Update Jest module mapper

Author: cliffhall

package.json

@@ -97,5 +97,12 @@
   },
   "engines": {
     "node": ">=20"
+  },
+  "jest": {
+    "preset": "ts-jest",
+    "testEnvironment": "jsdom",
+    "moduleNameMapper": {
+      "^(\\.{1,2}/.*)\\.js$": "$1"
+    }
   }
 }