wonder 8a422528d5 fix: restructure xinfra slides section order and remove API/ER slides ...

- Remove API 设计规范 and 数据库 ER 设计（核心表）slides
- Fix TOC: remove deleted 数据库设计 entry
- Fix 对接子系统 section divider: add 三、 prefix
- Move 对接子系统 after all architecture diagrams to keep
  架构图 section完整连续（9 diagrams uninterrupted）

2026-07-16 10:20:06 +08:00

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slides.md

fix: restructure xinfra slides section order and remove API/ER slides

2026-07-16 10:20:06 +08:00