Makes the canvas foundation (parser/renderer/view) reachable. The
extension owns an app-scoped MultitabController (the diff/T-233
pattern) so open documents survive the pane being rebuilt; each
document is a real sub-tab per the refinement decision, kept alive
across switches. Routing goes through the existing seams instead of
the dead TabContribution.fileGlobs field: openWorkspaceFile gains a
.canvas branch mirroring .md, and ui.open gains a canvas reader for
D-6 parity (clide ui open canvas <path>). Also corrects the
json_canvas doc header that claimed SVG-lowering — the interactive
pane paints the model directly (D-103 live-widget exception).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Adds hitTestCanvasNode (topmost node under a point, cards over the group
frames behind them, via the same viewport the painter draws with) and the
CanvasView widget: scroll-zoom, drag-pan, and click-to-select with a focus
ring. Node drag/resize and edit affordances follow.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Paints a CanvasDoc — group frames behind, edges with arrowheads, then
node cards (text / file / link) — fitted by a shared pan/zoom CanvasViewport
so a later hit-test lands on what's drawn. Node colours come from the file
(Obsidian presets 1..6 or hex), not clide tokens, since a .canvas is
arbitrary content; only the chrome is themed. Read-only for now; selection,
drag, and edit affordances follow.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Fable 5