diff --git a/packages/core/src/animation/queue.ts b/packages/core/src/animation/queue.ts
index 86e4942ebe66..86b27ec6db9a 100644
--- a/packages/core/src/animation/queue.ts
+++ b/packages/core/src/animation/queue.ts
@@ -24,14 +24,11 @@ export const ANIMATION_QUEUE = new InjectionToken<AnimationQueue>(
   typeof ngDevMode !== 'undefined' && ngDevMode ? 'AnimationQueue' : '',
   {
     factory: () => {
-      const injector = inject(EnvironmentInjector);
-      const queue = new Set<VoidFunction>();
-      injector.onDestroy(() => queue.clear());
       return {
-        queue,
+        queue: new Set(),
         isScheduled: false,
         scheduler: null,
-        injector,
+        injector: inject(EnvironmentInjector), // should be the root injector
       };
     },
   },
diff --git a/packages/core/src/render3/node_animations.ts b/packages/core/src/render3/node_animations.ts
deleted file mode 100644
index 98015d490d5e..000000000000
--- a/packages/core/src/render3/node_animations.ts
+++ /dev/null
@@ -1,254 +0,0 @@
-/**
- * @license
- * Copyright Google LLC All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.dev/license
- */
-
-import {
-  RunLeaveAnimationFn,
-  LeaveNodeAnimations,
-  AnimationLViewData,
-} from '../animation/interfaces';
-import {allLeavingAnimations} from '../animation/longest_animation';
-import {queueEnterAnimations, addToAnimationQueue} from '../animation/queue';
-import {Injector, INJECTOR} from '../di';
-import {CONTAINER_HEADER_OFFSET} from './interfaces/container';
-import {TNode, TNodeType} from './interfaces/node';
-import {RElement} from './interfaces/renderer_dom';
-import {isComponentHost, isLContainer} from './interfaces/type_checks';
-import {ANIMATIONS, ID, LView, TVIEW} from './interfaces/view';
-import {getComponentLViewByIndex} from './util/view_utils';
-
-export function maybeQueueEnterAnimation(
-  parentLView: LView | undefined,
-  parent: RElement | null,
-  tNode: TNode,
-  injector: Injector,
-): void {
-  const enterAnimations = parentLView?.[ANIMATIONS]?.enter;
-  if (parent !== null && enterAnimations && enterAnimations.has(tNode.index)) {
-    queueEnterAnimations(injector, enterAnimations);
-  }
-}
-
-export function runLeaveAnimationsWithCallback(
-  lView: LView | undefined,
-  tNode: TNode,
-  injector: Injector,
-  callback: Function,
-) {
-  // It's possible that the AppRef has been destroyed, which would also destroy
-  // the injector tree. If this happens, we will get an error when we try to
-  // get the injector, so we catch it here and avoid the error and return
-  // safely.
-  try {
-    injector.get(INJECTOR);
-  } catch {
-    return callback(false);
-  }
-
-  const animations = lView?.[ANIMATIONS];
-
-  // get all nodes in the current view that are descendants of tNode and have leave animations
-  const nodesWithExitAnimations = aggregateDescendantAnimations(lView, tNode, animations);
-
-  if (nodesWithExitAnimations.size === 0) {
-    let hasNestedAnimations = false;
-    if (lView) {
-      const nestedPromises: Promise<unknown>[] = [];
-      collectNestedViewAnimations(lView, tNode, nestedPromises);
-      hasNestedAnimations = nestedPromises.length > 0;
-    }
-
-    if (!hasNestedAnimations) {
-      return callback(false);
-    }
-  }
-
-  if (lView) allLeavingAnimations.add(lView[ID]);
-
-  addToAnimationQueue(
-    injector,
-    () =>
-      executeLeaveAnimations(
-        lView,
-        tNode,
-        animations || undefined,
-        nodesWithExitAnimations,
-        callback,
-      ),
-    animations || undefined,
-  );
-}
-
-// Identifies all elements that are descendants of `tNode` *within the same component view*
-// (LView) and have active leave animations. Since `tNode` is being removed, its descendants
-// will also be removed. We must execute their leave animations and wait for them to finish
-// before physically removing `tNode` from the DOM.
-//
-// Instead of performing a potentially expensive downward traversal of the
-// entire `tNode` subtree to find animated descendants, we iterate over the `leaveAnimations`
-// map. This map contains all pending leave animations in the current LView and is typically
-// very small.
-//
-// Note: Animations across LView boundaries (e.g., in child components or embedded views)
-// are collected separately via `collectNestedViewAnimations`.
-function aggregateDescendantAnimations(
-  lView: LView | undefined,
-  tNode: TNode,
-  animations: AnimationLViewData | null | undefined,
-): Map<number, LeaveNodeAnimations> {
-  const nodesWithExitAnimations = new Map<number, LeaveNodeAnimations>();
-  const leaveAnimations = animations?.leave;
-
-  if (leaveAnimations && leaveAnimations.has(tNode.index)) {
-    nodesWithExitAnimations.set(tNode.index, leaveAnimations.get(tNode.index)!);
-  }
-
-  if (lView && leaveAnimations) {
-    for (const [index, animationData] of leaveAnimations) {
-      if (nodesWithExitAnimations.has(index)) continue;
-
-      // Get the tNode for the animation. This node might be a descendant of the tNode we are removing.
-      // If so, we need to run its leave animation as well.
-      const nestedTNode = lView[TVIEW].data[index] as TNode;
-      let parent = nestedTNode.parent;
-
-      // Traverse upward to check if `tNode` is an ancestor of `nestedTNode`
-      // For each animation in the map, we retrieve its corresponding TNode (`nestedTNode`) and
-      // traverse UP the tree using parent pointers. If we encounter `tNode` during this upward
-      // traversal, we know the animated element is a descendant, and we add its animation data
-      // to `nodesWithExitAnimations`.
-      while (parent) {
-        if (parent === tNode) {
-          nodesWithExitAnimations.set(index, animationData);
-          break;
-        }
-        parent = parent.parent;
-      }
-    }
-  }
-  return nodesWithExitAnimations;
-}
-
-function executeLeaveAnimations(
-  lView: LView | undefined,
-  tNode: TNode,
-  animations: AnimationLViewData | undefined,
-  nodesWithExitAnimations: Map<number, LeaveNodeAnimations>,
-  callback: Function,
-) {
-  // it's possible that in the time between when the leave animation was
-  // and the time it was executed, the data structure changed. So we need
-  // to be safe here.
-  const runningAnimations: Promise<unknown>[] = [];
-
-  if (animations && animations.leave) {
-    for (const [index] of nodesWithExitAnimations) {
-      if (!animations.leave.has(index)) continue;
-
-      const currentAnimationData = animations.leave.get(index)!;
-      for (const animationFn of currentAnimationData.animateFns) {
-        const {promise} = animationFn() as ReturnType<RunLeaveAnimationFn>;
-        runningAnimations.push(promise);
-      }
-      animations.detachedLeaveAnimationFns = undefined;
-    }
-  }
-
-  // Also add nested view animations
-  if (lView) {
-    collectNestedViewAnimations(lView, tNode, runningAnimations);
-  }
-
-  if (runningAnimations.length > 0) {
-    const currentAnimations = animations || lView?.[ANIMATIONS];
-    if (currentAnimations) {
-      const prevRunning = currentAnimations.running;
-      if (prevRunning) {
-        runningAnimations.push(prevRunning);
-      }
-      currentAnimations.running = Promise.allSettled(runningAnimations);
-      runAfterLeaveAnimations(lView!, currentAnimations.running, callback);
-    } else {
-      Promise.allSettled(runningAnimations).then(() => {
-        if (lView) allLeavingAnimations.delete(lView[ID]);
-        callback(true);
-      });
-    }
-  } else {
-    if (lView) allLeavingAnimations.delete(lView[ID]);
-    callback(false);
-  }
-}
-
-/**
- * Collects leave animations from nested views (components and containers)
- * starting from the given TNode's children.
- */
-function collectNestedViewAnimations(
-  lView: LView,
-  tNode: TNode,
-  collectedPromises: Promise<unknown>[],
-) {
-  if (isComponentHost(tNode)) {
-    const componentView = getComponentLViewByIndex(tNode.index, lView);
-    collectAllViewLeaveAnimations(componentView, collectedPromises);
-  } else if (tNode.type & TNodeType.AnyContainer) {
-    const lContainer = lView[tNode.index];
-    if (isLContainer(lContainer)) {
-      for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {
-        const subView = lContainer[i] as LView;
-        collectAllViewLeaveAnimations(subView, collectedPromises);
-      }
-    }
-  }
-
-  let child = tNode.child;
-  while (child) {
-    collectNestedViewAnimations(lView, child, collectedPromises);
-    child = child.next;
-  }
-}
-
-/**
- * Recursively collects all leave animations from a view and its children.
- */
-function collectAllViewLeaveAnimations(view: LView, collectedPromises: Promise<unknown>[]) {
-  const animations = view[ANIMATIONS];
-  if (animations && animations.leave) {
-    for (const animationData of animations.leave.values()) {
-      for (const animationFn of animationData.animateFns) {
-        // We interpret the animation function to get the promise
-        const {promise} = animationFn() as ReturnType<RunLeaveAnimationFn>;
-        collectedPromises.push(promise);
-      }
-    }
-  }
-
-  let child = view[TVIEW].firstChild;
-  while (child) {
-    collectNestedViewAnimations(view, child, collectedPromises);
-    child = child.next;
-  }
-}
-
-function runAfterLeaveAnimations(
-  lView: LView,
-  runningAnimations: Promise<unknown>,
-  callback: Function,
-) {
-  runningAnimations.then(() => {
-    // We only want to clear the running flag and the allLeavingAnimations set if
-    // the current running animation is the same as the one we just waited for.
-    // If it's different, it means another animation started while we were waiting,
-    // and that other animation is now responsible for clearing the flag.
-    if (lView[ANIMATIONS]?.running === runningAnimations) {
-      lView[ANIMATIONS]!.running = undefined;
-      allLeavingAnimations.delete(lView[ID]);
-    }
-    callback(true);
-  });
-}
diff --git a/packages/core/src/render3/node_manipulation.ts b/packages/core/src/render3/node_manipulation.ts
index a6f16aeebfea..005213342ec8 100644
--- a/packages/core/src/render3/node_manipulation.ts
+++ b/packages/core/src/render3/node_manipulation.ts
@@ -83,8 +83,10 @@ import {profiler} from './profiler';
 import {ProfilerEvent} from '../../primitives/devtools';
 import {getLViewParent, getNativeByTNode, unwrapRNode} from './util/view_utils';
 import {cancelLeavingNodes, reusedNodes, trackLeavingNodes} from '../animation/utils';
+import {allLeavingAnimations} from '../animation/longest_animation';
 import {Injector} from '../di';
-import {maybeQueueEnterAnimation, runLeaveAnimationsWithCallback} from './node_animations';
+import {addToAnimationQueue, queueEnterAnimations} from '../animation/queue';
+import {RunLeaveAnimationFn} from '../animation/interfaces';
 
 const enum WalkTNodeTreeAction {
   /** node create in the native environment. Run on initial creation. */
@@ -103,6 +105,18 @@ const enum WalkTNodeTreeAction {
   Destroy = 3,
 }
 
+function maybeQueueEnterAnimation(
+  parentLView: LView | undefined,
+  parent: RElement | null,
+  tNode: TNode,
+  injector: Injector,
+): void {
+  const enterAnimations = parentLView?.[ANIMATIONS]?.enter;
+  if (parent !== null && enterAnimations && enterAnimations.has(tNode.index)) {
+    queueEnterAnimations(injector, enterAnimations);
+  }
+}
+
 /**
  * NOTE: for performance reasons, the possible actions are inlined within the function instead of
  * being passed as an argument.
@@ -373,6 +387,61 @@ function cleanUpView(tView: TView, lView: LView): void {
   }
 }
 
+function runLeaveAnimationsWithCallback(
+  lView: LView | undefined,
+  tNode: TNode,
+  injector: Injector,
+  callback: Function,
+) {
+  const animations = lView?.[ANIMATIONS];
+
+  if (animations == null || animations.leave == undefined || !animations.leave.has(tNode.index))
+    return callback(false);
+
+  if (lView) allLeavingAnimations.add(lView[ID]);
+
+  addToAnimationQueue(
+    injector,
+    () => {
+      // it's possible that in the time between when the leave animation was
+      // and the time it was executed, the data structure changed. So we need
+      // to be safe here.
+      if (animations.leave && animations.leave.has(tNode.index)) {
+        const leaveAnimationMap = animations.leave;
+        const leaveAnimations = leaveAnimationMap.get(tNode.index);
+        const runningAnimations = [];
+        if (leaveAnimations) {
+          for (let index = 0; index < leaveAnimations.animateFns.length; index++) {
+            const animationFn = leaveAnimations.animateFns[index];
+            const {promise} = animationFn() as ReturnType<RunLeaveAnimationFn>;
+            runningAnimations.push(promise);
+          }
+          animations.detachedLeaveAnimationFns = undefined;
+        }
+        animations.running = Promise.allSettled(runningAnimations);
+        runAfterLeaveAnimations(lView!, callback);
+      } else {
+        if (lView) allLeavingAnimations.delete(lView[ID]);
+        callback(false);
+      }
+    },
+    animations,
+  );
+}
+
+function runAfterLeaveAnimations(lView: LView, callback: Function) {
+  const runningAnimations = lView[ANIMATIONS]?.running;
+  if (runningAnimations) {
+    runningAnimations.then(() => {
+      lView[ANIMATIONS]!.running = undefined;
+      allLeavingAnimations.delete(lView[ID]);
+      callback(true);
+    });
+    return;
+  }
+  callback(false);
+}
+
 /** Removes listeners and unsubscribes from output subscriptions */
 function processCleanups(tView: TView, lView: LView): void {
   ngDevMode && assertNotReactive(processCleanups.name);
diff --git a/packages/core/test/acceptance/authoring/signal_inputs_spec.ts b/packages/core/test/acceptance/authoring/signal_inputs_spec.ts
index 3dfd33f82dbb..bfac1c27fbff 100644
--- a/packages/core/test/acceptance/authoring/signal_inputs_spec.ts
+++ b/packages/core/test/acceptance/authoring/signal_inputs_spec.ts
@@ -652,71 +652,5 @@ describe('signal inputs', () => {
       fixture.detectChanges(); // Detect changes after animation completes and element is removed
       expect(fixture.nativeElement.querySelector('notification')).toBeNull(); // Verify element is removed
     }));
-
-    it('should support nested animate.leave with signal inputs via host binding', fakeAsync(() => {
-      const styles = `
-        .fade-out {
-          animation: fade-out 500ms;
-        }
-        @keyframes fade-out {
-          from { opacity: 1; }
-          to { opacity: 0; }
-        }
-      `;
-
-      @Component({
-        selector: 'child-cmp',
-        template: '<div class="target">Content</div>',
-        host: {
-          '[animate.leave]': 'animClass()',
-        },
-      })
-      class ChildCmp {
-        animClass = input.required<string>();
-      }
-
-      @Component({
-        selector: 'test-cmp',
-        styles: [styles],
-        imports: [ChildCmp],
-        template: `
-          @if (show()) {
-            <div class="parent">
-              <child-cmp [animClass]="'fade-out'" class="child-comp" />
-            </div>
-          }
-        `,
-        encapsulation: ViewEncapsulation.None,
-      })
-      class TestCmp {
-        show = signal(true);
-      }
-
-      TestBed.configureTestingModule({animationsEnabled: true});
-      const fixture = TestBed.createComponent(TestCmp);
-      const cmp = fixture.componentInstance;
-      fixture.detectChanges();
-
-      const target = fixture.nativeElement.querySelector('.child-comp');
-      expect(target).toBeTruthy();
-
-      cmp.show.set(false);
-      fixture.detectChanges();
-      tickAnimationFrames(1);
-
-      const targetAfter = fixture.nativeElement.querySelector('.child-comp');
-      expect(targetAfter).withContext('Nested component should persist').not.toBeNull();
-
-      if (targetAfter) {
-        expect(targetAfter.classList.contains('fade-out'))
-          .withContext('Should have animation class from signal input host binding')
-          .toBeTruthy();
-
-        targetAfter.dispatchEvent(new AnimationEvent('animationend', {animationName: 'fade-out'}));
-        tick();
-
-        expect(fixture.nativeElement.querySelector('.child-comp')).toBeNull();
-      }
-    }));
   });
 });
diff --git a/packages/core/test/acceptance/nested_animation_spec.ts b/packages/core/test/acceptance/nested_animation_spec.ts
deleted file mode 100644
index 8ae3e9064dfd..000000000000
--- a/packages/core/test/acceptance/nested_animation_spec.ts
+++ /dev/null
@@ -1,366 +0,0 @@
-/**
- * @license
- * Copyright Google LLC All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.dev/license
- */
-
-import {Component, signal, ViewEncapsulation, OnDestroy, destroyPlatform} from '@angular/core';
-import {TestBed, fakeAsync, tick} from '@angular/core/testing';
-import {BrowserTestingModule, platformBrowserTesting} from '@angular/platform-browser/testing';
-import {NoopAnimationsModule} from '@angular/platform-browser/animations';
-import {tickAnimationFrames} from '../animation_utils/tick_animation_frames';
-
-describe('Nested animate.leave', () => {
-  beforeEach(() => {
-    destroyPlatform();
-    TestBed.resetTestEnvironment();
-    TestBed.initTestEnvironment(
-      [BrowserTestingModule, NoopAnimationsModule],
-      platformBrowserTesting(),
-    );
-  });
-
-  it('should wait for nested animations inside @if', fakeAsync(() => {
-    const styles = `
-      .fade {
-        animation: fade-out 500ms;
-      }
-      @keyframes fade-out {
-        from { opacity: 1; }
-        to { opacity: 0; }
-      }
-    `;
-
-    @Component({
-      selector: 'test-cmp',
-      template: `
-        <div>
-          @if (show()) {
-            <div class="parent">
-              <div animate.leave="fade" class="child">Child</div>
-            </div>
-          }
-        </div>
-      `,
-      styles: [styles],
-      encapsulation: ViewEncapsulation.None,
-    })
-    class TestCmp {
-      show = signal(true);
-    }
-
-    TestBed.configureTestingModule({animationsEnabled: true});
-    const fixture = TestBed.createComponent(TestCmp);
-    const cmp = fixture.componentInstance;
-    fixture.detectChanges();
-
-    const child = fixture.nativeElement.querySelector('.child');
-    expect(child).toBeTruthy();
-
-    cmp.show.set(false);
-    fixture.detectChanges();
-    tickAnimationFrames(1);
-
-    // In current Angular, this likely fails immediately because parent is removed, taking child with it.
-    // We expect child to remain if we support nested animations.
-    const childAfter = fixture.nativeElement.querySelector('.child');
-
-    // This expectation confirms if it works or fails.
-    // If it works, childAfter is NOT null.
-    // If it fails (current behavior), childAfter IS null.
-
-    // We want to prove it fails currently, so we expect rejection or we just assert strict truth.
-    // I will use strict truth to demonstrate failure.
-    expect(childAfter).withContext('Child element should persist during animation').not.toBeNull();
-    if (childAfter) {
-      expect(childAfter.classList.contains('fade'))
-        .withContext('Child should get animation class')
-        .toBeTruthy();
-
-      // Simulate end
-      childAfter.dispatchEvent(new AnimationEvent('animationend', {animationName: 'fade-out'}));
-      tick();
-    }
-  }));
-
-  it('should support nested host bindings', fakeAsync(() => {
-    const styles = `
-      .fade {
-        animation: fade-out 500ms;
-      }
-      @keyframes fade-out {
-        from { opacity: 1; }
-        to { opacity: 0; }
-      }
-    `;
-
-    @Component({
-      selector: 'fade-cmp',
-      host: {'animate.leave': 'fade'},
-      template: '<p>I should fade</p>',
-      encapsulation: ViewEncapsulation.None,
-    })
-    class FadeComponent {}
-
-    @Component({
-      selector: 'test-cmp',
-      styles: [styles],
-      imports: [FadeComponent],
-      template: `
-        <div>
-          @if (show()) {
-            <div class="parent">
-              <fade-cmp class="child" />
-            </div>
-          }
-        </div>
-      `,
-      encapsulation: ViewEncapsulation.None,
-    })
-    class TestCmp {
-      show = signal(true);
-    }
-
-    TestBed.configureTestingModule({animationsEnabled: true});
-    const fixture = TestBed.createComponent(TestCmp);
-    const cmp = fixture.componentInstance;
-    fixture.detectChanges();
-
-    const child = fixture.nativeElement.querySelector('.child');
-    expect(child).toBeTruthy();
-
-    cmp.show.set(false);
-    fixture.detectChanges();
-    tickAnimationFrames(1);
-
-    const childAfter = fixture.nativeElement.querySelector('.child');
-    expect(childAfter).withContext('Child element should persist during animation').not.toBeNull();
-
-    if (childAfter) {
-      expect(childAfter.classList.contains('fade'))
-        .withContext('Child should get animation class from host binding')
-        .toBeTruthy();
-
-      childAfter.dispatchEvent(new AnimationEvent('animationend', {animationName: 'fade-out'}));
-      tick();
-
-      const childFinal = fixture.nativeElement.querySelector('.child');
-      expect(childFinal).toBeNull();
-    }
-  }));
-
-  it('should support nested function syntax', fakeAsync(() => {
-    let completeFn: Function | undefined;
-    @Component({
-      selector: 'test-cmp',
-      template: `
-        <div>
-          @if (show()) {
-            <div class="parent">
-              <div (animate.leave)="animateFn($event)" class="child">Child</div>
-            </div>
-          }
-        </div>
-      `,
-      encapsulation: ViewEncapsulation.None,
-    })
-    class TestCmp {
-      show = signal(true);
-      animateFn = (event: any) => {
-        event.target.classList.add('custom-anim');
-        completeFn = event.animationComplete;
-      };
-    }
-
-    TestBed.configureTestingModule({animationsEnabled: true});
-    const fixture = TestBed.createComponent(TestCmp);
-    const cmp = fixture.componentInstance;
-    fixture.detectChanges();
-
-    cmp.show.set(false);
-    fixture.detectChanges();
-    tickAnimationFrames(1);
-
-    const childAfter = fixture.nativeElement.querySelector('.child');
-    expect(childAfter).withContext('Child element should persist during animation').not.toBeNull();
-
-    if (childAfter) {
-      expect(childAfter.classList.contains('custom-anim'))
-        .withContext('Child should get class from animation function')
-        .toBeTruthy();
-
-      expect(completeFn).withContext('animationComplete should be captured').toBeDefined();
-      completeFn!();
-
-      tick();
-      const childFinal = fixture.nativeElement.querySelector('.child');
-      expect(childFinal).toBeNull();
-    }
-  }));
-
-  it('should support nested animate.leave with component host binding (GitHub #66476)', fakeAsync(() => {
-    // Reproduction from https://github.com/angular/angular/issues/66476
-    // Structure: Host -> @if -> Child -> Popup (with host animation)
-
-    const styles = `
-      .popup-overlay {
-        animation: fade-in 0.3s;
-      }
-      .popup-overlay-leave {
-        animation: fade-out 0.3s;
-      }
-      @keyframes fade-in {
-        from { opacity: 0; }
-        to { opacity: 1; }
-      }
-      @keyframes fade-out {
-        from { opacity: 1; }
-        to { opacity: 0; }
-      }
-    `;
-
-    @Component({
-      selector: 'app-popup',
-      template: `
-        <div class="popup-overlay" animate.leave="popup-overlay-leave">
-          <div class="popup">
-            <ng-content></ng-content>
-          </div>
-        </div>
-      `,
-      styles: [styles],
-      encapsulation: ViewEncapsulation.None,
-      host: {
-        '(animate.leave)': 'animateLeave($event)',
-      },
-    })
-    class PopupComponent {
-      animateLeave(event: any) {
-        // In the issue, they use setTimeout to call animationComplete.
-        // We simulate this async completion.
-        setTimeout(() => event.animationComplete(), 300);
-      }
-    }
-
-    @Component({
-      selector: 'app-child',
-      template: ` <app-popup> Projected content. </app-popup> `,
-      imports: [PopupComponent],
-    })
-    class ChildComponent {}
-
-    @Component({
-      selector: 'app-host',
-      template: `
-        @if (showChild()) {
-          <app-child></app-child>
-        }
-      `,
-      imports: [ChildComponent],
-    })
-    class HostComponent {
-      showChild = signal(true);
-    }
-
-    TestBed.configureTestingModule({animationsEnabled: true});
-    const fixture = TestBed.createComponent(HostComponent);
-    const host = fixture.componentInstance;
-    fixture.detectChanges();
-
-    const popup = fixture.nativeElement.querySelector('app-popup');
-    expect(popup).toBeTruthy();
-
-    host.showChild.set(false);
-    fixture.detectChanges();
-    tickAnimationFrames(1);
-
-    const popupAfter = fixture.nativeElement.querySelector('app-popup');
-    expect(popupAfter).withContext('Popup should persist due to host animation').not.toBeNull();
-
-    // Advance time for the setTimeout in animateLeave
-    tick(300);
-
-    // The nested animation needs to complete as well.
-    // Query the nested element (popup overlay) that has the animation.
-    const popupOverlay = fixture.nativeElement.querySelector('.popup-overlay');
-    if (popupOverlay) {
-      popupOverlay.dispatchEvent(
-        new AnimationEvent('animationend', {animationName: 'fade-out', bubbles: true}),
-      );
-      tick();
-    }
-
-    // Attempt to verify removal
-    const popupFinal = fixture.nativeElement.querySelector('app-popup');
-    expect(popupFinal).toBeFalsy();
-  }));
-
-  it('should not throw "Injector destroyed" when a parent with leave animations is destroyed with nested components', async () => {
-    @Component({
-      selector: 'child-comp',
-      standalone: true,
-      template: '<div>Child</div>',
-    })
-    class ChildComp implements OnDestroy {
-      ngOnDestroy() {}
-    }
-
-    @Component({
-      selector: 'parent-comp',
-      standalone: true,
-      imports: [ChildComp],
-      template: `
-        <div animate.leave="leaving">
-          <child-comp />
-        </div>
-      `,
-    })
-    class ParentComp {
-      leaving = () => ({promise: Promise.resolve()});
-    }
-
-    TestBed.configureTestingModule({});
-
-    const fixture = TestBed.createComponent(ParentComp);
-    fixture.detectChanges();
-
-    // Before the fix, the framework would recursively dive into ChildComp's
-    // internal view to collect animations. During a full destruction of the
-    // component tree, this could lead to starting animations or async tasks
-    // that resolve after the component's injector is already gone.
-    fixture.destroy();
-
-    // If we reach here without an exception, the regression is prevented.
-  });
-
-  it('should still support nested animations within the same template', () => {
-    // This test ensures that while we stopped recursing into component views,
-    // we still support nested elements within the same view having animations.
-
-    @Component({
-      selector: 'nested-view-comp',
-      standalone: true,
-      template: `
-        <div animate.leave="leaving">
-          @if (showNested) {
-            <div animate.leave="leaving">Nested</div>
-          }
-        </div>
-      `,
-    })
-    class NestedViewComp {
-      showNested = true;
-      leaving = () => ({promise: Promise.resolve()});
-    }
-
-    TestBed.configureTestingModule({});
-
-    const fixture = TestBed.createComponent(NestedViewComp);
-    fixture.detectChanges();
-
-    // This should not throw and correctly handle the nested animations.
-    fixture.destroy();
-  });
-});
diff --git a/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json b/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
index 1e2a614c8026..917bc6efac95 100644
--- a/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/animations-standalone/bundle.golden_symbols.json
@@ -323,7 +323,6 @@
       "addServerStyles",
       "addToAnimationQueue",
       "addToEndOfViewTree",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -371,10 +370,8 @@
       "cleanUpView",
       "cloakAndComputeStyles",
       "cloakElement",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "computeStaticStyling",
       "computeStyle",
       "concatStringsWithSpace",
@@ -465,7 +462,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeOnDestroys",
       "executeTemplate",
       "executeViewQueryFn",
diff --git a/packages/core/test/bundling/create_component/bundle.golden_symbols.json b/packages/core/test/bundling/create_component/bundle.golden_symbols.json
index 7d8d2d8870a6..a8f4a1779d51 100644
--- a/packages/core/test/bundling/create_component/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/create_component/bundle.golden_symbols.json
@@ -252,7 +252,6 @@
       "addToArray",
       "addToEndOfViewTree",
       "addViewToDOM",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -287,10 +286,8 @@
       "captureError",
       "checkStable",
       "cleanUpView",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "computeStaticStyling",
       "concatStringsWithSpace",
       "config",
@@ -372,7 +369,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeListenerWithErrorHandling",
       "executeOnDestroys",
       "executeTemplate",
diff --git a/packages/core/test/bundling/defer/bundle.golden_symbols.json b/packages/core/test/bundling/defer/bundle.golden_symbols.json
index 7791739e5736..e22a30add6bb 100644
--- a/packages/core/test/bundling/defer/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/defer/bundle.golden_symbols.json
@@ -296,7 +296,6 @@
       "addToArray",
       "addToEndOfViewTree",
       "addViewToDOM",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -332,10 +331,8 @@
       "checkStable",
       "classIndexOf",
       "cleanUpView",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "computeStaticStyling",
       "concatStringsWithSpace",
       "config",
@@ -414,7 +411,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeOnDestroys",
       "executeTemplate",
       "executeViewQueryFn",
diff --git a/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json b/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
index 45b817082153..d3d1052ac254 100644
--- a/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/forms_reactive/bundle.golden_symbols.json
@@ -351,7 +351,6 @@
       "addToEndOfViewTree",
       "addValidators",
       "addViewToDOM",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -401,10 +400,8 @@
       "cleanUpView",
       "coerceToAsyncValidator",
       "coerceToValidator",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "collectResidual",
       "collectStylingFromDirectives",
       "collectStylingFromTAttrs",
@@ -510,7 +507,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeListenerWithErrorHandling",
       "executeOnDestroys",
       "executeSchedule",
diff --git a/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json b/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
index 864a6b1287f5..d4252ae9c7c3 100644
--- a/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/forms_template_driven/bundle.golden_symbols.json
@@ -355,7 +355,6 @@
       "addToEndOfViewTree",
       "addValidators",
       "addViewToDOM",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -403,10 +402,8 @@
       "cleanUpView",
       "coerceToAsyncValidator",
       "coerceToValidator",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "collectResidual",
       "collectStylingFromDirectives",
       "collectStylingFromTAttrs",
@@ -512,7 +509,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeListenerWithErrorHandling",
       "executeOnDestroys",
       "executeSchedule",
diff --git a/packages/core/test/bundling/hydration/bundle.golden_symbols.json b/packages/core/test/bundling/hydration/bundle.golden_symbols.json
index 369084e003ac..229a34850d13 100644
--- a/packages/core/test/bundling/hydration/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/hydration/bundle.golden_symbols.json
@@ -292,7 +292,6 @@
       "addServerStyles",
       "addToAnimationQueue",
       "addToEndOfViewTree",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -336,10 +335,8 @@
       "cleanupLView",
       "cleanupMatchingDehydratedViews",
       "clearElementContents",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "computeStaticStyling",
       "concatStringsWithSpace",
       "config",
@@ -429,7 +426,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeOnDestroys",
       "executeSchedule",
       "executeTemplate",
diff --git a/packages/core/test/bundling/router/bundle.golden_symbols.json b/packages/core/test/bundling/router/bundle.golden_symbols.json
index c3f67d863dc7..933a012c84a5 100644
--- a/packages/core/test/bundling/router/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/router/bundle.golden_symbols.json
@@ -407,7 +407,6 @@
       "addViewToDOM",
       "advanceActivatedRoute",
       "afterNextNavigation",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -451,10 +450,8 @@
       "checkStable",
       "classIndexOf",
       "cleanUpView",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "collectQueryResults",
       "combineLatest",
       "combineLatestInit",
@@ -604,7 +601,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeListenerWithErrorHandling",
       "executeOnDestroys",
       "executeSchedule",
diff --git a/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json b/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
index d3510adff1f2..a23ff106fe6d 100644
--- a/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/standalone_bootstrap/bundle.golden_symbols.json
@@ -233,7 +233,6 @@
       "addServerStyles",
       "addToAnimationQueue",
       "addToEndOfViewTree",
-      "aggregateDescendantAnimations",
       "allLeavingAnimations",
       "allocExpando",
       "allocLFrame",
@@ -267,10 +266,8 @@
       "captureError",
       "checkStable",
       "cleanUpView",
-      "collectAllViewLeaveAnimations",
       "collectNativeNodes",
       "collectNativeNodesInLContainer",
-      "collectNestedViewAnimations",
       "computeStaticStyling",
       "concatStringsWithSpace",
       "config",
@@ -344,7 +341,6 @@
       "executeCheckHooks",
       "executeContentQueries",
       "executeInitAndCheckHooks",
-      "executeLeaveAnimations",
       "executeOnDestroys",
       "executeTemplate",
       "executeViewQueryFn",