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* Dynamic blocks: read parameters and actions from AutoCAD files A dynamic block's evaluation graph (kept as foreign data since #528) is read into a typed model, `cadcraft_doc::dynblock`, without changing the kept data: parameters (linear with value sets, point, visibility states, lookup, base point; polar, XY, rotation, alignment and flip by geometry) and actions (stretch with its frame and moved vertices, lookup tables; move, scale, rotate, flip, array, polar stretch by kind), each with its graph id and the parameters it follows. - `blocks.dynamic {name}` returns the model as JSON (handles as hex); `blocks.list` marks dynamic blocks. - Counts and values come from the file: capped by the groups present, non-finite numbers and missing members skipped. - Tests: a synthetic DOOR block (visibility, linear list, stretch, lookup), its survival through a save, damaged data, and the engine commands. Co-Authored-By: Claude Opus 5.5 <[email protected]> * Dynamic block references: their values and custom properties A dynamic block reference's extension dictionary says which dynamic block it shows (AcDbBlockRepresentation ▸ AcDbRepData) and the values it was given (AppDataCache ▸ ACAD_ENHANCEDBLOCKDATA, one XRECORD per parameter graph id). `dynblock::reference` reads them; a reference to the dynamic block itself has the block's values. - `dynblock::custom_properties`: the Properties palette's Custom section, in parameter order, only parameters shown in Properties: visibility state, lookup value worked out from the lookup tables (their "no match" name, e.g. Custom, when the inputs match no row), distances and point positions in drawing units (block units × the reference's scale), with the choices of each (states, lookup values, a distance's list). - Properties: a dynamic block reference shows its dynamic block's name instead of its anonymous block's, and a read-only Custom section. - `blocks.reference {handle}` returns the definition, values and properties. - Tests: synthetic references (own values, an anonymous block scaled 2, a width no lookup row has), survival through a save, the engine command. Co-Authored-By: Claude Opus 5.5 <[email protected]> * DWG: dynamic block lookup parameters keep their name and lookup action AutoCAD writes a lookup parameter's subclass marker as AcDbBlockLookUpParameter; the DWG bridge reads AcDbBlockLookupParameter and matches it exactly, so the parameter's name (303) and lookup action (94) were lost in DWG files and AutoCAD's lookups stopped working (a visibility change no longer resized the block). The bridge DXF now uses its spelling. Found by driving AutoCAD on CADCraft's output. Co-Authored-By: Claude Opus 5.5 <[email protected]> --------- Co-authored-by: Cody Vogt <[email protected]> Co-authored-by: Claude Opus 5.5 <[email protected]> Co-authored-by: Brandon Thomas <[email protected]>