refactor(generate): 去掉30秒轮询，from-assets秒级返回后直接生成

- 删除 waitForClipsCreated 轮询逻辑（30s等待、1.5s间隔）
- handleGenerate 改为单次 listClips 兜底检查，无片段则补调 from-assets
- 后端已改异步秒级返回，前端无需长时间等待
- 生成前显示 loading '正在生成预览视频...'
- useStep2Materials 错误提示统一为'智能选片失败，请重试'
- 注释更新：反映后端异步行为

apps/web/src/pages/generate/hooks/useGenerateVideo.ts

@@ -4,7 +4,7 @@
  */
 import { useState, useCallback } from "react"
 import { message } from "antd"
-import { type GeneratedVideo, getEditPlanClips } from "@/api/template-editor"
+import { type GeneratedVideo, getEditPlanClips, createClipsFromAssets } from "@/api/template-editor"
 import { createGenerationTask } from "@/api/tasks/tasks"
 import type { UseGenerateVideoProps } from "./generate-video/types"
 import { getGenerationPhase } from "./generate-video/phase"
@@ -13,14 +13,6 @@ import { validateGenerateInputs } from "./generate-video/buildPayload"
 import { calculateResolution } from "../utils/calculateResolution"
 import { extractBackendError, translateError } from "./generate-video/errorUtils"
 
-/**
- * 片段创建轮询：最多等 30 秒。
- * useStep2Materials 在用户选素材时（debounce 800ms）已调用 from-assets，
- * 这里只做轻量校验，确认片段已落库就放行，不死等 ready。
- */
-const CLIPS_CREATED_MAX_WAIT_MS = 30_000
-const CLIPS_CREATED_POLL_INTERVAL_MS = 1_500
-
 export function useGenerateVideo(props: UseGenerateVideoProps) {
   const { selectedTemplate, onGenerationSuccess } = props
 
@@ -52,28 +44,6 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
     onFailed: handleFailed,
   })
 
-  /**
-   * 轮询确认片段已被创建。
-   * useStep2Materials 在用户选素材时已调用 from-assets 创建片段，
-   * 这里只要该 plan 下存在任意 clips（无论 ready/pending），就立即放行 generate。
-   * 片段是否 ready 由后端生成流程自行等待/兜底，前端不死等 ready，避免：
-   *   1. MediaKit 失败时前端卡死无法生成
-   *   2. E2E/弱网环境下 generate 请求迟迟不发出
-   * 30s 仍查不到片段也放行，由后端返回明确错误。
-   */
-  const waitForClipsCreated = useCallback(async (templateId: string): Promise<void> => {
-    const start = Date.now()
-    while (Date.now() - start < CLIPS_CREATED_MAX_WAIT_MS) {
-      try {
-        const clipList = await getEditPlanClips(templateId, { limit: 500 })
-        if (clipList.items.length > 0) return
-      } catch {
-        // 单次查询失败不终止，继续轮询
-      }
-      await new Promise((resolve) => setTimeout(resolve, CLIPS_CREATED_POLL_INTERVAL_MS))
-    }
-  }, [])
-
   /* ── 生成视频 ── */
   const generate = useCallback(async () => {
     const errorMsg = validateGenerateInputs(props)
@@ -96,18 +66,24 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
       const assetIds =
         props.materialMode === "auto" ? props.smartSelectedIds : props.selectedMaterials
 
-      // from-assets 已由 useStep2Materials 在用户选素材时（debounce 800ms）调用。
-      // 这里轻量确认片段已落库，再发 generate；最多等 30s，超时也放行。
-      // 片段 ready 状态由后端生成流程兜底，前端不死等。
+      // from-assets 已由 useStep2Materials 在用户选素材时（debounce 800ms）调用，
+      // 后端已改为异步秒级返回，这里做一次轻量兜底：
+      // 单次查 clips，已有则直接放行；没有则再调一次 from-assets。
       if (assetIds.length > 0 && selectedTemplate) {
-        const hide = message.loading("正在准备素材片段...", 0)
         try {
-          await waitForClipsCreated(selectedTemplate)
-        } finally {
-          hide()
+          const clipList = await getEditPlanClips(selectedTemplate, { limit: 500 })
+          if (clipList.items.length === 0) {
+            // 片段不存在（极端情况：useStep2Materials 的 debounce 还没触发）
+            // 手动补一次 from-assets（后端秒级返回）
+            await createClipsFromAssets(selectedTemplate, assetIds, "main")
+          }
+        } catch {
+          // 查询失败不阻塞，继续生成
         }
       }
 
+      const hide = message.loading("正在生成预览视频...", 0)
+
       const coverUrl = props.coverSettings?.thumbnail_url || props.coverSettings?.upload_url || ""
 
       const voiceLibraryId =
@@ -115,43 +91,49 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
           ? props.selectedClonedVoice || props.selectedVoice || ""
           : props.selectedVoice || ""
 
-      const taskResp = await createGenerationTask({
-        template_id: selectedTemplate,
-        asset_ids: assetIds,
-        output_width: outputWidth,
-        output_height: outputHeight,
-        cover_url: coverUrl,
-        custom_title: props.titleSettings?.title || "",
-        duration: props.duration || undefined,
-        video_ratio: props.videoRatio,
-        voice_library_id: voiceLibraryId,
-        ...(props.selectedVoice && !voiceLibraryId ? { voice_ids: [props.selectedVoice] } : {}),
-        bgm_config: {
-          enabled: props.bgm !== false,
-          ...(props.bgmConfig?.music_id ? { preset_id: props.bgmConfig.music_id } : {}),
-        },
-        ...(props.sourceEditPlanId ? { source_edit_plan_id: props.sourceEditPlanId } : {}),
-        ...(props.titleSettings?.title
-          ? {
-              title_config: {
-                text: props.titleSettings.title,
-                font: props.titleSettings.font,
-                font_size: props.titleSettings.size,
-                font_color: props.titleSettings.color,
-                position: props.titleSettings.position,
-                bold: props.titleSettings.bold,
-                stroke: props.titleSettings.stroke,
-                shadow: props.titleSettings.shadow,
-              },
-            }
-          : {}),
-      })
-      const taskId = taskResp.items?.[0]?.id
+      try {
+        const taskResp = await createGenerationTask({
+          template_id: selectedTemplate,
+          asset_ids: assetIds,
+          output_width: outputWidth,
+          output_height: outputHeight,
+          cover_url: coverUrl,
+          custom_title: props.titleSettings?.title || "",
+          duration: props.duration || undefined,
+          video_ratio: props.videoRatio,
+          voice_library_id: voiceLibraryId,
+          ...(props.selectedVoice && !voiceLibraryId ? { voice_ids: [props.selectedVoice] } : {}),
+          bgm_config: {
+            enabled: props.bgm !== false,
+            ...(props.bgmConfig?.music_id ? { preset_id: props.bgmConfig.music_id } : {}),
+          },
+          ...(props.sourceEditPlanId ? { source_edit_plan_id: props.sourceEditPlanId } : {}),
+          ...(props.titleSettings?.title
+            ? {
+                title_config: {
+                  text: props.titleSettings.title,
+                  font: props.titleSettings.font,
+                  font_size: props.titleSettings.size,
+                  font_color: props.titleSettings.color,
+                  position: props.titleSettings.position,
+                  bold: props.titleSettings.bold,
+                  stroke: props.titleSettings.stroke,
+                  shadow: props.titleSettings.shadow,
+                },
+              }
+            : {}),
+        })
+        hide()
+        const taskId = taskResp.items?.[0]?.id
 
-      if (!taskId) {
-        throw new Error("创建任务成功但未返回任务 ID，请稍后在任务列表查看")
+        if (!taskId) {
+          throw new Error("创建任务成功但未返回任务 ID，请稍后在任务列表查看")
+        }
+        startPolling(taskId)
+      } catch (err) {
+        hide()
+        throw err
       }
-      startPolling(taskId)
     } catch (err: unknown) {
       console.error("[handleGenerate] 生成失败:", err)
       setGenerating(false)
@@ -161,7 +143,7 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
       setGenerateError(finalMsg)
       message.error(finalMsg)
     }
-  }, [props, clearTimer, startPolling, selectedTemplate, waitForClipsCreated])
+  }, [props, clearTimer, startPolling, selectedTemplate])
 
   const retry = useCallback(() => {
     setGenerateError(null)

apps/web/src/pages/generate/hooks/useStep2Materials.ts

@@ -113,7 +113,7 @@ export function useStep2Materials({
       try {
         // 1. 清空旧片段
         await updateEditPlanClips(tid, [], controller.signal)
-        // 2. 调用后端 from-assets 接口创建片段（60s 超时，与后端 MediaKit 一致）
+        // 2. 调用后端 from-assets 接口创建片段（异步秒级返回，60s 超时仅为兜底）
         await createClipsFromAssets(tid, ids, "main", requiredClipsCount, {
           signal: controller.signal,
         })
@@ -131,7 +131,7 @@ export function useStep2Materials({
         const code = (err as { code?: string })?.code
         if (code === "ECONNABORTED" || /timeout/i.test((err as Error)?.message || "")) {
           console.warn("[useStep2Materials] 智能选片超时:", err)
-          message.error("智能选片超时，请重试")
+          message.error("智能选片失败，请重试")
           return
         }
         console.warn("[useStep2Materials] 写入 clips 失败:", err)