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/views/platform/api/v1/accounts/create.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/account', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/accounts/index.json.jbuilder

@@ -0,0 +1,3 @@
+json.array! @resources do |account|
+  json.partial! 'platform/api/v1/models/account', formats: [:json], resource: account
+end

frontend/app/views/platform/api/v1/accounts/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/account', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/accounts/update.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/account', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/agent_bots/avatar.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/agent_bot', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/agent_bots/create.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/agent_bot', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/agent_bots/index.json.jbuilder

@@ -0,0 +1,6 @@
+json.array! @resources do |resource|
+  bot = resource.permissible
+  next if bot.nil?
+
+  json.partial! 'platform/api/v1/models/agent_bot', formats: [:json], resource: bot
+end

frontend/app/views/platform/api/v1/agent_bots/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/agent_bot', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/agent_bots/update.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/agent_bot', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/models/_account.json.jbuilder

@@ -0,0 +1,9 @@
+json.id resource.id
+json.name resource.name
+json.locale resource.locale
+json.domain resource.domain
+json.support_email resource.support_email
+json.features resource.enabled_features
+json.custom_attributes resource.custom_attributes
+json.limits resource.limits
+json.status resource.status

frontend/app/views/platform/api/v1/models/_agent_bot.json.jbuilder

@@ -0,0 +1,6 @@
+json.id resource.id
+json.name resource.name
+json.description resource.description
+json.outgoing_url resource.outgoing_url
+json.account_id resource.account_id
+json.access_token resource.access_token.token

frontend/app/views/platform/api/v1/models/_user.json.jbuilder

@@ -0,0 +1,24 @@
+json.access_token resource.access_token.token
+json.account_id resource.active_account_user&.account_id
+json.available_name resource.available_name
+json.avatar_url resource.avatar_url
+json.confirmed resource.confirmed?
+json.display_name resource.display_name
+json.message_signature resource.message_signature
+json.email resource.email
+json.id resource.id
+json.name resource.name
+json.provider resource.provider
+json.pubsub_token resource.pubsub_token
+json.custom_attributes resource.custom_attributes if resource.custom_attributes.present?
+json.role resource.active_account_user&.role
+json.ui_settings resource.ui_settings
+json.uid resource.uid
+json.accounts do
+  json.array! resource.account_users do |account_user|
+    json.id account_user.account_id
+    json.name account_user.account.name
+    json.active_at account_user.active_at
+    json.role account_user.role
+  end
+end

frontend/app/views/platform/api/v1/users/create.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/user', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/users/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/user', formats: [:json], resource: @resource

frontend/app/views/platform/api/v1/users/token.json.jbuilder

@@ -0,0 +1,9 @@
+json.access_token @resource.access_token.token
+json.expiry nil
+json.user do
+  json.id @resource.id
+  json.name @resource.name
+  json.display_name @resource.display_name
+  json.email @resource.email
+  json.pubsub_token @resource.pubsub_token
+end

frontend/app/views/platform/api/v1/users/update.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'platform/api/v1/models/user', formats: [:json], resource: @resource