fix: prune missing image indexes and align instance creation payload

web/src/CreateInstance.tsx

@@ -16,7 +16,7 @@ export function CreateInstance({close, refresh}: {close: () => void; refresh: ()
       if (!active.current) return;
       if (!image) throw new Error('请选择可用的本地镜像。');
       setProgress('正在创建实例，请勿重复提交…');
-      const created = await api.request<Instance>('/instances', 'POST', {name, image_id:image.image_id || image.id, version:image.version});
+      const created = await api.request<Instance>('/instances', 'POST', {name, image_id:image.image_id || image.id});
       if (!created?.id) throw new Error('未收到实例确认，请刷新实例列表核实，勿重复提交。');
       if (active.current) {await refresh(); close();}
     });

web/src/Images.test.tsx

@@ -50,7 +50,7 @@ it('requires evidence and confirmation; cancel sends no admission mutation', ()
   form.props.onSubmit({preventDefault:vi.fn()});
   expect(window.confirm).toHaveBeenCalledOnce(); expect(request).not.toHaveBeenCalled();
 });
-it('creates only the selected verified exact image without build or intent requests', async () => {
+it('creates with only name and exact image ID, leaving version resolution to the server', async () => {
   const request = vi.spyOn(api, 'request').mockResolvedValue({id:'created'});
   vi.stubGlobal('FormData', class {get(key: string) {return key === 'image' ? 'ok' : 'name';}});
   const close = vi.fn(), refresh = vi.fn(async () => {});
@@ -58,7 +58,7 @@ it('creates only the selected verified exact image without build or intent reque
   expect(nodes(form, n => n.type === 'select')).toHaveLength(1);
   expect(nodes(form, n => n.type === 'option' && n.props.value === 'exp')).toHaveLength(0);
   await form.props.onSubmit({preventDefault:vi.fn(), currentTarget:{}});
-  expect(request.mock.calls).toEqual([['/instances', 'POST', {name:'name', image_id:'ok', version:'1.2.3'}]]);
+  expect(request.mock.calls).toEqual([['/instances', 'POST', {name:'name', image_id:'ok'}]]);
   expect(refresh).toHaveBeenCalledOnce(); expect(close).toHaveBeenCalledOnce();
 });
 it('directs users to an administrator and disables creation when no verified image exists', async () => {