fix(create): 文本生成任务 - 恢复终态正文并停止错误的生成中状态

web/src/services/creation-text-task-recovery.ts

@@ -0,0 +1,43 @@
+import { parseBackendGenerationResult } from "@/services/api/generation-task";
+import type { GenerationTask } from "@/services/api/task-center";
+
+export type RecoverableCreationTextMessage = {
+    mode?: string;
+    status?: string;
+    content: string;
+    error?: string;
+    taskIds?: string[];
+};
+
+export type CreationTextTaskRecovery = {
+    status: "done" | "error" | "cancelled";
+    content: string;
+    error?: string;
+    taskIds: string[];
+};
+
+// 页面重载后只依赖后端任务终态恢复消息，不复用已经中断的浏览器请求。
+export function recoverCreationTextTask(message: RecoverableCreationTextMessage, tasks: GenerationTask[]): CreationTextTaskRecovery | null {
+    if (message.mode !== "text" || (message.status !== "streaming" && message.status !== "pending")) return null;
+
+    const taskIds = new Set(message.taskIds || []);
+    const matches = tasks.filter((task) => taskIds.has(task.id));
+    if (!matches.length || matches.some((task) => task.status === "queued" || task.status === "running")) return null;
+
+    const nextTaskIds = Array.from(new Set([...(message.taskIds || []), ...matches.map((task) => task.id)]));
+    const succeeded = matches.find((task) => task.status === "succeeded");
+    if (succeeded) {
+        try {
+            const text = parseBackendGenerationResult(succeeded).text;
+            if (!text?.trim()) throw new Error("后端任务没有返回文本");
+            return { status: "done", content: text, error: undefined, taskIds: nextTaskIds };
+        } catch (error) {
+            return { status: "error", content: "生成失败", error: error instanceof Error ? error.message : "文本任务结果格式错误", taskIds: nextTaskIds };
+        }
+    }
+    if (matches.every((task) => task.status === "cancelled")) {
+        return { status: "cancelled", content: "已停止", error: undefined, taskIds: nextTaskIds };
+    }
+    const failed = matches.find((task) => task.status === "failed");
+    return { status: "error", content: "生成失败", error: failed?.error || "文本任务已失败", taskIds: nextTaskIds };
+}