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/api/specs/channel/fbChannel.spec.js

@@ -0,0 +1,54 @@
+import fbChannel from '../../channel/fbChannel';
+import ApiClient from '../../ApiClient';
+
+describe('#FBChannel', () => {
+  it('creates correct instance', () => {
+    expect(fbChannel).toBeInstanceOf(ApiClient);
+    expect(fbChannel).toHaveProperty('get');
+    expect(fbChannel).toHaveProperty('show');
+    expect(fbChannel).toHaveProperty('create');
+    expect(fbChannel).toHaveProperty('update');
+    expect(fbChannel).toHaveProperty('delete');
+  });
+  describe('API calls', () => {
+    const originalAxios = window.axios;
+    const axiosMock = {
+      post: vi.fn(() => Promise.resolve()),
+      get: vi.fn(() => Promise.resolve()),
+      patch: vi.fn(() => Promise.resolve()),
+      delete: vi.fn(() => Promise.resolve()),
+    };
+
+    beforeEach(() => {
+      window.axios = axiosMock;
+    });
+
+    afterEach(() => {
+      window.axios = originalAxios;
+    });
+
+    it('#create', () => {
+      fbChannel.create({ omniauthToken: 'ASFM131CSF@#@$', appId: 'chatwoot' });
+      expect(axiosMock.post).toHaveBeenCalledWith(
+        '/api/v1/callbacks/register_facebook_page',
+        {
+          omniauthToken: 'ASFM131CSF@#@$',
+          appId: 'chatwoot',
+        }
+      );
+    });
+    it('#reauthorize', () => {
+      fbChannel.reauthorizeFacebookPage({
+        omniauthToken: 'ASFM131CSF@#@$',
+        inboxId: 1,
+      });
+      expect(axiosMock.post).toHaveBeenCalledWith(
+        '/api/v1/callbacks/reauthorize_page',
+        {
+          omniauth_token: 'ASFM131CSF@#@$',
+          inbox_id: 1,
+        }
+      );
+    });
+  });
+});

frontend/app/javascript/dashboard/api/specs/channel/twilioChannel.spec.js

@@ -0,0 +1,13 @@
+import twilioChannel from '../../channel/twilioChannel';
+import ApiClient from '../../ApiClient';
+
+describe('#twilioChannel', () => {
+  it('creates correct instance', () => {
+    expect(twilioChannel).toBeInstanceOf(ApiClient);
+    expect(twilioChannel).toHaveProperty('get');
+    expect(twilioChannel).toHaveProperty('show');
+    expect(twilioChannel).toHaveProperty('create');
+    expect(twilioChannel).toHaveProperty('update');
+    expect(twilioChannel).toHaveProperty('delete');
+  });
+});

frontend/app/javascript/dashboard/api/specs/channel/twitterClient.spec.js

@@ -0,0 +1,14 @@
+import twitterClient from '../../channel/twitterClient';
+import ApiClient from '../../ApiClient';
+
+describe('#TwitterClient', () => {
+  it('creates correct instance', () => {
+    expect(twitterClient).toBeInstanceOf(ApiClient);
+    expect(twitterClient).toHaveProperty('get');
+    expect(twitterClient).toHaveProperty('show');
+    expect(twitterClient).toHaveProperty('create');
+    expect(twitterClient).toHaveProperty('update');
+    expect(twitterClient).toHaveProperty('delete');
+    expect(twitterClient).toHaveProperty('generateAuthorization');
+  });
+});

frontend/app/javascript/dashboard/api/specs/channel/webChannel.spec.js

@@ -0,0 +1,13 @@
+import webChannelClient from '../../channel/webChannel';
+import ApiClient from '../../ApiClient';
+
+describe('#webChannelClient', () => {
+  it('creates correct instance', () => {
+    expect(webChannelClient).toBeInstanceOf(ApiClient);
+    expect(webChannelClient).toHaveProperty('get');
+    expect(webChannelClient).toHaveProperty('show');
+    expect(webChannelClient).toHaveProperty('create');
+    expect(webChannelClient).toHaveProperty('update');
+    expect(webChannelClient).toHaveProperty('delete');
+  });
+});