## Summary

Cloning the bar plugin (`omarchy plugin clone omarchy.bar`) produces a shell with **no bar on any screen**. The cloned bar is instantiated without its required properties, so it never mounts. This also affects an unmodified, pristine clone — no user edits are needed to reproduce — and it makes the documented alternative-bar flow (`omarchy bar use <id>`, e.g. the `local.neon-bar` example in the bar plugin README) unusable.

## Environment

- omarchy `4.0.0-1` (fresh upgrade to Quattro)
- hyprland `0.56.2-1`
- quickshell-git `0.3.0.r20.g28771c7-1`

## Steps to reproduce

1. `omarchy plugin clone omarchy.bar` (clones to `~/.config/omarchy/plugins/<user>.bar` and auto-switches the bar to the clone)
2. `omarchy restart shell`

## Expected

The cloned bar renders identically to `omarchy.bar` (it is a byte-for-byte copy with only the manifest id rewritten).

## Actual

No bar renders on any screen. The journal shows the clone being instantiated without the required properties the host normally injects:

```
WARN scene: file:///home/lvkz/.config/omarchy/plugins/lvkz.bar/Bar.qml[15:3]: Required property omarchyPath was not initialized
WARN scene: file:///home/lvkz/.config/omarchy/plugins/lvkz.bar/Bar.qml[17:3]: Required property barWidgetRegistry was not initialized
WARN scene: file:///home/lvkz/.config/omarchy/plugins/lvkz.bar/Bar.qml[22:3]: Required property barConfig was not initialized
WARN scene: @shell.qml[256:-1]: ReferenceError: errorString is not defined
```

The warnings appear once per screen (6 lines on a 2-monitor setup). Widget-kind clones (`omarchy plugin clone omarchy.workspaces`, `omarchy.weather`) mount fine on the same system, so this looks specific to the `bar` kind: the first-party mount path passes `omarchyPath` / `barWidgetRegistry` / `barConfig`, but the path used for user plugins apparently does not.

## Secondary issue

The last log line suggests the shell's plugin-load error handler references an undefined `errorString` (`shell.qml` line 256), so whatever diagnostic it meant to surface is lost.

## Recovery (works)

```
omarchy plugin remove <user>.bar --yes   # prints "Restored omarchy.bar."
omarchy restart shell
```

plus removing the leftover `"id": "<user>.bar"` key from `bar` in `~/.config/omarchy/shell.json` if present.

## Why I hit this

I was porting a pre-Quattro per-monitor Waybar setup (no bar on one specific monitor) and cloned the bar to add a screen filter — then found even the pristine clone doesn't mount.