yumoqing ca51e168dc docs: add API documentation for all /v1 endpoints ...

- docs/API.md: comprehensive API docs covering:
  - POST /v1/chat/completions (text generation)
  - POST /v1/video/generations (video generation, new)
  - POST /v1/image/generations (image generation, new)
  - GET /v1/tasks (async task status)
  - GET /v1/models (list available models)
  - Authentication, balance check, and billing notes

2026-05-26 13:10:05 +08:00

..

API.md

docs: add API documentation for all /v1 endpoints

2026-05-26 13:10:05 +08:00