8994d8e743
kipy's Board.remove_items discards the DeleteItemsResponse, and the proto warns the overall status may read OK even when nothing was deleted - a locked image comes back IDS_IMMUTABLE. remove_overlays went through the proto layer already for create; do the same for delete, so a locked overlay is reported instead of silently surviving while a second image is stacked on top of it. Slots that a narrower run does not write kept the previous solve's heatmap and read as current; clear them. The whole push is now one commit, so a single undo reverts it rather than one layer of it. _pad_polygons probed F.Cu before B.Cu regardless of which side the joint protrudes from, so a pad sized differently per copper layer had its solder coat measured from the wrong face; probe the solder side first. Pads on no single copper layer are now noted rather than silently skipped. _fail could report nothing at all: before the output directory exists no PNG is written, and with no GUI toolkit plots only opens saved PNGs - the broken-plugin-environment case the docstring promises to cover. Fall back to the temp dir, and never let reporting mask the fault. Frequency input now keeps its specific rejection reason, as the other numeric fields do.