fix(design): connect video preparation and playable history

tests/unit/image-workspace-store.test.ts

@@ -1427,7 +1427,7 @@ describe('V2 Living Form store', () => {
     expect(useImageWorkspaceStore.getState().workspace?.form.specificationRevision).toBe(4);
   });
 
-  it('treats a terminal quote-blocked response as definitive instead of unknown', async () => {
+  it('stops before quoting when preparation fails even without a blocker event', async () => {
     await loadedStore();
     submitCommandMock.mockRejectedValueOnce(new ImageWorkspaceApiError(
       422,
@@ -1441,7 +1441,11 @@ describe('V2 Living Form store', () => {
     });
 
     expect(useImageWorkspaceStore.getState().pendingOperations).toEqual({});
-    expect(useImageWorkspaceStore.getState().error).toBeNull();
+    expect(useImageWorkspaceStore.getState().error).toBe('方案还没整理好，请稍后重试');
+    expect(submitCommandMock).toHaveBeenCalledTimes(1);
+    expect(submitCommandMock).toHaveBeenCalledWith(expect.objectContaining({
+      kind: 'apply_input', input: { kind: 'prepare_generation', operations: [] },
+    }));
   });
 
   it('settles an unknown quote from its blocked event, then allows a revised Quote', async () => {
@@ -1528,14 +1532,23 @@ describe('V2 Living Form store', () => {
 
   it('retains an uncertain accepted write and retries the exact same command identity', async () => {
     await loadedStore();
-    submitCommandMock.mockRejectedValueOnce(new Error('network disconnected'));
+    operationIdMock
+      .mockReturnValueOnce('operation-prepare')
+      .mockReturnValueOnce('operation-quote');
+    submitCommandMock
+      .mockResolvedValueOnce({
+        clientOperationId: 'operation-prepare',
+        runId: 'run-prepare',
+        workspace: designWorkspaceFixture(),
+      })
+      .mockRejectedValueOnce(new Error('network disconnected'));
 
     await expect(useImageWorkspaceStore.getState().requestQuote()).rejects.toThrow(
       'network disconnected',
     );
-    const pending = useImageWorkspaceStore.getState().pendingOperations['operation-1'];
+    const pending = useImageWorkspaceStore.getState().pendingOperations['operation-quote'];
     expect(pending).toMatchObject({
-      id: 'operation-1',
+      id: 'operation-quote',
       status: 'unknown',
       command: {
         kind: 'request_quote',
@@ -1545,13 +1558,13 @@ describe('V2 Living Form store', () => {
     });
 
     submitCommandMock.mockResolvedValueOnce({
-      clientOperationId: 'operation-1',
+      clientOperationId: 'operation-quote',
       runId: 'run-original',
       workspace: designWorkspaceFixture(),
     });
-    await useImageWorkspaceStore.getState().retryOperation('operation-1');
+    await useImageWorkspaceStore.getState().retryOperation('operation-quote');
 
-    expect(submitCommandMock).toHaveBeenNthCalledWith(2, pending.command);
+    expect(submitCommandMock).toHaveBeenLastCalledWith(pending?.command);
     expect(useImageWorkspaceStore.getState().pendingOperations).toEqual({});
   });