The drawing-card feature batch (icon/image/compare/graph/d2 cards, --stdin,
tool resolution) added widget + wiring code that dipped total coverage under
the 95% floor — surfaced by `make release` (push-check skips coverage). Cover
the gaps: ProblemsController.refresh, every SVG shape-type bbox + the style
vocabulary, _spawnD2 via a real /bin/cat, the icon-show bus path + error
branches, and quad/arc/close marker paths.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
graphTemplateHandler lowers a {nodes,edges} payload to SVG: a deterministic
circular layout of labelled <circle> nodes with <line> edges, self-contained
(own light backdrop + content colors, like a d2 card) and painted by the
shared renderer. Display-only (D-78); decoupled from the interactive graph
pane (T-323) since a static card only needs a layout->SVG. Honest error on
a duplicate id or an edge to an unknown node.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>