feat(ee): Add article translation via LLM in help center (#14136)

Adds the ability to translate help center articles to other languages using Captain's LLM infrastructure. Translated articles are created as drafts linked to the source article.

Fixes
https://linear.app/chatwoot/issue/CW-6901/translate-article-to-another-language

**How to test**

1. Navigate to Help Center → Articles for a portal with multiple locales
2. Click the three-dot menu on any article → "Translate"
3. Select a target language and category → click Translate
4. Switch to the target locale — the translated article appears as a
draft
5. Try translating the same article again — a warning shows the existing
translation with a link to open it in a new tab
6. Click "Overwrite and translate" to replace the existing translation


https://github.com/user-attachments/assets/1d2e991b-f0ac-403a-bcc1-2181b5731ea4

app/javascript/dashboard/components-next/HelpCenter/ArticleCard/ArticleCard.vue

@@ -9,6 +9,9 @@ import {
   ARTICLE_STATUSES,
 } from 'dashboard/helper/portalHelper';
 
+import { useMapGetter } from 'dashboard/composables/store.js';
+import { useConfig } from 'dashboard/composables/useConfig';
+import { FEATURE_FLAGS } from 'dashboard/featureFlags';
 import Icon from 'dashboard/components-next/icon/Icon.vue';
 import CardLayout from 'dashboard/components-next/CardLayout.vue';
 import DropdownMenu from 'dashboard/components-next/dropdown-menu/DropdownMenu.vue';
@@ -52,6 +55,21 @@ const { t } = useI18n();
 
 const [showActionsDropdown, toggleDropdown] = useToggle();
 
+const currentAccountId = useMapGetter('getCurrentAccountId');
+const isFeatureEnabledonAccount = useMapGetter(
+  'accounts/isFeatureEnabledonAccount'
+);
+const { isEnterprise } = useConfig();
+
+const isTranslationAvailable = computed(
+  () =>
+    isEnterprise &&
+    isFeatureEnabledonAccount.value(
+      currentAccountId.value,
+      FEATURE_FLAGS.CAPTAIN_TASKS
+    )
+);
+
 const articleMenuItems = computed(() => {
   const commonItems = Object.entries(ARTICLE_MENU_ITEMS).reduce(
     (acc, [key, item]) => {
@@ -64,7 +82,9 @@ const articleMenuItems = computed(() => {
   const statusItems = (
     ARTICLE_MENU_OPTIONS[props.status] ||
     ARTICLE_MENU_OPTIONS[ARTICLE_STATUSES.PUBLISHED]
-  ).map(key => commonItems[key]);
+  )
+    .filter(key => key !== 'translate' || isTranslationAvailable.value)
+    .map(key => commonItems[key]);
 
   return [...statusItems, commonItems.delete];
 });