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-next/CardLayout.vue

@@ -0,0 +1,37 @@
+<script setup>
+defineProps({
+  layout: {
+    type: String,
+    default: 'col',
+  },
+  selectable: {
+    type: Boolean,
+    default: false,
+  },
+});
+
+const emit = defineEmits(['click']);
+
+const handleClick = () => {
+  emit('click');
+};
+</script>
+
+<template>
+  <div
+    class="flex flex-col w-full outline-1 outline outline-n-container -outline-offset-1 group/cardLayout rounded-xl bg-n-solid-2"
+  >
+    <div
+      class="flex w-full gap-3 py-5"
+      :class="[
+        layout === 'col' ? 'flex-col' : 'flex-row justify-between items-center',
+        selectable ? 'px-10 py-6' : 'px-6',
+      ]"
+      @click="handleClick"
+    >
+      <slot />
+    </div>
+
+    <slot name="after" />
+  </div>
+</template>