feat(web): migrate CRM screens to Ant Design Vue with central theme

Adopt ant-design-vue and a shared antdTheme for leads, pipeline, invoices, and shared form controls under strict single-page governance.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/App.vue

@@ -1,7 +1,17 @@
 <script setup lang="ts">
 import { RouterView } from 'vue-router';
+import {
+  ConfigProvider as AConfigProvider,
+  StyleProvider as AStyleProvider,
+} from 'ant-design-vue';
+import faIR from 'ant-design-vue/es/locale/fa_IR';
+import { antdTheme } from '@/theme/antdTheme';
 </script>
 
 <template>
-  <RouterView />
+  <a-style-provider hash-priority="high">
+    <a-config-provider direction="rtl" :locale="faIR" :theme="antdTheme">
+      <RouterView />
+    </a-config-provider>
+  </a-style-provider>
 </template>