Aurora SpotiRip desktop and web app

- Spotify playlist, library, album and artist browsing with in-app playback
- Song, playlist and album downloads via spotdl with YouTube and Bandcamp fallbacks
- Electron desktop app (castLabs Widevine) with a permanent sidebar layout
- Linux and Windows packaging scripts

helpers/libraryHistory.tsx

@@ -0,0 +1,38 @@
+export type LibraryHistoryEntry = {
+  id: string;
+  timestamp: number;
+  kind: "playlist" | "identify" | "convert";
+  title: string;
+  trackCount?: number;
+  artworkUrl?: string;
+  sourceUrl?: string;
+};
+
+const KEY = "aurora-spotirip-history-v1";
+
+export function loadLibraryHistory(): LibraryHistoryEntry[] {
+  if (typeof window === "undefined") return [];
+  try {
+    const parsed = JSON.parse(window.localStorage.getItem(KEY) || "[]");
+    return Array.isArray(parsed) ? parsed : [];
+  } catch {
+    return [];
+  }
+}
+
+export function addLibraryHistory(entry: Omit<LibraryHistoryEntry, "id" | "timestamp">) {
+  const current = loadLibraryHistory();
+  const next: LibraryHistoryEntry[] = [
+    {
+      ...entry,
+      id: crypto.randomUUID(),
+      timestamp: Date.now(),
+    },
+    ...current,
+  ].slice(0, 200);
+  window.localStorage.setItem(KEY, JSON.stringify(next));
+}
+
+export function clearLibraryHistory() {
+  window.localStorage.removeItem(KEY);
+}