diff --git a/apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts b/apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts
index e4094c7fb..da5894660 100644
--- a/apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts
+++ b/apps/ai-game-creator-shell/src/view/ui-editor/useUiEditorPage.ts
@@ -42,6 +42,7 @@ import {
   useUiEditorState,
 } from '../../features/ui-editor/useUiEditorState';
 import {
+  cancelLocalProjectResourcePreviewScope,
   createProjectResourcePreviewRequestId,
   createProjectResourcePreviewScopeId,
 } from '../../services/projectResourcePreviewTransport';
@@ -242,6 +243,7 @@ export function useUiEditorSession(
       return;
     }
     let cancelled = false;
+    let previewScopeId: string | null = null;
     setIsLoading(true);
     setLoadError(null);
     setPersistedRevision(null);
@@ -263,7 +265,8 @@ export function useUiEditorSession(
           setSavedStateSignature(JSON.stringify(state));
           setSaveError(null);
           if (projectPath) {
-            const scopeId = createProjectResourcePreviewScopeId();
+            previewScopeId = createProjectResourcePreviewScopeId();
+            const scopeId = previewScopeId;
             const resources = [
               ...Object.entries(state.ui_design_images).map(([id, image]) => ({
                 id,
@@ -320,6 +323,9 @@ export function useUiEditorSession(
       });
     return () => {
       cancelled = true;
+      if (previewScopeId) {
+        cancelLocalProjectResourcePreviewScope(previewScopeId);
+      }
     };
   }, [projectPath, replaceEditorState, resourceId, stateStore]);
 
diff --git a/apps/ai-game-creator-shell/tests/uiEditorPage.test.ts b/apps/ai-game-creator-shell/tests/uiEditorPage.test.ts
index 832dbc3ca..2bfe26d0f 100644
--- a/apps/ai-game-creator-shell/tests/uiEditorPage.test.ts
+++ b/apps/ai-game-creator-shell/tests/uiEditorPage.test.ts
@@ -145,6 +145,93 @@ async function renderLoadedSession(state: State) {
 }
 
 describe('UiEditorPage', () => {
+  it('cancels image preview scopes when the resource changes and on unmount', async () => {
+    vi.mocked(invoke)
+      .mockReset()
+      .mockImplementation(async (command) => {
+        if (command === 'read_local_project_image_preview') {
+          return { dataUrl: 'data:image/png;base64,cHJldmlldw==' };
+        }
+        return undefined;
+      });
+    Object.defineProperty(window, '__TAURI__', {
+      configurable: true,
+      value: { core: { invoke } },
+    });
+    const stateStore: UiDesignStateStore = {
+      load: vi.fn().mockResolvedValue({
+        revision: 0,
+        state: stateWithPages(['page']),
+      }),
+      save: vi.fn(),
+    };
+    const hook = renderHook(
+      ({ resourceId }) =>
+        useUiEditorSession('/tmp/ui-editor', resourceId, stateStore),
+      { initialProps: { resourceId: 'ui-resource-a' } },
+    );
+
+    await waitFor(() =>
+      expect(invoke).toHaveBeenCalledWith(
+        'read_local_project_image_preview',
+        expect.objectContaining({ scopeId: expect.any(String) }),
+      ),
+    );
+    const firstScopeId = vi
+      .mocked(invoke)
+      .mock.calls.find(
+        ([command]) => command === 'read_local_project_image_preview',
+      )?.[1]?.scopeId;
+
+    hook.rerender({ resourceId: 'ui-resource-b' });
+    await waitFor(() =>
+      expect(invoke).toHaveBeenCalledWith(
+        'cancel_local_project_resource_preview_scope',
+        { scopeId: firstScopeId },
+      ),
+    );
+    await waitFor(() =>
+      expect(
+        vi
+          .mocked(invoke)
+          .mock.calls.filter(
+            ([command]) => command === 'read_local_project_image_preview',
+          ),
+      ).toHaveLength(4),
+    );
+    const secondScopeId = vi
+      .mocked(invoke)
+      .mock.calls.filter(
+        ([command]) => command === 'read_local_project_image_preview',
+      )
+      .at(-1)?.[1]?.scopeId;
+
+    hook.unmount();
+
+    expect(invoke).toHaveBeenCalledWith(
+      'cancel_local_project_resource_preview_scope',
+      { scopeId: secondScopeId },
+    );
+  });
+
+  it('does not cancel a preview scope before state loading creates one', () => {
+    vi.mocked(invoke).mockClear();
+    const stateStore: UiDesignStateStore = {
+      load: vi.fn(() => new Promise(() => undefined)),
+      save: vi.fn(),
+    };
+    const hook = renderHook(() =>
+      useUiEditorSession('/tmp/ui-editor', 'ui-resource', stateStore),
+    );
+
+    hook.unmount();
+
+    expect(invoke).not.toHaveBeenCalledWith(
+      'cancel_local_project_resource_preview_scope',
+      expect.anything(),
+    );
+  });
+
   it('uses the durable Tauri store for a project UI resource', async () => {
     vi.mocked(invoke)
       .mockResolvedValueOnce({
diff --git a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
index 60470067e..26a608321 100644
--- a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
+++ b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
@@ -1171,6 +1171,10 @@ game-project/
 - UI State 原子安装保留最近一个可解析、canonical 的 `.previous` 恢复候选，作为最佳努力恢复来源；写入主文件前不把完整 State 语义校验重复执行一遍。主文件损坏时，恢复候选仍必须通过同一严格 schema、project/asset identity、revision、引用和 State 校验后才能安装；恢复安装与保存共用项目写锁，并在持锁后重新读取主文件，已有并发保存的有效新版本时直接返回而不安装旧副本。任一候选均不可信则停在加载错误，前端禁编辑和保存。新建 UI 资源先登记并安装合法 envelope，任一步失败补偿 manifest/文件，避免把空 JSON 留给资源卡。
 - 图片路径只需是安全项目相对路径，不要求外部图片仍存在或已登记为 manifest asset；缺失媒体只导致 preview 占位。`imageOrder`、当前选择、缩放、面板开关和 preview URL 不写入 State，加载后由 State 派生。保存冻结提交快照，保存期间的新编辑继续保持 dirty；AI state lock 和加载期间禁保存。
 
+## 2026-08-20 UI Editor 本地图片预览作用域处置
+
+- UI Editor 每次成功加载 State 后为当前本地图片预览批次创建独立 `scopeId`。切换项目、切换 UI 资源或卸载时，清理逻辑必须先失效前端 ownership fence，再调用 `cancel_local_project_resource_preview_scope` 取消该批次已排队或在途的原生读取；加载完成前尚未创建 scope 时不得发出空取消。旧 scope 的迟到结果不得更新当前 preview URL，回归测试同时覆盖资源切换与卸载。
+
 ## 2026-08-18 UI Editor 新建节点组件状态
 
 - 所有非组件绑定流程创建的 UI Editor 节点，`components_status` 与 `layout_status` 一致初始化为 `NoProblem`，覆盖前端新建页面根 / 人工节点，以及 Rust 结构识别与合并产生的节点。组件绑定命令仍只对 LLM 显式返回的节点写入其 `NoProblem` 或 `NeedReview` 结果；未返回的节点状态不变。