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
2026-09-09 15:09:31 +01:00
commit 176de6bc1f
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+  <text x="96" y="116" text-anchor="middle" font-family="DejaVu Sans, sans-serif" font-size="72" font-weight="700" fill="#ffffff">Hi</text>
+</svg>