Vendor Chatwoot Vue 3 frontend into frontend/

Copy the Chatwoot (v4.14.0) frontend runnable subset into frontend/ for
customization:
- app/javascript/ (Vue SPA: dashboard, widget, sdk, portal, superadmin)
- app/views/ (ERB templates for vite-plugin-ruby entrypoint resolution)
- app/helpers/, app/assets/ (Rails view helpers, static assets)
- enterprise/ (Enterprise edition frontend overlay)
- config/vite.json, vite.config.ts, bin/vite (Vite-Rails toolchain)
- package.json, pnpm-lock.yaml, tailwind/postcss/eslint configs
- Gemfile, Gemfile.lock (vite_rails gem for bin/vite binstub)

Excluded Rails backend: controllers, models, services, jobs, mailers,
policies, db, lib, spec, public, node_modules.

Update references to the new frontend location:
- .gitignore: exclude frontend build artifacts (node_modules, tmp, packs),
  keep frontend/bin/ and frontend/vendor/ via negation
- backend/scripts/parity_frontend_smoke.sh: CHATWOOT_DIR default
  reference/chatwoot -> ../frontend
- backend/scripts/parity_frontend_browser_smoke.mjs: same default update
- AGENTS.md: add frontend section with Rails/Vite coupling notes
- README: architecture tree includes frontend/

frontend/app/javascript/dashboard/components/app/PendingEmailVerificationBanner.vue

@@ -0,0 +1,42 @@
+<script>
+import Banner from 'dashboard/components/ui/Banner.vue';
+import { mapGetters } from 'vuex';
+import { useAlert } from 'dashboard/composables';
+
+export default {
+  components: { Banner },
+  computed: {
+    ...mapGetters({
+      currentUser: 'getCurrentUser',
+    }),
+    bannerMessage() {
+      return this.$t('APP_GLOBAL.EMAIL_VERIFICATION_PENDING');
+    },
+    actionButtonMessage() {
+      return this.$t('APP_GLOBAL.RESEND_VERIFICATION_MAIL');
+    },
+    shouldShowBanner() {
+      return !this.currentUser.confirmed;
+    },
+  },
+  methods: {
+    resendVerificationEmail() {
+      this.$store.dispatch('resendConfirmation');
+      useAlert(this.$t('APP_GLOBAL.EMAIL_VERIFICATION_SENT'));
+    },
+  },
+};
+</script>
+
+<!-- eslint-disable-next-line vue/no-root-v-if -->
+<template>
+  <Banner
+    v-if="shouldShowBanner"
+    color-scheme="alert"
+    :banner-message="bannerMessage"
+    :action-button-label="actionButtonMessage"
+    action-button-icon="i-lucide-mail"
+    has-action-button
+    @primary-action="resendVerificationEmail"
+  />
+</template>