feat(extensions): 取消原生暂存并暴露持久提交状态

frontend/src/services/communityDesktop.spec.ts

@@ -8,12 +8,12 @@ import type { CommunityRelease, CommunitySource } from '@/contracts/community'
 afterEach(() => { vi.unstubAllGlobals(); native.invoke.mockReset() })
 it('desktop stages through Host without renderer download or legacy installation', async () => {
   const fetch = vi.fn(); vi.stubGlobal('fetch', fetch)
-  native.invoke.mockResolvedValue({ state: 'staged' })
+  native.invoke.mockImplementation(async command => command === 'extension_stage_prepare' ? 'request-id' : { state: 'staged' })
   const source: CommunitySource = { id: 'fixture', url: 'https://catalog.example/', keys: [], enabled: true }
   const release = vector.release as CommunityRelease
   expect(await installRelease(source, release)).toContain('尚未安装或启用')
   expect(fetch).not.toHaveBeenCalled()
-  const [command, args] = native.invoke.mock.calls[0]!
+  const [command, args] = native.invoke.mock.calls.find(call => call[0] === 'extension_stage')!
   expect(command).toBe('extension_stage')
   expect(args.request.release.signature).toBe(release.signature)
   expect(args.request.release).not.toHaveProperty('withdrawn')
@@ -21,3 +21,14 @@ it('desktop stages through Host without renderer download or legacy installation
   expect(args.request.release).not.toHaveProperty('release_id')
   expect(vector.release).toHaveProperty('release_id')
 })
+
+it('cancels a prepared request when abort wins before dispatch', async () => {
+  const controller = new AbortController()
+  native.invoke.mockImplementation(async command => {
+    if (command === 'extension_stage_prepare') { controller.abort(); return 'request-id' }
+    return null
+  })
+  await expect(installRelease({ id: 'fixture', url: 'https://catalog.example/', keys: [], enabled: true }, vector.release as CommunityRelease, controller.signal)).rejects.toThrow()
+  expect(native.invoke.mock.calls.some(call => call[0] === 'extension_stage')).toBe(false)
+  expect(native.invoke).toHaveBeenCalledWith('extension_stage_cancel', { requestId: 'request-id' })
+})