## What happened

Updating 4.0.0-1 → 4.0.1-1, the post-update hooks failed:

```
--exec takes the command as separate words, not one quoted string.
Write:  --exec omarchy-launch-floating-terminal-with-presentation omarchy-voxtype-install
Hook failed: /home/<user>/.config/omarchy/hooks/post-update.d/install-voxtype.hook
```

The failing hooks were not written by me — they are the first-run invitation hooks Omarchy 4.0.0 itself installed into `~/.config/omarchy/hooks/post-update.d/` (`install-voxtype.hook`, `setup-agent.hook`, `setup-fingerprint.hook`), which at the time used the then-valid quoted form:

```bash
--exec "omarchy-launch-floating-terminal-with-presentation omarchy-voxtype-install"
```

4.0.1 tightened `omarchy-notification-send` to require `--exec <program> [args...]` as separate argv words and updated its own templates in `/usr/share/omarchy/install/user/first-run/` to the new form — but the copies already installed in users' `~/.config` were left behind, so they now fail on every post-update run. Presumably every 4.0.0 install that hasn't seen these invitations yet hits this.

## What I expected

A migration that rewrites the previously shipped hook contents to the new `--exec` form (the same update was already running other migrations), or `omarchy-notification-send` accepting the legacy single-string form with a deprecation warning for one release.

## Related detail worth fixing at the same time

The invitation hooks call `omarchy-done ensure <marker>` *before* sending the notification. `ensure` creates the marker as its check, so when `omarchy-notification-send` then fails, the one-shot marker is already burned — the invitation is lost forever even after the hook is fixed. (In my case `voxtype-install-invitation` was marked done by the failed run; I had to delete the marker manually to ever see the invite.) Marking done only after the notification succeeds would make these hooks failure-safe.

## Reproduction

1. Install Omarchy 4.0.0 (first-run installs the invitation hooks into `~/.config/omarchy/hooks/post-update.d/` with the quoted `--exec` form).
2. `omarchy update` to 4.0.1.
3. Post-update hook run fails as above; the touched `omarchy-done` markers are burned.

## System

- Omarchy 4.0.0-1 → 4.0.1-1, hyprland 0.56.2-1
- CPU: Intel Core i7-14650HX; GPU: Intel Raptor Lake-S UHD + NVIDIA RTX 4080 Max-Q (hybrid)