test(project-events): add tests for demo configuration defaults

Added unit test cases to verify that the `demo.enabled` field is properly initialized to `false` in configurations and mock overrides.

frontend/tests/lib/hooks/useProjectEvents.test.ts

@@ -27,6 +27,9 @@ jest.mock('@/config/app.config', () => ({
     debug: {
       api: false,
     },
+    demo: {
+      enabled: false,
+    },
   },
 }));
 
@@ -649,6 +652,9 @@ describe('useProjectEvents', () => {
           debug: {
             api: true,
           },
+          demo: {
+            enabled: false,
+          },
         },
       }));