perf: use crypto.getRandomValues() for higher-quality shuffle in music player (#2181)

* fix: use crypto-safe randomness in shuffle helpers

src/renderer/utils/shuffle.ts

@@ -1,22 +1,22 @@
 export function shuffle<T>(array: T[]): T[] {
-    // Create a copy of the array to avoid mutating the original
-    const shuffled = [...array];
-
-    // Loop through the array from the last element to the first
-    for (let i = shuffled.length - 1; i > 0; i--) {
-        // Generate a random index from 0 to i
-        const j = Math.floor(Math.random() * (i + 1));
-        // Swap elements at positions i and j
-        [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
-    }
-
-    return shuffled;
+    return shuffleInPlace(array.slice());
 }
 
 export function shuffleInPlace<T>(array: T[]): T[] {
     for (let i = array.length - 1; i > 0; i--) {
-        const j = Math.floor(Math.random() * (i + 1));
+        const j = Math.floor(cryptoRandom() * (i + 1));
         [array[i], array[j]] = [array[j], array[i]];
     }
     return array;
 }
+
+const randomBuffer = new Uint32Array(1);
+
+/**
+ * Returns a cryptographically secure random float in [0, 1),
+ * matching the contract of Math.random().
+ */
+function cryptoRandom(): number {
+    crypto.getRandomValues(randomBuffer);
+    return randomBuffer[0] / 0x100000000;
+}