* docs: specify pricing vision model update
* docs: plan pricing vision model update
* docs: record pricing vision usage estimate
* test(pricing): cover vision model entitlement
* feat(pricing): add DeepSeek vision unlimited model
* fix(pricing): fit long vision model name in plan cards
* fix(pricing): widen usage chart label spacing
* feat(pricing): explain model entitlement activation
---------
Co-authored-by: zhanghuihua <zhanghuihua@zhanghuihuadeMacBook-Pro.local>