TimePicker renders wider than inspector width

The TimePicker control can render around 240 px wide even when the inspector shows Width = 120.

Reproducing:

• Add a TimePicker to a window in Studio.
• Leave its inspector width at the default 120.
• Add a 240 px wide Button beside it for comparison.
• Observe that the TimePicker visually renders about the same width as the 240 px Button.

Expected:

The TimePicker should render at the width shown in the inspector.

Actual:

The TimePicker inspector/model width is 120, but Avalonia’s Fluent theme minimum width causes it to lay out at about 242 px. This also makes resizing feel wrong because the visual bounds do not match the stored designer width.