fix: 更新应用名称为“Riwsan 瑞讯”，确保一致性

src/views/pwa/download.vue

@@ -10,7 +10,7 @@ const { t } = useI18n();
 const { canInstall, isInstalled, install, isIOS, isIOSSafari } = usePWAInstall();
 const platform = usePlatform();
 
-const appName = "Riwa";
+const appName = "Riwsan 瑞讯";
 const isLoading = ref(false);
 
 // 调试日志
@@ -99,7 +99,7 @@ watch(isInstalled, (installed) => {
       <div class="flex flex-col items-center min-h-full px-6 py-12">
         <!-- App Logo & Name -->
         <div class="flex flex-col items-center mb-8">
-          <img alt="RWA平台" src="/favicon.svg" class="w-16 h-16">
+          <img alt="Riwsan 瑞讯" src="/favicon.svg" class="w-16 h-16">
           <h1 class="text-3xl font-bold mb-2">
             {{ appName }}
           </h1>