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73cbb0387c
The Web UI re-parses drawing SVG into its own element model instead of rendering it raw, which makes hand-assembled SVG error-prone for LLM callers. The new tool assembles the SVG server-side, mirroring what the Web UI itself serializes for text drawings: - XML-escaped text content, validated color (#RGB/#RGBA/#RRGGBB/ #RRGGBBAA) and font family (attribute-safe charset) - multi-line support: literal newlines render as stacked lines in the Web UI (tspan split), width/height computed from the longest line - pt-aware sizing: the Web UI renders font-size in pt (1pt = 4/3 px), so width uses a 0.8/char factor for monospace (1.0 proportional) and line height 1.9 x font_size, instead of the px-based 0.62 estimate - ET.fromstring pre-check so bad input fails loudly instead of hitting the controller's silent drop of unparseable 500+ char SVG - computed width/height/line_height returned for label layout Also correct the raw drawing_create docstring: root width/height are required (the parser reads them for the selection box), x/y on rect are ignored, <g> is unsupported, <path> is re-interpreted as a freehand curve, and the old examples lacked the mandatory root dimensions.