* perf(mobile): load the terminal engine and the session dock only when needed
Opening a session parsed xterm (with its WebGL addon) and the wide-layout
dock's Source Control and Files panels, even for chat sessions on phones.
The page's terminal now imports its engine when the first terminal mounts,
and the dock lazy-loads its panels behind a frame that paints at once.
The page build anchors lazy modules that share boot code the way it already
anchors routes, so the new lazy chunks don't split the boot chunks.
* fix(mobile): show the terminal start error when replaying queued commands throws