FIX - harden phone stability and app controls (#28)

frontend/src/utils/preferences.test.ts

@@ -2,11 +2,16 @@ import { describe, expect, it } from 'vitest'
 import type { LaunchablePhoneAppId } from '@/types/apps'
 import {
   DEFAULT_PHONE_PREFERENCES,
+  PHONE_SCALE_STEP,
   PHONE_SETUP_LAST_STEP,
   parsePhonePreferences,
   WALLPAPER_IDS,
 } from './preferences'
 describe('preferences', () => {
+  it('allows one-percent phone scale adjustments', () => {
+    expect(PHONE_SCALE_STEP).toBe(1)
+  })
+
   it('starts Setup Assistant for a phone without saved settings', () => {
     const value = parsePhonePreferences(null)
 

frontend/src/utils/preferences.ts

@@ -38,7 +38,7 @@ export const WALLPAPER_IDS = [
 ] as const
 export const PHONE_SCALE_MIN = 75
 export const PHONE_SCALE_MAX = 150
-export const PHONE_SCALE_STEP = 5
+export const PHONE_SCALE_STEP = 1
 export const PHONE_SETUP_LAST_STEP = 9
 
 export type AppearanceMode = (typeof APPEARANCE_MODE_IDS)[number]