fix: 预览视频标题渲染全链路修复 — custom_title注入+ASR路径标题支持 #1399

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xiaoxia merged 2 commits from fix/preview-title-render into develop 2026-08-17 00:50:27 +08:00

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CI Bot 423ee5bb48 style: auto-format with black + isort + prettier [skip ci-format-check]
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CI Bot c8789670e9 fix: 预览视频标题渲染全链路修复 — custom_title注入+ASR路径标题支持
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修复3个断点导致预览视频不渲染用户自定义标题:

断点1(P0): generate_video() 未将 custom_title 传给 _render_video()
断点2(P0): _render_video() 没有接收 custom_title,也未注入 plan.config[title]
断点3(P1): generate_ass_from_timeline() ASR路径完全跳过标题渲染
次要: 前端 font_size/font_color 与后端 size/color 字段名不匹配

修改:
- generation.py: _render_video 增加 custom_title 参数,JSON解析+字段归一化后
  注入 virtual_plan.config[title]; generate_video 调用处传递 task_info[custom_title]
- subtitle_generator.py: generate_ass_from_timeline 增加 title_text/title_config/
  video_duration 参数,ASR字幕与标题共存于同一ASS文件
- unified_render_service.py: _maybe_generate_ass 的ASR路径传递标题参数
- 新增 test_preview_title_render.py (9个测试覆盖3个断点)
2026-08-17 00:29:57 +08:00