feat(multimodal): 完成阶段F运行管理与收尾验收

frontend/src/services/mediaService.ts

@@ -18,15 +18,33 @@ export const mediaService = {
     revision: job.revision, text: job.text, segments: job.segments, speaker_names: job.speaker_names,
   }),
   revisions: (id: string) => apiClient.get<{items: MediaJob[]}>(`/api/media/transcriptions/${encodeURIComponent(id)}/revisions`),
-  note: (id: string, title: string) => apiClient.post<{note_id: string; title: string}>(`/api/media/transcriptions/${encodeURIComponent(id)}/notes`, { title }),
+  note: (id: string, title: string, update_existing = false) => apiClient.post<{note_id: string; title: string}>(`/api/media/transcriptions/${encodeURIComponent(id)}/notes`, { title, update_existing }),
   audio: (id: string) => resolveApiUrl(`/api/media/attachments/${encodeURIComponent(id)}`),
   impact: (id: string) => apiClient.get<{message:string;retained_note_ids:string[]}>(`/api/media/attachments/${encodeURIComponent(id)}/cleanup-impact`),
   purge: (id: string) => apiClient.delete(`/api/media/attachments/${encodeURIComponent(id)}`),
-  async upload(file: File) {
+  async upload(file: File, idempotencyKey?: string) {
     const response = await fetch(resolveApiUrl(`/api/media/attachments?filename=${encodeURIComponent(file.name)}`), {
-      method: 'POST', headers: {'Content-Type': 'application/octet-stream'}, body: file,
+      method: 'POST', headers: {'Content-Type': 'application/octet-stream', ...(idempotencyKey ? {'Idempotency-Key': idempotencyKey} : {})}, body: file,
     })
     if (!response.ok) throw new Error((await response.json())?.error?.message || '附件上传失败')
     return await response.json() as {attachment_id: string}
   },
 }
+
+// Keep one identity until the input/options change, including a lost HTTP response.
+// Payloads remain in memory; durable uploads/jobs are owned by the backend.
+export function createMediaSubmission() {
+  let pending: {file: File; options: string; uploadKey: string; jobKey: string; attachmentId?: string} | null = null
+  return {
+    reset() { pending = null },
+    async submit(file: File, options: Record<string, unknown>) {
+      const serialized = JSON.stringify(options)
+      if (!pending || pending.file !== file || pending.options !== serialized) {
+        pending = {file, options: serialized, uploadKey: crypto.randomUUID(), jobKey: crypto.randomUUID()}
+      }
+      const current = pending
+      if (!current.attachmentId) current.attachmentId = (await mediaService.upload(file, current.uploadKey)).attachment_id
+      return mediaService.create({...JSON.parse(current.options), attachment_id: current.attachmentId, idempotency_key: current.jobKey})
+    },
+  }
+}