A BOM row with a file name and a matching drawing but a blank thickness
was reported "No DXF" and locked, so its thickness could not be entered
and the part was dropped: BomAnalyzer skips such items before looking
for a drawing, and the form only knew drawings the analyzer matched.
A row with a blank material read "Matched" but was silently left out
of every group.
Rows now resolve their drawing through a DrawingFileIndex shared with
BomAnalyzer (whose behavior and tests are unchanged), and a row's status
is computed from its values:
Ready | Needs material | Needs thickness | No drawing found | No file name
Rows with a drawing stay editable, and an edit updates the status cell.
Groups take only Ready rows (a zero, negative or non-finite thickness is
not Ready). The summary line counts ready rows and each problem.
Build_RowWithoutThickness_StillFindsItsDrawing failed at its DxfPath
assertion against the previous commit. Mutation reds: removing the
material check, accepting zero or non-finite thickness, skipping the
drawing for rows without thickness, and grouping without the status
each fail the Bom tests.
Project Memory: b8e3a978-2cfe-4fe7-b2a5-eb01c6c54679
