api.ui.dialog.replace() resets size to medium

Description

api.ui.dialog.setSize("large") and setSize("xlarge") do not survive the next replace().

Host replace() always writes size back to "medium" before swapping the stack. Plugins that size first, then replace, always get the medium width (60) instead of large (88) or xlarge (116).

@tarquinen/opencode-dcp does exactly that for /dcp: setSize("xlarge") then replace(). The xlarge request is discarded.

setSize should persist across replace(), or replace should take the size so callers do not have to win a race against the reset.

Related: #44755 (host Dialog pins tall panels at height / 4 instead of vertical center).

Plugins

@tarquinen/opencode-dcp (repro via /dcp). Any plugin that calls setSize then replace.

OpenCode version

1.18.22

Steps to reproduce

1. In a TUI plugin:

   api.ui.dialog.setSize("xlarge")
   api.ui.dialog.replace(() => /* any panel */)
   

2. Measure the panel width.
3. It is 60 (medium), not 116 (xlarge).

Screenshot and/or share link

Operating System

Linux

Terminal

Not terminal-specific. Confirmed in 1.18.22 replace(): it always setStore("size", "medium").