add env to turn on and off extension mocking

src/Umbraco.Web.UI.Client/.env

@@ -3,3 +3,4 @@ VITE_UMBRACO_USE_MSW=on # on = turns on MSW, off = disables all mock handlers
 VITE_UMBRACO_API_URL=http://localhost:11000
 VITE_UMBRACO_INSTALL_STATUS=running # running or must-install or must-upgrade
 VITE_MSW_QUIET=off # on = turns off MSW console logs, off = turns on MSW console logs
+VITE_UMBRACO_EXTENSION_MOCKS=off # on = turns on extension mocks, off = turns off extension mocks

src/Umbraco.Web.UI.Client/src/core/mocks/browser-handlers.ts

@@ -64,8 +64,8 @@ switch (import.meta.env.VITE_UMBRACO_INSTALL_STATUS) {
 		handlers.push(serverHandlers.serverRunningHandler);
 }
 
-switch (import.meta.env.MODE) {
-	case 'development':
+switch (import.meta.env.VITE_UMBRACO_EXTENSION_MOCKS) {
+	case 'on':
 		handlers.push(manifestsHandlers.manifestDevelopmentHandler);
 		break;
 

src/Umbraco.Web.UI.Client/src/core/mocks/e2e-handlers.ts

@@ -17,7 +17,7 @@ import { handlers as redirectManagementHandlers } from './domains/redirect-manag
 export const handlers = [
 	serverHandlers.serverRunningHandler,
 	serverHandlers.serverVersionHandler,
-	manifestsHandlers.manifestDevelopmentHandler,
+	manifestsHandlers.manifestEmptyHandler,
 	...installHandlers,
 	...upgradeHandlers,
 	...userHandlers,

src/Umbraco.Web.UI.Client/src/vite-env.d.ts

@@ -5,4 +5,5 @@ interface ImportMetaEnv {
 	VITE_UMBRACO_API_URL: string;
 	VITE_UMBRACO_USE_MSW: 'on' | 'off';
 	VITE_MSW_QUIET: 'on' | 'off';
+	VITE_UMBRACO_EXTENSION_MOCKS: 'on' | 'off';
 }