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/store/modules/teams/mutations.js

@@ -0,0 +1,54 @@
+import {
+  SET_TEAM_UI_FLAG,
+  CLEAR_TEAMS,
+  SET_TEAMS,
+  SET_TEAM_ITEM,
+  EDIT_TEAM,
+  DELETE_TEAM,
+} from './types';
+
+export const mutations = {
+  [SET_TEAM_UI_FLAG]($state, data) {
+    $state.uiFlags = {
+      ...$state.uiFlags,
+      ...data,
+    };
+  },
+
+  [CLEAR_TEAMS]: $state => {
+    $state.records = {};
+  },
+
+  [SET_TEAMS]: ($state, data) => {
+    const updatedRecords = { ...$state.records };
+    data.forEach(team => {
+      updatedRecords[team.id] = {
+        ...(updatedRecords[team.id] || {}),
+        ...team,
+      };
+    });
+    $state.records = updatedRecords;
+  },
+
+  [SET_TEAM_ITEM]: ($state, data) => {
+    $state.records = {
+      ...$state.records,
+      [data.id]: {
+        ...($state.records[data.id] || {}),
+        ...data,
+      },
+    };
+  },
+
+  [EDIT_TEAM]: ($state, data) => {
+    $state.records = {
+      ...$state.records,
+      [data.id]: data,
+    };
+  },
+
+  [DELETE_TEAM]: ($state, teamId) => {
+    const { [teamId]: toDelete, ...records } = $state.records;
+    $state.records = records;
+  },
+};