Initial commit: AeroFetch — yt-dlp/YouTube downloader for Windows

Electron + React (Fluent UI) desktop frontend for yt-dlp:
- Download queue with live progress, concurrency cap, cancel/retry
- Format/quality picker via yt-dlp probe; audio extraction to MP3
- Settings + history persistence (electron-store / JSON)
- Clipboard link auto-detect; persisted light/dark theme
- NSIS + portable packaging (binaries bundled at build time, not in git)

UI: "Studio" sidebar layout with a toffee-brown theme (light + neutral dark).
Dropdowns use a native <select> and tooltips a CSS-only Hint, to avoid a
dev-machine GPU overlay flicker/blank issue.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/main/history.ts

@@ -0,0 +1,48 @@
+import { app } from 'electron'
+import { join } from 'path'
+import { readFileSync, writeFileSync, existsSync } from 'fs'
+import type { HistoryEntry } from '@shared/ipc'
+
+// Plain JSON in userData (portable build redirects userData next to the exe).
+// Kept simple per the build plan; can migrate to better-sqlite3 later.
+const MAX_ENTRIES = 500
+
+function historyFile(): string {
+  return join(app.getPath('userData'), 'history.json')
+}
+
+export function listHistory(): HistoryEntry[] {
+  try {
+    if (!existsSync(historyFile())) return []
+    const data = JSON.parse(readFileSync(historyFile(), 'utf8'))
+    return Array.isArray(data) ? (data as HistoryEntry[]) : []
+  } catch {
+    return []
+  }
+}
+
+function save(entries: HistoryEntry[]): void {
+  try {
+    writeFileSync(historyFile(), JSON.stringify(entries.slice(0, MAX_ENTRIES), null, 2))
+  } catch {
+    /* best-effort; a read-only data dir just means no persisted history */
+  }
+}
+
+export function addHistory(entry: HistoryEntry): HistoryEntry[] {
+  // De-dupe by id (a retry of the same item replaces its prior entry).
+  const entries = [entry, ...listHistory().filter((e) => e.id !== entry.id)]
+  save(entries)
+  return entries
+}
+
+export function removeHistory(id: string): HistoryEntry[] {
+  const entries = listHistory().filter((e) => e.id !== id)
+  save(entries)
+  return entries
+}
+
+export function clearHistory(): HistoryEntry[] {
+  save([])
+  return []
+}