## Summary

`omarchy toggle bar on` hides the bar, and `omarchy toggle bar off` shows it. The
`on` and `off` arguments are inverted.

`bin/omarchy-toggle-bar` forwards its argument straight to the `bar-off` flag:

```bash
omarchy-toggle bar-off "${1:-toggle}"
```

But the flag name and the user-facing argument name have opposite polarity. In
`shell/plugins/bar/Bar.qml` the flag is read as an inversion:

```qml
command: ["bash", "-c", "[[ -f $HOME/.local/state/omarchy/toggles/bar-off ]] && echo yes || echo no"]
stdout: SplitParser { onRead: function(line) { root.barHidden = String(line).trim() === "yes" } }
```

So the flag being *present* means the bar is *hidden*. Passing `on` to
`omarchy-toggle bar-off` creates the flag, which hides the bar.

## Steps to reproduce

1. Bar visible, `~/.local/state/omarchy/toggles/bar-off` absent.
2. Run `omarchy toggle bar on`.
3. The bar disappears, and `~/.local/state/omarchy/toggles/bar-off` now exists.
4. Run `omarchy toggle bar off`.
5. The bar reappears and the flag is removed.

The same inversion applies to a bare `omarchy toggle bar`, which just flips the
flag — it happens to work, which is probably why this has gone unnoticed.

## Expected

- `omarchy toggle bar on` → bar shown, no `bar-off` flag
- `omarchy toggle bar off` → bar hidden, `bar-off` flag present

## Suggested fix

Invert the action before handing it to the flag:

```bash
case "${1:-toggle}" in
  on) action=off ;;
  off) action=on ;;
  *) action="${1:-toggle}" ;;
esac

omarchy-toggle bar-off "$action"
```

## Impact

The failure mode is confusing rather than obvious. `hyprctl layers` still shows
the `omarchy-bar` layer, so the shell looks healthy, but the surface is parked
one bar-height past the screen edge:

```
$ hyprctl layers | grep omarchy-bar
Layer 5b5c98c33ad0: xywh: 0 768 1366 26, a: 1, namespace: omarchy-bar
```

`y=768` on a 768px-tall monitor means the bar is entirely off screen, and
nothing on the display indicates why. Diagnosing it requires knowing that the
bar has a park-off-screen hidden state and that `~/.local/state/omarchy/toggles/`
controls it.

I hit this when trying to restore a bar I had hidden with the same command
group, which is the most likely thing anyone does with it.

## System

- Omarchy: 4.0.4-1
- Kernel: 7.2.5-3-omarchy x86_64
- GPU: NVIDIA GeForce GTX 1050 Ti
- Reproducible on a single machine; no evidence it is hardware specific, since
  the inversion is entirely in argument handling