feat(nodes): draft axis guides at the moving endpoint + 2d parity

[wass08]

What

While drafting a wall or fence segment (click start → move endpoint):

• 3D walls: the moving endpoint now shows a long guide line perpendicular to the draft segment, in addition to the existing X/Z axis cross at the start point. (A full cross at the endpoint was considered and rejected — it collides with the start cross whenever the segment is axis-aligned.)
• 3D fences: gains the same guides — fences previously had no axis guides at all.
• 2D floor plan: renders the equivalent guides in SVG — cross through the draft start, perpendicular line through the moving endpoint — fed by useFloorplanDraftPreview, for both wall and fence drafts.

How

• The guide pieces (axis cross, perpendicular end line, axis-angle arc + measurement label) are extracted from wall/tool.tsx into packages/nodes/src/shared/draft-axis-guides.tsx; DraftAxisGuideState gains endOrigin.
• fence/tool.tsx drops its duplicated DraftAngleArc/DraftMeasurementLabel copies in favor of the shared module and wires up the new axisGuide state.
• 2D guides render in FloorplanLinearDraftLayer (the leaf layer that already re-renders per move) as solid lines with stroke width budgeted via unitsPerPixel, matching the alignment-guide layer — dashed 2000 m lines were too expensive.

Verification

• check-types 9/9, @pascal-app/nodes tests 874 pass, biome clean.
• Manually verified in the editor: wall + fence drafts in 3D and in the 2D floor plan.

---

Note

Low Risk
Editor-only drafting visuals and a refactor of duplicated UI helpers; no persistence, auth, or core geometry commit paths changed.

Overview
Adds draft axis guides while drawing wall and fence segments: an axis cross at the start point and a perpendicular guide through the moving endpoint (no second full cross at the end, to avoid overlap on axis-aligned segments).

3D: Wall and fence tools share a new packages/nodes/src/shared/draft-axis-guides.tsx module (DraftAxisGuides, getNearestAxisAngleLabel, measurement/arc UI). DraftAxisGuideState now includes endOrigin so the end perpendicular line renders during drag. Fence tool wires up the same axisGuide flow it lacked before; duplicated local DraftAngleArc / DraftMeasurementLabel code is removed.

2D: The floor plan panel draws matching SVG guides for active wall and fence drafts from useFloorplanDraftPreview, using long solid lines and unitsPerPixel stroke width for performance.

^{Reviewed by Cursor Bugbot for commit 879bf6e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 879bf6e. Configure here.}

[cursor]

2D endpoint guide length mismatch

Medium Severity

The 2D draft axis guide draws its endpoint perpendicular line for segments as short as 1e-6 m. This is inconsistent with 3D DraftAxisGuides and wall previews, which require segments of at least 0.01 m, leading to a misleading 2D guide for very short drafts without a corresponding 3D visual.

 

^{Reviewed by Cursor Bugbot for commit 879bf6e. Configure here.}