feat(generate): #1744 批量预览对接后端变体真实片段 + 智能匹配候选池×3 #1748

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auto-approve-bot merged 1 commits from feat/1744-batch-real-variant-clips into develop 2026-09-06 20:45:10 +08:00

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xiaoxia 4eb3b49520 feat(generate): #1744 批量预览对接后端变体真实片段 + 智能匹配候选池扩大×3
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- 新增 POST /generation/variant-plans 轻量选片端点客户端与 useBatchVariantPlans hook:
  批量 step4 素材就绪后拉取各变体真实 plan clips,Canvas 预览优先播放 serverClips,
  预览所见即成片;端点 404/400 静默降级本地 variantSeed 模拟,网络错误 toast 一次
- 正式生成批量提交时按勾选索引回传 variant_plan_ids,后端直接关联不重选
- useSmartMatch 候选池下限改为 max(片段数×3, ceil(总时长/15s), 片段数),
  DEFAULT_LIMIT 10→30,保证批量变体独立选片避让有足够素材
- N=1 单视频链路零回归(hook 仅 isBatch && step4 启用)
- 新增单测 15 例(候选池规则 6 + hook 降级/竞态/去重/bailout 9)
2026-09-06 20:20:12 +08:00