Render color pickers in unclipped overlays

[Today20092]

What to build

Make every solid-color picker fully usable regardless of its surrounding card, column, or viewport position.

Acceptance criteria

• Band-color and encoded-signal color pickers render outside card clipping boundaries.
• The overlay flips or repositions when there is insufficient space below or beside its trigger.
• Picker content scrolls internally when the viewport cannot fit its full height.
• The complete saturation/brightness area, hue control, hex input, and searchable palette remain reachable.
• Escape restores the original color, outside click commits, and live preview behavior remains intact.
• The picker is usable at both desktop and narrow responsive widths.

Blocked by

None — can start immediately.