`Attrib` gains optional per-attribute properties (`props`), each overriding
the attribute definition's. DXF reading takes them from the ATTRIB's groups
8/6/62/420/370; writing gives each ATTRIB the properties it is drawn with.
The renderer prefers them over the definition's. -ATTEDIT's Layer and Color
options set them; ATTSYNC resets them to the definitions, as in AutoCAD.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
ATTEDIT / EATTEDIT typed at the command line ran the JSON form and failed
with "`handle` is required". It now asks "Select block reference:" and then
"Enter value for <TAG> <current>:" for each attribute (Enter keeps the
value); the answers are applied together as one undo step.
-ATTEDIT is a command of its own (Modify > Object > Attribute > Global):
one at a time (Value: Change/Replace, Next) or global string replacement,
over the attributes chosen by block name, tag and value specifications.
Session::start now prefers an id that keeps its leading dash, so -ATTEDIT
is not taken for ATTEDIT; dashed aliases (-INSERT...) resolve as before.
INSERT `attribs` and ATTEDIT `values` match attribute tags in any case and
report the keys no attribute has in `unknownTags`.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
