Replace raw text dump with proper boxed feature-control frame:
- parse_gdt_rows(): splits %%v cells and ^J row separators
- substitute_gdt_codes(): strips {\Fgdt;X} patterns, maps symbol chars
to 3-letter ASCII labels (POS, PRP, PAR, SYM, CIR, CYL, …)
- tessellate_tolerance(): outer rectangle, row separators, column
dividers, and CXF-tessellated cell text — all as Vec<Vec<[f32;2]>>
(TruckObject::Text polyline path)
- Column widths computed per cell content; text centred in each cell
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- mline.rs: MLine renders center spine + two parallel offset lines at
±scale/2 using the vertex miter directions; vertex grips; scale,
closed and style-name properties
- tolerance.rs: Tolerance renders the GDT text string via font
tessellation at insertion_point with rotation from direction vector;
insertion grip and position properties
- properties.rs: Dimension entity's style_name EditText is upgraded to
a Choice dropdown when document.dim_styles is non-empty, enabling
point-and-click DimStyle assignment without a separate panel
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
