v1.64 — Stylesheet split, type/spacing scales, text-size support, pie chart labels, tablet and laptop layouts

• Text follows your phone's or browser's own text-size setting
• Pie charts print each larger slice's share beside it, and tapping a slice or its legend row highlights both and shows that category's amount in the middle
• On a laptop or a tablet held sideways, a bill opens beside the bill list
• On tablets and laptops, stats and graphs use the full width, with sections side by side
• Text sizes and spacing tidied onto one consistent scale
• The "Remove" links for members and guests use the warning colour, and the header's version number is small again

Merged in #64 on 2026-09-29.