### System details

- Omarchy: 4.0.4-1 (the same code is still on the default `quattro` branch)
- Machine: Dell XPS 13 (DX13260), Intel Core 5 320, Intel Graphics

### Description

`omarchy font set <font>` is meant to show "You must restart Foot/Ghostty to see font
change" when those terminals are running, but the notification never appears. Instead
the command prints `omarchy-notification-send`'s usage message.

In `bin/omarchy-font-set`, both calls pass `-g` without a glyph:

```bash
if pgrep -x ghostty; then
  omarchy-notification-send -g  "You must restart Ghostty to see font change"
fi

if pgrep -x foot; then
  omarchy-notification-send -g  "You must restart Foot to see font change"
fi
```

`-g` takes a value, so the message is consumed as the glyph and there's no headline left,
which makes `omarchy-notification-send` print its usage and exit. (It looks like the
glyph character between `-g` and the message was lost: note the double space.)

A smaller side effect in the same lines: `pgrep -x foot` / `pgrep -x ghostty` aren't
silenced, so the terminal's PID is printed to stdout during `omarchy font set`.

### Steps to reproduce

1. Have a foot (or ghostty) window open.
2. Run `omarchy font set "JetBrainsMono Nerd Font"` (any installed font).

**Expected:** a notification saying to restart Foot/Ghostty.
**Actual:** no notification; the output shows a PID followed by
`Usage: omarchy-notification-send [--app-name <app-name>] [-g <glyph>] ...`.
The font change itself still works.

### Suggested fix

Restore a glyph after `-g` (or drop `-g`), and silence `pgrep`:

```diff
-if pgrep -x ghostty; then
-  omarchy-notification-send -g  "You must restart Ghostty to see font change"
+if pgrep -x ghostty >/dev/null; then
+  omarchy-notification-send "You must restart Ghostty to see font change"
 fi

-if pgrep -x foot; then
-  omarchy-notification-send -g  "You must restart Foot to see font change"
+if pgrep -x foot >/dev/null; then
+  omarchy-notification-send "You must restart Foot to see font change"
 fi
```