feat: Add inbox view under feature flag on the sidebar (#9049)

Co-authored-by: Pranav <pranav@chatwoot.com>

app/javascript/dashboard/store/modules/notifications/getters.js

@@ -11,6 +11,9 @@ export const getters = {
     );
     return sortedNotifications;
   },
+  getNotificationById: $state => id => {
+    return $state.records[id] || {};
+  },
   getUIFlags($state) {
     return $state.uiFlags;
   },

app/javascript/dashboard/store/modules/specs/notifications/getters.spec.js

@@ -44,6 +44,16 @@ describe('#getters', () => {
     ]);
   });
 
+  it('getNotificationById', () => {
+    const state = {
+      records: {
+        1: { id: 1 },
+      },
+    };
+    expect(getters.getNotificationById(state)(1)).toEqual({ id: 1 });
+    expect(getters.getNotificationById(state)(2)).toEqual({});
+  });
+
   it('getUIFlags', () => {
     const state = {
       uiFlags: {