chore: Improve pagination with compact number formatting and pluralization (#12921)

# Pull Request Template

## Description

This PR enhances the pagination component with standardized number
formatting and improved i18n handling.

**Includes:**

* Added `formatCompactNumber` and `formatFullNumber` helpers using
`Intl.NumberFormat`.
    * `< 1,000`: show exact value (e.g., `999`)
    * `1,000–999,999`: show compact format (`1k`, `1k+`)
    * `1,000,000+`: show in millions with one decimal (e.g., `1.2M`)
* Updated `PaginationFooter` to use the new formatters for all displayed
numbers.
  * Added proper pluralization to pagination i18n strings.

Fixes
https://linear.app/chatwoot/issue/CW-5999/better-display-of-numbers

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

### Screenshoots

**Before**
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/9fcf8baa-ae32-4a8a-85b0-24002fd863db"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/3d7138b7-133e-4ae6-b55f-67eff73ff1cc"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/1bbf7070-0681-492d-9308-a33874052d28"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/4e441672-26aa-4e66-965e-9edb807eaa72"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/11836702-1b74-4834-8932-31c20adc2db8"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/d37971bc-09af-4238-8601-ccc2ae69dbe7"
/>


**After**
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/8eaf2a23-beea-486b-b555-37f8b36ab904"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/f44f508a-e39d-45cb-afd8-98deb26920f8"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/d3b90711-bd7e-44ee-8bb3-48e45b799420"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/30dca6cd-f2be-4dcb-8596-924326ebf8c0"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/58896699-1f05-46c9-88cb-908318e71476"
/>
<img width="991" height="69" alt="image"
src="https://github.com/user-attachments/assets/ea0d91b0-077b-4d72-81a7-d38d17742da6"
/>




## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] 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
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/components-next/pagination/PaginationFooter.vue

@@ -1,6 +1,7 @@
 <script setup>
 import { computed } from 'vue';
 import { useI18n } from 'vue-i18n';
+import { useNumberFormatter } from 'shared/composables/useNumberFormatter';
 
 import Button from 'dashboard/components-next/button/Button.vue';
 
@@ -24,6 +25,7 @@ const props = defineProps({
 });
 const emit = defineEmits(['update:currentPage']);
 const { t } = useI18n();
+const { formatCompactNumber, formatFullNumber } = useNumberFormatter();
 
 const totalPages = computed(() =>
   Math.ceil(props.totalItems / props.itemsPerPage)
@@ -43,21 +45,27 @@ const changePage = newPage => {
 };
 
 const currentPageInformation = computed(() => {
+  const translationKey = props.currentPageInfo || 'PAGINATION_FOOTER.SHOWING';
   return t(
-    props.currentPageInfo ? props.currentPageInfo : 'PAGINATION_FOOTER.SHOWING',
+    translationKey,
     {
-      startItem: startItem.value,
-      endItem: endItem.value,
-      totalItems: props.totalItems,
-    }
+      startItem: formatFullNumber(startItem.value),
+      endItem: formatFullNumber(endItem.value),
+      totalItems: formatCompactNumber(props.totalItems),
+    },
+    Number(props.totalItems)
   );
 });
 
 const pageInfo = computed(() => {
-  return t('PAGINATION_FOOTER.CURRENT_PAGE_INFO', {
-    currentPage: '',
-    totalPages: totalPages.value,
-  });
+  return t(
+    'PAGINATION_FOOTER.CURRENT_PAGE_INFO',
+    {
+      currentPage: '',
+      totalPages: formatCompactNumber(totalPages.value),
+    },
+    Number(totalPages.value)
+  );
 });
 </script>
 
@@ -91,9 +99,11 @@ const pageInfo = computed(() => {
       />
       <div class="inline-flex items-center gap-2 text-sm text-n-slate-11">
         <span class="px-3 tabular-nums py-0.5 bg-n-alpha-black2 rounded-md">
-          {{ currentPage }}
+          {{ formatFullNumber(currentPage) }}
+        </span>
+        <span class="truncate">
+          {{ pageInfo }}
         </span>
-        <span class="truncate">{{ pageInfo }}</span>
       </div>
       <Button
         icon="i-lucide-chevron-right"