fix: order labels, teams, channels in sidebar by unread count (CW-7151) (#14510)

# Pull Request Template

## Description

Ordered the conversation sidebar labels, teams and channels by the
unread count.

Fixes # CW-7151

## Type of change

Please delete options that are not relevant.

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

Verified manually. Adding the screenshot below.
<img width="625" height="833" alt="Screenshot 2026-05-20 at 10 24 30 PM"
src="https://github.com/user-attachments/assets/ad04464d-0fc3-4ac7-b8cc-786e9647a299"
/>



## 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
- [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/sidebar/Sidebar.vue

@@ -204,8 +204,44 @@ watch([accountId, hasConversationUnreadCounts], fetchConversationUnreadCounts, {
   immediate: true,
 });
 
+const normalizeUnreadCount = count => {
+  const unreadCount = Number(count);
+  return Number.isFinite(unreadCount) && unreadCount > 0 ? unreadCount : 0;
+};
+
+const sortByUnreadCount = (items, labelKey, unreadCountKey) =>
+  items.slice().sort((a, b) => {
+    const unreadCountDiff =
+      normalizeUnreadCount(unreadCountKey(b)) -
+      normalizeUnreadCount(unreadCountKey(a));
+
+    if (unreadCountDiff !== 0) return unreadCountDiff;
+
+    return labelKey(a).localeCompare(labelKey(b));
+  });
+
+const sortedTeams = computed(() =>
+  sortByUnreadCount(
+    teams.value,
+    team => team.name,
+    team => getTeamUnreadCount.value(team.id)
+  )
+);
+
 const sortedInboxes = computed(() =>
-  inboxes.value.slice().sort((a, b) => a.name.localeCompare(b.name))
+  sortByUnreadCount(
+    inboxes.value,
+    inbox => inbox.name,
+    inbox => getInboxUnreadCount.value(inbox.id)
+  )
+);
+
+const sortedLabels = computed(() =>
+  sortByUnreadCount(
+    labels.value,
+    label => label.title,
+    label => getLabelUnreadCount.value(label.id)
+  )
 );
 
 const closeMobileSidebar = () => {
@@ -298,7 +334,7 @@ const menuItems = computed(() => {
           label: t('SIDEBAR.TEAMS'),
           icon: 'i-lucide-users',
           activeOn: ['conversations_through_team'],
-          children: teams.value.map(team => ({
+          children: sortedTeams.value.map(team => ({
             name: `${team.name}-${team.id}`,
             label: team.name,
             badgeCount: getTeamUnreadCount.value(team.id),
@@ -330,7 +366,7 @@ const menuItems = computed(() => {
           label: t('SIDEBAR.LABELS'),
           icon: 'i-lucide-tag',
           activeOn: ['conversations_through_label'],
-          children: labels.value.map(label => ({
+          children: sortedLabels.value.map(label => ({
             name: `${label.title}-${label.id}`,
             label: label.title,
             badgeCount: getLabelUnreadCount.value(label.id),