fix(api): 文本回放 - 增加增量配额与生命周期清理 (#144)

Closes #144

web/src/services/api/task-center.ts

@@ -30,6 +30,7 @@ export type GenerationTask = {
     previewKind?: "image" | "video";
     inputJson?: string;
     resultJson?: string;
+    textDraft?: string;
     error?: string;
     attempts: number;
     startedAt?: string;
@@ -57,6 +58,23 @@ export type ProviderTaskQueryResult = {
     billingSettled: boolean;
 };
 
+export type TaskTextDelta = {
+    id: string;
+    taskId: string;
+    sequence: number;
+    content: string;
+    byteCount: number;
+    createdAt: string;
+    expiresAt: string;
+};
+
+export type TaskTextReplay = {
+    deltas: TaskTextDelta[];
+    textDraft?: string;
+    finalText?: string;
+    complete: boolean;
+};
+
 export type AgentSession = {
     id: string;
     projectId?: string;
@@ -199,6 +217,14 @@ export function queryGenerationTask(id: string, options?: { signal?: AbortSignal
     return request<GenerationTask>(api.get(`/tasks/${encodeURIComponent(id)}`, { signal: options?.signal }));
 }
 
+export function appendTaskTextDelta(id: string, content: string) {
+    return request<TaskTextDelta>(api.post(`/tasks/${encodeURIComponent(id)}/text-deltas`, { content }));
+}
+
+export function queryTaskTextReplay(id: string, after = 0) {
+    return request<TaskTextReplay>(api.get(`/tasks/${encodeURIComponent(id)}/text-deltas`, { params: { after } }));
+}
+
 export function retryGenerationTask(id: string) {
     return request<GenerationTask>(api.post(`/tasks/${encodeURIComponent(id)}/retry`));
 }