Make shuffle reorder and restore the play queue, add off/all/one repeat playback, and remove Resonant Radio UI.

Hop-State: A_06FNNZKG8MKNEJA6QXQ1ZER
Hop-Proposal: R_06FNNZJMKS1Z9RBS9ADD3ER
Hop-Task: T_06FNNXTJEGA5TEAZ2GA55X0
Hop-Attempt: AT_06FNNXTJEHPH9SQPGKC0P9G

src/lib/playback.ts

@@ -0,0 +1,18 @@
+export type RepeatMode = "off" | "all" | "one";
+
+export function nextRepeatMode(mode: RepeatMode): RepeatMode {
+  if (mode === "off") return "all";
+  if (mode === "all") return "one";
+  return "off";
+}
+
+export function shuffleTracks<T>(items: readonly T[], random: () => number = Math.random): T[] {
+  const shuffled = [...items];
+
+  for (let index = shuffled.length - 1; index > 0; index -= 1) {
+    const swapIndex = Math.floor(random() * (index + 1));
+    [shuffled[index], shuffled[swapIndex]] = [shuffled[swapIndex], shuffled[index]];
+  }
+
+  return shuffled;
+}