feat: release 2.2.0 with PC-only tests and execution reliability fixes

Unify task scheduling and queue state, fix Android input and observation recovery, preserve screenshot paths, and match final review criteria accurately. Add collapsible copyable results and publish the complete 2.1.0 upgrade notes. Validation: 3189 backend tests, 326 frontend tests, 24 client tests, production build and quality gates.

apps/showcase_ui/src/app/components/task-plugins/task-plugins.component.spec.ts

@@ -75,4 +75,23 @@ describe('TaskPluginsComponent', () => {
     expect(fixture.nativeElement.textContent).toContain('重试');
     expect(fixture.componentInstance.automatic).toBeTrue();
   });
+
+  it('filters PC-compatible plugins and removes incompatible manual choices on target change', () => {
+    const fixture = TestBed.createComponent(TaskPluginsComponent), component=fixture.componentInstance;
+    component.toggle();
+    const profile={name:'default',label:'默认',authorized:true,is_default:true};
+    const plugin=(id:string,targets:string[])=>({enabled:true,manifest:{id,name:id,targets},profiles:[profile]});
+    http.expectOne('/api/plugins').flush({plugins:[plugin('android-only',['android']),plugin('mixed-only',['mixed']),plugin('desktop',['computer'])]});
+    component.automatic=false;component.selected={'android-only':'default'};
+    const emitted=jasmine.createSpy('changed');component.changed.subscribe(emitted);
+    fixture.componentRef.setInput('target','computer');fixture.detectChanges();
+    expect(component.available().map(p=>p.manifest.id)).toEqual(['desktop']);
+    expect(emitted).toHaveBeenCalledWith({plugins:[]});
+    expect(fixture.nativeElement.textContent).toContain('画面观察');
+    const choice:HTMLInputElement=fixture.nativeElement.querySelector('.choice input');choice.click();fixture.detectChanges();
+    expect(emitted).toHaveBeenCalledWith({plugins:[{id:'desktop',profile:'default'}]});
+    fixture.componentRef.setInput('target','android');fixture.detectChanges();
+    expect(component.available().map(p=>p.manifest.id)).toEqual(['android-only','mixed-only']);
+    expect(component.selected).toEqual({});
+  });
 });