refactor: unify video mode detection into getVideoMode()

src/components/AccessibilitySettings.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { useGameStore } from '@/stores/gameStore'
 import { useI18n } from '@/composables/useI18n'
+import { getVideoMode } from '@engine/core/VideoManager'
 
 const store = useGameStore()
 const { t, currentLang, setLang } = useI18n()
@@ -19,7 +20,7 @@ const qualityOptions = [
   { key: '标清 (480P)', label: '标清 (480P)', speed: '需要 0.8 Mbps' },
 ]
 
-const isWeb = typeof window !== 'undefined' && !(window as any).__ELECTRON__
+const isWeb = getVideoMode() !== 'local'
 
 const langLabels: Record<string, string> = {
   zh: '中文',