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Closing the window no longer kills in-progress downloads, the library gains the same copied-link suggestion the downloads tab has, and the in-app updater can now authenticate to a sign-in-required Gitea. Background / tray: - The window's close handler now hides to the tray (instead of quitting) whenever a download is in flight, even if "Keep running in the tray" is off — quitting was killing the spawned yt-dlp processes. A one-time notification explains the app is still running. (download.ts exposes hasActiveDownloads().) - tray.ts now falls back to an embedded icon when no build/icon.ico ships, so the tray actually appears — previously an empty icon meant the tray was skipped and a minimized window could be stranded with no way back. - New "Start with Windows" setting (launchAtStartup) wired to app.setLoginItemSettings, synced at startup and on toggle. Useful with auto-download so watched channels stay current in the background. - The "Keep running in the tray" hint now explains it also enables background auto-download of new uploads. Library clipboard detection: - Extracted the downloads tab's clipboard watcher into a shared useClipboardLink hook and used it in the library's add-source field, so a copied channel/playlist link is offered there too. Updater fix (works on a private / sign-in-required instance): - Added an optional updateToken setting. When set, the updater sends it as a Gitea Authorization header on the release check, the checksum fetch, and the installer download — so "Check for updates" works where anonymous access is blocked (the previous "could not reach the update server" case). Blank = anonymous, unchanged. No token is ever shipped; it's only ever sent to the host-pinned update host. Settings gains a masked "Update access token" field. Typecheck clean; 187 tests pass; electron-vite build clean. New UI verified in the browser preview (tray/startup toggles, token field, library copied-link banner). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>