feat: run.sh entry point and Tahoe manual checklist

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/manual-checklist.md

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+# Manual checklist — GUI-only steps on macOS 26 Tahoe
+
+Do these once, in order, after `scripts/run.sh` has completed. Tick and date.
+
+## Apply the shell-level changes
+- [ ] Log out / log in once (key repeat, press-and-hold, scroll direction only fully apply to a fresh session).
+
+## Cloud + privacy
+- [ ] System Settings > [your name] > iCloud > Drive (or "Saved to iCloud" > Drive): **Desktop & Documents Folders = OFF**. Keep account signed in.
+- [ ] System Settings > General > AirDrop & Handoff: Handoff OFF, AirDrop = Contacts Only.
+- [ ] System Settings > Screen Time: App & Website Activity OFF.
+- [ ] System Settings > Spotlight: untick Siri Suggestions and any web/store result types; "Help Apple Improve Search" OFF.
+- [ ] System Settings > Notifications: Allow notifications when mirroring/sharing OFF (keeps popups off a projector).
+
+## DAW Focus
+- [ ] System Settings > Focus > "+" > Custom > name **DAW**, icon of your choice. Allowed notifications: none. "Share across devices" OFF. Toggle it from the menu-bar moon before a session.
+
+## Apps needing a first-launch grant
+- [ ] Launch **Rectangle** once -> grant Accessibility when prompted. Set your snap keys.
+- [ ] Launch **kitty** once. Gatekeeper prompt -> Open.
+- [ ] Launch **Tailscale** -> log in to the tailnet. Confirm `tailscale status` in kitty and that `ssh mac` from bebop resolves via MagicDNS later.
+- [ ] Gitea: `cat ~/.ssh/id_ed25519.pub` -> https://git.sethpc.xyz/user/settings/keys -> Add Key. Then `git clone git@git.sethpc.xyz:Seth/mac.git` works from the Mac if you ever want to edit there.
+
+## Ableton
+- [ ] ableton.com > account > download Live 12 (Suite/trial) -> install to /Applications -> authorize.
+- [ ] Re-run `scripts/run.sh --no-tank` from steel141 so the Dock picks up Live (the script only adds it if installed).
+- [ ] Live > Browser > Packs: download the Suite packs you want (they're part of the license — do not torrent them).
+- [ ] Third-party packs: Finder > Go > Connect to Server > `smb://192.168.0.173/tank` (user seth, tick "Remember in Keychain") -> copy from `Downloads/Software/Milkie/` to `~/Music/Ableton/Samples/` (local disk — never run samples off SMB).
+- [ ] Live > Settings > Audio: once an interface is attached, pick it, 48 kHz, buffer 128 (raise if crackle). Test with the DAW Focus on and the lid open on AC for 15 min: no sleep, no notification.
+
+## Backup
+- [ ] `ssh mac ~/mac/scripts/backup.sh` by hand once -> confirm `/tank/backups/mac/Ableton` appears on pve173 and `~/Library/Logs/mac-backup.log` exists.