feat(extensions): 取消原生暂存并暴露持久提交状态

frontend/src/features/community/CommunityView.vue

@@ -76,7 +76,7 @@ function install() {
   const selected = detail.value, selectedRegistry = source()
   void run(async (signal, current) => {
     const result = await installRelease(selectedRegistry, selected, signal)
-    if (current()) { notice.value = result; refreshCandidates() }
+    if (current() || (signal.aborted && controller?.signal === signal)) { notice.value = result; refreshCandidates() }
   })
 }
 function toggleSource() {

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   expect(args.request.release).not.toHaveProperty('withdrawn')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' })
+})

frontend/src/services/communityService.ts

@@ -96,8 +96,21 @@ export async function installRelease(source: CommunitySource, selected: Communit
     if (!source.enabled || selected.withdrawn) throw new Error('来源已停用或发行已撤回')
     const release = { ...selected } as Partial<CommunityRelease>
     delete release.release_id; delete release.withdrawn; delete release.download_path
-    await invoke('extension_stage', { request: { operation_id: crypto.randomUUID(), source: source.url, release } })
-    return '已校验并暂存到桌面安装库，尚未安装或启用'
+    const operationId = crypto.randomUUID()
+    const requestId = await invoke<string>('extension_stage_prepare')
+    const cancel = () => { void invoke('extension_stage_cancel', { requestId }).catch(() => undefined) }
+    signal?.addEventListener('abort', cancel, { once: true })
+    try {
+      if (signal?.aborted) { cancel(); signal.throwIfAborted() }
+      await invoke('extension_stage', { request: { request_id: requestId, operation_id: operationId, source: source.url, release } })
+      return '已校验并暂存到桌面安装库，尚未安装或启用'
+    } catch (error) {
+      if (signal?.aborted) {
+        const receipt = await invoke<{ state: string } | null>('extension_stage_status', { operationId }).catch(() => null)
+        if (receipt?.state === 'staged') return '取消前已完成暂存，尚未安装或启用'
+      }
+      throw error
+    } finally { signal?.removeEventListener('abort', cancel); cancel() }
   }
   const catalog = await fetchCatalog(source, '', selected.type, signal)
   const release = catalog.items.find(item => item.release_id === selected.release_id)