Refactor: Export test case inputs for debug page

tests/4_determinant/test.js

@@ -5,13 +5,16 @@ export default {
 // - You MUST use a dynamic import() to load the 'mathjs' library from a CDN.
 // - You MUST use the library's built-in 'det' function to perform the calculation.
 // - The function should return the determinant value.`,
+  getTestCases: () => {
+    const matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    return [matrix];
+  },
   runTest: async (calculateDeterminant) => {
     const assert = {
       strictEqual: (a, e, m) => { if (a !== e) throw new Error(m || `FAIL: ${a} !== ${e}`) },
     };
-    const matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
+    const [matrix] = globalThis.getTestCases ? globalThis.getTestCases() : this.getTestCases();
     const det = await calculateDeterminant(matrix);
     assert.strictEqual(det, 0, "Test Failed: Determinant should be 0.");
   }
 };
-