Calculator v1.6: round-screen keypad with arithmetic

- 19-key layout fitted to round display, centered focus, scrollable list
- full arithmetic: +-*/ %, decimals, +/- , AC, divide-by-zero, chained ops
- scroll-to-center focus with top/bottom spacers, high-contrast keys
- tests: arithmetic + geometry/contrast

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codex-bot

2026-09-09 15:09:31 +01:00

commit 176de6bc1f

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node_modules

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