web-player: dedupe queue, stop at end of queue, open queue once and harden localStorage

web-player/src/lib/utils/storage.ts

@@ -0,0 +1,15 @@
+export function readStorage(key: string, fallback: string | null = null): string | null {
+	try {
+		return localStorage.getItem(key) ?? fallback;
+	} catch {
+		return fallback;
+	}
+}
+
+export function writeStorage(key: string, value: string): void {
+	try {
+		localStorage.setItem(key, value);
+	} catch {
+		/* localStorage unavailable (private mode, quota) — the value just won't persist */
+	}
+}