fix: null error in plugin app scope check, close #1734

Author: Akryum

packages/app-backend-api/src/hooks.ts

@@ -33,7 +33,7 @@ export class DevtoolsHookable implements Hookable<BackendContext> {
 
         // App scope
         if (!this.plugin.descriptor.disableAppScope &&
-          this.ctx.currentAppRecord.options.app !== this.plugin.descriptor.app) return
+          this.ctx.currentAppRecord?.options.app !== this.plugin.descriptor.app) return
 
         // Plugin scope
         if (!this.plugin.descriptor.disablePluginScope &&