Fix window action overflow

[elithrar]

Window action groups could collapse their header grid track and paint outside the Window frame after the container-aware layout change.

• Preserve an intrinsic size for container-query action rows in shrink-to-fit contexts.
• Let Window action tracks shrink within narrow inline headers while retaining desktop max-content sizing.
• Check visible action controls, not only wrappers, across every rendered Window surface.
• Cover document and Window containment at desktop, tablet, and mobile widths.

The Gearset header now stays inline at wider widths, stacks on mobile, and keeps its open Preset menu inside the viewport.