Decouple dialog refocus from PanelsService via FocusService

Dialogs only needed refocus(); injecting PanelsService boots a whole
workspace, which secondary windows must not do.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ui/src/app/dialogs/confirm-dialog.ts

@@ -1,6 +1,6 @@
 import { Component, ElementRef, afterNextRender, inject, input, viewChild } from '@angular/core';
 import { DialogsService, type ConfirmRequest } from '../dialogs.service';
-import { PanelsService } from '../panels.service';
+import { FocusService } from '../focus.service';
 
 @Component({
   selector: 'app-confirm-dialog',
@@ -41,7 +41,7 @@ export class ConfirmDialog {
 
   private readonly confirmBtn = viewChild.required<ElementRef<HTMLButtonElement>>('confirmBtn');
   private readonly dialogs = inject(DialogsService);
-  private readonly panels = inject(PanelsService);
+  private readonly focus = inject(FocusService);
 
   constructor() {
     afterNextRender(() => this.confirmBtn().nativeElement.focus());
@@ -59,6 +59,6 @@ export class ConfirmDialog {
 
   private close(): void {
     this.dialogs.confirm.set(null);
-    this.panels.refocus();
+    this.focus.bump();
   }
 }