revert: restore conversation unread count feature flag (#14623)

This reverts #14610 so conversation unread counts are again controlled
by the `conversation_unread_counts` feature flag across the API,
ActionCable broadcasts, notifier/listener paths, and dashboard sidebar
fetching.

## Closes
- None

## What changed
- Restores feature-flag checks for conversation unread count reads and
broadcasts.
- Restores the dashboard feature flag constant and sidebar/store
behavior for disabled unread counts.
- Restores the specs that cover disabled-feature behavior.

## How to test
- In an account with `conversation_unread_counts` enabled, verify
sidebar unread counts are fetched and updated in real time.
- Disable `conversation_unread_counts` for the account and verify unread
count requests/broadcasts are skipped.

app/javascript/dashboard/components-next/sidebar/Sidebar.vue

@@ -61,9 +61,21 @@ const hasAdvancedAssignment = computed(() => {
   );
 });
 
-const fetchConversationUnreadCounts = currentAccountId => {
+const hasConversationUnreadCounts = computed(() => {
+  return isFeatureEnabledonAccount.value(
+    accountId.value,
+    FEATURE_FLAGS.CONVERSATION_UNREAD_COUNTS
+  );
+});
+
+const fetchConversationUnreadCounts = ([currentAccountId, isEnabled]) => {
   if (!currentAccountId) return;
 
+  if (!isEnabled) {
+    store.dispatch('conversationUnreadCounts/clear');
+    return;
+  }
+
   store.dispatch('conversationUnreadCounts/get');
 };
 
@@ -188,7 +200,7 @@ onMounted(() => {
   store.dispatch('customViews/get', 'contact');
 });
 
-watch(accountId, fetchConversationUnreadCounts, {
+watch([accountId, hasConversationUnreadCounts], fetchConversationUnreadCounts, {
   immediate: true,
 });
 

app/javascript/dashboard/featureFlags.js

@@ -46,6 +46,7 @@ export const FEATURE_FLAGS = {
   COMPANIES: 'companies',
   ADVANCED_SEARCH: 'advanced_search',
   CONVERSATION_REQUIRED_ATTRIBUTES: 'conversation_required_attributes',
+  CONVERSATION_UNREAD_COUNTS: 'conversation_unread_counts',
 };
 
 export const PREMIUM_FEATURES = [

app/javascript/dashboard/helper/actionCable.js

@@ -13,6 +13,7 @@ import {
 } from 'dashboard/composables/useWhatsappCallSession';
 import { VOICE_CALL_PROVIDERS } from 'dashboard/helper/inbox';
 import { VOICE_CALL_DIRECTION } from 'dashboard/components-next/message/constants';
+import { FEATURE_FLAGS } from 'dashboard/featureFlags';
 
 const { isImpersonating } = useImpersonation();
 const UNREAD_COUNTS_REFETCH_THROTTLE_MS = 5000;
@@ -171,10 +172,23 @@ class ActionCableConnector extends BaseActionCableConnector {
   };
 
   fetchConversationUnreadCounts = () => {
+    if (!this.isConversationUnreadCountsEnabled()) return;
+
     this.lastUnreadCountsFetchAt = Date.now();
     this.app.$store.dispatch('conversationUnreadCounts/get');
   };
 
+  isConversationUnreadCountsEnabled = () => {
+    const accountId = this.app.$store.getters.getCurrentAccountId;
+    const isFeatureEnabled =
+      this.app.$store.getters['accounts/isFeatureEnabledonAccount'];
+
+    return isFeatureEnabled?.(
+      accountId,
+      FEATURE_FLAGS.CONVERSATION_UNREAD_COUNTS
+    );
+  };
+
   onTypingOn = ({ conversation, user }) => {
     const conversationId = conversation.id;
 

app/javascript/dashboard/helper/specs/actionCable.spec.js

@@ -30,6 +30,7 @@ describe('ActionCableConnector - Copilot Tests', () => {
         dispatch: mockDispatch,
         getters: {
           getCurrentAccountId: 1,
+          'accounts/isFeatureEnabledonAccount': vi.fn(() => true),
         },
       },
     };
@@ -88,6 +89,21 @@ describe('ActionCableConnector - Copilot Tests', () => {
       expect(mockDispatch).toHaveBeenCalledWith('conversationUnreadCounts/get');
     });
 
+    it('does not refetch unread counts when unread count feature is disabled', () => {
+      store.$store.getters[
+        'accounts/isFeatureEnabledonAccount'
+      ].mockReturnValue(false);
+
+      actionCable.onReceived({
+        event: 'conversation.unread_count_changed',
+        data: { account_id: 1 },
+      });
+
+      expect(mockDispatch).not.toHaveBeenCalledWith(
+        'conversationUnreadCounts/get'
+      );
+    });
+
     it('should throttle unread count refetches for repeated events', () => {
       vi.useFakeTimers();
       vi.setSystemTime(new Date('2026-01-01T00:00:00Z'));

app/javascript/dashboard/store/modules/conversationUnreadCounts.js

@@ -48,6 +48,9 @@ export const actions = {
       // Ignore errors so the sidebar can continue rendering without badges.
     }
   },
+  clear({ commit }) {
+    commit(types.SET_CONVERSATION_UNREAD_COUNTS, {});
+  },
 };
 
 export const mutations = {

app/javascript/dashboard/store/modules/specs/conversationUnreadCounts/actions.spec.js

@@ -39,4 +39,15 @@ describe('#actions', () => {
       expect(commit).not.toHaveBeenCalled();
     });
   });
+
+  describe('#clear', () => {
+    it('clears unread counts', () => {
+      actions.clear({ commit });
+
+      expect(commit).toHaveBeenCalledWith(
+        types.SET_CONVERSATION_UNREAD_COUNTS,
+        {}
+      );
+    });
+  });
 });