Sessions with cursor near the top (e.g. a fresh tunnel/ssh session)
have content at rows 1-2 and rows 3-40 blank in a 40-row terminal.
The previous fix trimmed AFTER slice(-20), but slice(-20) of a 40-line
snapshot grabs the last 20 rows — all blank. Trimming after slice then
removed everything, leaving an empty <pre>.
Fix: trim trailing blank lines from the full snapshot first, then
slice the last N lines of what remains. This way a session with 2
content lines at the top is reduced to those 2 lines before slicing,
and both appear in the preview.
Fixes both buildTileHTML (grid tiles) and buildSidebarHTML (sidebar
cards). Tests updated to cover the 40-row terminal scenario.
Brian Krabach
1dcf1fc2f3
