A test pins the terminal's aligned columns: `drawRows` lines up, drops and never shrinks below `min` #6752

src/tui/local/rows.ts exists so the third field sits under the third field above it on every local terminal screen; no test calls drawRows.

Done when a new test file draws onto a small in-memory surface (as the other tui tests do) and proves:

• [ ] three rows of uneven widths start each column at the same x, with two spaces between columns and none before the first.
• [ ] when the width is too narrow, columns go in their drop order and a column never draws narrower than its min.
• [ ] the selected row's emphasis column is bold and others are not.

Test only; a bug it finds is fixed in the same pull.