ChatInputBox

Re-fit the composer whenever the screen relayouts.

A manual height pins the composer, so once it has been squeezed by a smaller terminal nothing about this box's own geometry changes when the terminal grows back -- it never receives another Resize. The screen's layout-refresh signal does still fire, so that is what restores the height the user asked for.

Request a manual composer height and render it.

The request is stored clamped only by the screen ceiling; the popup and content constraints are applied at render time so they stay reversible.

Re-fit a manual height after the draft's rendered height changes.

Expand to the manual-height ceiling, or drop a manual height.

Keys off whether a manual height is visible rather than merely stored. A request floored by the draft renders identically to automatic sizing, so collapsing it would leave the composer where it already is and the gesture would read as broken -- expanding is the only move that responds. That also covers the stray row of travel a press can emit before the second half of a double-click lands.

Fit a manual composer around the completion popup.

Fit a manual composer around the prompt search panel.

Re-fit a manual height after this box is resized.

Deliberately re-renders rather than re-requesting: the stored request survives, so shrinking the terminal and growing it back restores the height the user actually chose.