The preview was four flat lines of text on a plain field. After this cycle the
real log has a channel header above it, a fixed timestamp column, and system
messages in italics -- so the preview had quietly become a picture of a window
that no longer exists. That is the same defect as a widget with no call site,
just pointing the other way: something on screen that stopped tracking what it
describes.
The reserved band grew with it. It is a fixed height that the sidebar mock also
divides by, so adding a row inside without raising it would have pushed the last
message out of the space -- the recurring drawing-into-unreserved-space mistake
this project keeps stepping on.
Preview stamps are fixed rather than live. A clock ticking inside a settings
panel pulls the eye away from the setting being changed.