fix: Widget now shows articles based on correct locale (#12316)

# Pull Request Template

## Description

This PR fixes an issue (CW-5529) where articles displayed on the widget
were not respecting the current locale set in the URL (e.g., `/ar` was
showing English articles).

The root cause was that the article queries in the
`_featured_articles.html.erb` and `_uncategorized-block.html.erb` view
templates were missing locale filtering.

The fix involves adding `locale: @locale` to the `articles.where`
clauses in these templates to ensure that only articles matching the
current portal locale are displayed.

Fixes #CW-5529

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update

## How Has This Been Tested?

The changes were verified against existing test cases that confirm the
expected behavior for locale-specific article filtering. Specifically,
tests for the articles controller's `index` action and article count by
locale were reviewed, which align with the implemented fixes.

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works (N/A, relied on existing tests)
- [ ] New and existing unit tests pass locally with my changes (Unable
to run tests in this environment)
- [ ] Any dependent changes have been merged and published in downstream
modules

---
Linear Issue:
[CW-5529](https://linear.app/chatwoot/issue/CW-5529/articles-from-the-correct-locale-is-not-shown-on-the-widget)

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---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/widget/components/pageComponents/Home/Article/ArticleContainer.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { computed, onMounted } from 'vue';
+import { computed, onMounted, watch } from 'vue';
 import ArticleBlock from 'widget/components/pageComponents/Home/Article/ArticleBlock.vue';
 import ArticleCardSkeletonLoader from 'widget/components/pageComponents/Home/Article/SkeletonLoader.vue';
 import { useI18n } from 'vue-i18n';
@@ -26,7 +26,7 @@ const locale = computed(() => {
 });
 
 const fetchArticles = () => {
-  if (portal.value && !popularArticles.value.length) {
+  if (portal.value && locale.value) {
     store.dispatch('article/fetch', {
       slug: portal.value.slug,
       locale: locale.value,
@@ -60,6 +60,14 @@ const hasArticles = computed(
     !!popularArticles.value.length &&
     !!locale.value
 );
+
+// Watch for locale changes and refetch articles
+watch(locale, (newLocale, oldLocale) => {
+  if (newLocale && newLocale !== oldLocale) {
+    fetchArticles();
+  }
+});
+
 onMounted(() => fetchArticles());
 </script>