LingYing Agent
79e6bd52b8
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修复5个问题：
1. 最终视频标题一致性
- 后端 drawtext 默认 font_size 从 36 改为 28（对齐前端 DEFAULT_TITLE_CONFIG.size）
- 后端 drawtext 默认 position 从 'top' 改为 'bottom'（对齐前端默认值）
- 前端 contract.ts font_size fallback 从 36 改为 28
2. 封面与视频一致性
- 渲染完成后自动用 output_cover_url 更新前端封面配置
- 前端封面标题预览 fontSize 改用 size*0.55 缩放（与对口型预览对齐）
- 封面默认阴影改为 none（与后端 drawtext 无 shadow 行为对齐）
3. B-roll 位置一致性
- ModalBRollEditor 使用 lipsyncJob.script_text（TTS 时锁定的文案）
而非 state.scriptText（用户可能已修改的文案）
4. B-roll 时长精确化
- 后端 lipsync_tts.py 新增 _compute_sentence_timings()：
TTS 音频用 ffmpeg silencedetect 检测静音点，与句子边界对齐
- 新增 sentence_timings JSON 字段到 LipsyncJobModel + Alembic migration
- 前端 sentences.ts 不再做字数比例估算，改为接收后端精确时间戳
- ModalBRollEditor 接收 sentenceTimings prop
5. 标题拖拽位置修复
- PanelLipsyncPreview 拖拽标题发送百分比坐标(0-100) + position:'custom'
- 后端 build_title_drawtext_filter 的 custom 位置改用 drawtext 表达式
x=(w-text_w)*{pct_x} y=(h-text_h)*{pct_y}（百分比，与视频尺寸解耦）
文件变更：
- apps/api/app/tasks/lipsync_tts.py: 句子时间戳计算
- apps/api/app/schemas/lipsync.py: sentence_timings 字段
- packages/adapters/sqlalchemy_impl/models.py: sentence_timings 列
- packages/domain/video_filter_builder.py: 百分比坐标 + 默认值对齐
- alembic/versions/075_add_sentence_timings.py: 数据库迁移
- apps/web/src/pages/ai-avatar/types.ts: SentenceTiming + RenderJob.output_cover_url
- apps/web/src/pages/ai-avatar/utils/sentences.ts: 移除字数估算
- apps/web/src/pages/ai-avatar/utils/contract.ts: font_size 默认值
- apps/web/src/pages/ai-avatar/components/PanelLipsyncPreview.tsx: 拖拽百分比
- apps/web/src/pages/ai-avatar/components/PanelCoverAndGenerate.tsx: 标题缩放
- apps/web/src/pages/ai-avatar/components/ModalBRollEditor.tsx: 后端时间戳
- apps/web/src/pages/ai-avatar/AiAvatarPage.tsx: 封面更新 + 传参
- tests/unit/test_video_filter_builder.py: 测试更新
xiaoxia-saas API
结构
app/core/：配置与基础能力app/api/：路由组织app/schemas/：请求响应模型app/dependencies.py：依赖注入入口main.py：FastAPI 启动入口
当前可用接口
GET /api/healthGET /api/projects?workspace_id=...POST /api/projects