed<TManager>)().db;
+      }
+      return collectionFactory.getCollection(constructor.name, dbArg);
+    };
+    const getCollectionInstance = function(this: any) {
+      let dbArg: SmartdataDb;
+      if (!managerArg) {
+        dbArg = this.defaultManager.db;
+      } else if (managerArg['db']) {
+        dbArg = (managerArg as TManager).db;
+      } else {
+        dbArg = (managerArg as TDelayed<TManager>)().db;
+      }
+      return collectionFactory.getCollection(constructor.name, dbArg);
+    };
+    Object.defineProperty(constructor, 'collection', {
+      get: getCollectionStatic,
+      enumerable: false,
+      configurable: true
+    });
+    Object.defineProperty(constructor.prototype, 'collection', {
+      get: getCollectionInstance,
+      enumerable: false,
+      configurable: true
+    });
+
     // Initialize prototype properties from context.metadata (TC39 decorator metadata)
     // This ensures prototype properties are available before any instance is created
     const originalConstructor = value as any;