fix: Step2素材选择后调用/clips/from-assets,修复片段数量不足+随机起始时间 #1515

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xiaoxia wants to merge 1 commits from fix/call-clips-from-assets into develop

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Author SHA1 Message Date
xiaoxia 3aac9fc530 fix: Step2素材选择后调用后端/clips/from-assets接口,支持required_clips_count
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问题:前端在本地构建clips(每素材1个片段,start_time=0),
未调用后端/clips/from-assets,导致:
- 模板要求4个片段但只选了3个素材时只生成3个片段
- 后端随机start_time和多片段逻辑从未被触发
- 片段时间段固定从0开始,不随机

修复:
1. createClipsFromAssets增加requiredClipsCount可选参数
2. useStep2Materials改为:先PUT /clips清空旧片段,
   再POST /clips/from-assets创建片段,传入required_clips_count=模板segments数
3. 删除已废弃的buildClipsFromAssets工具函数(无其他引用)

后端/clips/from-assets自动处理:
- 素材不够时同一素材切多个片段
- 随机start_time,不重复
- 保证片段数=required_clips_count
2026-08-27 00:24:12 +08:00