Refactor: Implement SmartCube renderer, improve UI styling, and fix gaps

node_modules/@gkucmierz/utils/spec/pow-mod.spec.mjs

@@ -0,0 +1,21 @@
+
+import {
+  powMod,
+  powModBI,
+} from '../src/pow-mod.mjs';
+
+describe('pow-mod', () => {
+  it('powMod', () => {
+    expect(powMod(2, 1)).toEqual(2);
+    expect(powMod(2, 1, 10)).toEqual(2);
+    expect(powMod(2, 1, 2)).toEqual(0);
+    expect(powMod(2, 0, 2)).toEqual(1);
+  });
+
+  it('powModBI', () => {
+    expect(powModBI(2n, 1n)).toEqual(2n);
+    expect(powModBI(2n, 1n, 10n)).toEqual(2n);
+    expect(powModBI(2n, 1n, 2n)).toEqual(0n);
+    expect(powModBI(2n, 0n, 2n)).toEqual(1n);
+  });
+});