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* fix(engine): WBLOCK writes only what the block or selection uses (#2423) WBLOCK of a block, or of selected objects, copied the source drawing's whole layer, linetype, style and block tables into the new file, so a 5-object symbol carried 40 unused layers and 20 blocks. The written drawing is now purged of what nothing in it uses, as AutoCAD's WBLOCK writes it: purge::purge_unused runs PURGE All's scan on a plain Drawing until a pass removes nothing (a block can free its layer), keeping the defaults and the current ones. Writing the entire drawing is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(engine): PURGE's scan counts leaders' dimension styles and styles used by other styles From the review of #2621: PURGE (and now WBLOCK, which runs its scan) took as unused a dimension style only a LEADER used, a linetype only a dimension style or a dimension's override named (DIMLTYPE, DIMLTEX1, DIMLTEX2), and a text style only a complex linetype's text used, and removed them while the objects still named them. The scan counts all three now; text_styles_in_use, which STYLE's delete also asks, includes complex linetypes' text styles. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(engine): PURGE's scan counts multiline styles' linetypes and table styles' text styles From the review of #2621: a linetype only a multiline style's element used, and a text style only a table style's cell style used, were taken as unused and purged while the styles still named them. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: austin62jake <340374338+austin62jake@users.noreply.github.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>