Offline app: Simulator new functions fail to load after adding Jacdac extension

Describe the bug
In the micro:bit offline app, simulator new functions fail to load after adding the Jacdac extension, displaying a "File not found. :(" error in the simulator area.

Steps to reproduce the behavior:

1. Download and open the micro:bit offline app: Microsoft MakeCode Offline App
2. Create a new project.
3. Click Extensions and search for Jacdac.
4. Select the Jacdac extension to add it to the project.
5. Observe the new functions section at the bottom of the simulator.

Actual behavior
The simulator fails to load the new functions and displays the error message: “File not found. :(”.

Expected behavior
The simulator new functions should load and render correctly after adding the Jacdac extension, consistent with the behavior in the online editor.

Screenshots

Additional context
1.OS: Windows 11 25H2
2.makecode.microbit.org version: 8.1.27
3.Microsoft MakeCode version: 12.3.22