feat: Show conversation count for filters/folders in header (#11698)

# Pull Request Template

## Description

Fixes
https://linear.app/chatwoot/issue/CW-4467/show-the-conversation-count-at-the-top-for-filters-and-folders

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?

### Screenshots
<img width="637" alt="image"
src="https://github.com/user-attachments/assets/8c167130-f41a-45ce-a70e-bba99d74050f"
/>
<img width="637" alt="image"
src="https://github.com/user-attachments/assets/769bc488-e4d9-40fb-9760-62434761617b"
/>




## 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
- [ ] 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/ChatListHeader.vue

@@ -2,6 +2,7 @@
 import { computed } from 'vue';
 import { useUISettings } from 'dashboard/composables/useUISettings';
 import { useMapGetter } from 'dashboard/composables/store.js';
+import { formatNumber } from '@chatwoot/utils';
 import wootConstants from 'dashboard/constants/globals';
 import { FEATURE_FLAGS } from 'dashboard/featureFlags';
 
@@ -10,26 +11,13 @@ import SwitchLayout from 'dashboard/routes/dashboard/conversation/search/SwitchL
 import NextButton from 'dashboard/components-next/button/Button.vue';
 
 const props = defineProps({
-  pageTitle: {
-    type: String,
-    required: true,
-  },
-  hasAppliedFilters: {
-    type: Boolean,
-    required: true,
-  },
-  hasActiveFolders: {
-    type: Boolean,
-    required: true,
-  },
-  activeStatus: {
-    type: String,
-    required: true,
-  },
-  isOnExpandedLayout: {
-    type: Boolean,
-    required: true,
-  },
+  pageTitle: { type: String, required: true },
+  hasAppliedFilters: { type: Boolean, required: true },
+  hasActiveFolders: { type: Boolean, required: true },
+  activeStatus: { type: String, required: true },
+  isOnExpandedLayout: { type: Boolean, required: true },
+  conversationStats: { type: Object, required: true },
+  isListLoading: { type: Boolean, required: true },
 });
 
 const emit = defineEmits([
@@ -62,6 +50,9 @@ const showV4View = computed(() => {
   );
 });
 
+const allCount = computed(() => props.conversationStats?.allCount || 0);
+const formattedAllCount = computed(() => formatNumber(allCount.value));
+
 const toggleConversationLayout = () => {
   const { LAYOUT_TYPES } = wootConstants;
   const {
@@ -92,6 +83,15 @@ const toggleConversationLayout = () => {
       >
         {{ pageTitle }}
       </h1>
+      <span
+        v-if="
+          allCount > 0 && hasAppliedFiltersOrActiveFolders && !isListLoading
+        "
+        class="px-2 py-1 my-0.5 mx-1 rounded-md capitalize bg-n-slate-3 text-xxs text-n-slate-12 shrink-0"
+        :title="allCount"
+      >
+        {{ formattedAllCount }}
+      </span>
       <span
         v-if="!hasAppliedFiltersOrActiveFolders"
         class="px-2 py-1 my-0.5 mx-1 rounded-md capitalize bg-n-slate-3 text-xxs text-n-slate-12 shrink-0"