Configure SPA mode for single-file deployment

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Co-Authored-By: Claude <noreply@anthropic.com>

nuxt.config.ts

@@ -1,5 +1,6 @@
 // https://nuxt.com/docs/api/configuration/nuxt-config
 export default defineNuxtConfig({
+  ssr: false,  // SPA 모드 활성화
   app: {
     head: {
       titleTemplate: '',