Canvas extension issue when using built-in app zoom

### Short summary

Canvas extension offset issue when using built-in app zoom

### Affected version or release

v1.0.24

### Installation context

App installed on MacOS 15.7.7

### What happened?

When a canvas extension is loaded, any zoom change other than default render the app unusable due to the webview of the canvas extension not applying the zoom and getting offset inside the GH app window, see:

### Steps to reproduce

1. Load any canvas extension using the webview
2. zoom in/out in the app using ctrl +/-

### Expected behavior

- canvas extension is also affected by the zoom, and follows the layout as expected

### Additional context

_No response_

Riproduci il problema su macOS 15.7.7 con v1.0.24 caricando un’estensione canvas nel webview e modificando lo zoom dell’app con Ctrl+/-. Esamina la gestione dello zoom e del layout del webview dell’estensione canvas; il lavoro è completato quando l’estensione segue lo zoom dell’app senza risultare spostata o inutilizzabile.

Scritto dal modello di indicizzazione a partire dal testo della issue.