[LHagfoss]

What

The composer's Run on chip drew filled and bold at rest, so it looked pressed next to the folder chip, and its label ("Run on This computer") was the longest in the strip.

• The chip now rests like the folder chip: no fill, muted text, fill on hover and while the menu is open.
• The visible label is the machine's name only ("This Mac", "Studio"); aria-label ("Run on: ‹name›") and the tooltip keep the "Run on" wording.
• It takes the folder chip's width steps: 96px under @max-lg/composer, icon-only under @max-sm/composer.
• This computer is named with selfName() (This Mac / This PC) in the chip and the menu, instead of "This computer".
• The icon stays Monitor; the per-device icon from the device-settings issue does not exist yet.

Changelog

The composer's Run on chip is idle at rest and shows just the machine's name.

Testing

• bun run check in apps/desktop.
• Not checked in the mock window or with a screenshot: this run was told not to open a browser. Worth a look at ?machines=paired before release.

Closes #3444