Server/new-api

作者	SHA1 备注	提交日期
Seefs	f424f906d8 feat: sync upstream pricing from pricing endpoint (#4452)	2 周之前
CaIon	f2f3410dcf feat: add `len` variable for tier conditions and LLM prompt helper	2 周之前
CaIon	c5405b2a12 feat: add billing expression system documentation and enhance tiered billing logic	1 月之前
CaIon	91ed4e196a feat: implement tiered billing expression evaluation and related functionality	1 月之前