chore(vben5-platform): update `preferences.ts`

- Set `defaultHomePath` to `/workspace`
- Set Theme following system
- Set Theme radius  to `0.25`
- Hide the default notification widget

apps/vben5/apps/app-antd/src/preferences.ts

@@ -9,7 +9,15 @@ export const overridesPreferences = defineOverridesPreferences({
   // overrides
   app: {
     accessMode: 'backend',
+    defaultHomePath: '/workspace',
     enableRefreshToken: true,
     name: import.meta.env.VITE_APP_TITLE,
   },
+  theme: {
+    mode: 'auto',
+    radius: '0.25',
+  },
+  widget: {
+    notification: false,
+  },
 });