chore: migrate legacy pages and utilities to nuxt

frontend_nuxt/pages/google-callback.vue

@@ -0,0 +1,27 @@
+<template>
+  <CallbackPage />
+</template>
+
+<script>
+import CallbackPage from '../components/CallbackPage.vue'
+import { googleAuthWithToken } from '../utils/google'
+
+export default {
+  name: 'GoogleCallbackPageView',
+  components: { CallbackPage },
+  async mounted() {
+    const hash = new URLSearchParams(window.location.hash.substring(1))
+    const idToken = hash.get('id_token')
+    if (idToken) {
+      await googleAuthWithToken(idToken, () => {
+        this.$router.push('/')
+      }, token => {
+        this.$router.push('/signup-reason?token=' + token)
+      })
+    } else {
+      this.$router.push('/login')
+    }
+  }
+}
+</script>
+