v2.5.7

• Weekly calibration - a mid-week plan or limit change (the weekly % drops while its reset time stays) now rebases the decimal's rate at once instead of mixing in the old plan's steps for days.
• Upstream sync: merged 9 commits (Spend Limit Usage and Spend Limit Amount widgets, Session Usage renamed to Block Usage, 8-bit color codes kept, bar text cursor, optional Claude Status link).