create license management

src/app/layout/service/layout.service.ts

@@ -1,6 +1,6 @@
-import { computed, effect, Injectable, signal } from '@angular/core';
+import { computed, effect, Injectable, signal, TemplateRef } from '@angular/core';
 import { MenuItem } from 'primeng/api';
-import { Subject } from 'rxjs';
+import { BehaviorSubject, Subject } from 'rxjs';
 
 export interface layoutConfig {
   preset?: string;
@@ -218,4 +218,11 @@ export class LayoutService {
   setPanelInfo(info: IPanelInfo) {
     this.panelInfo.set(info);
   }
+
+  private headerSlot = new BehaviorSubject<TemplateRef<any> | null>(null);
+  headerSlot$ = this.headerSlot.asObservable();
+
+  setHeaderSlot(tpl: TemplateRef<any> | null) {
+    this.headerSlot.next(tpl);
+  }
 }