fix(core): core stability (plugin duplicate ids, WebGPU disposal, error surfacing)

[ovurrsl]

fix(editor): stop mid-drag GPU disposal in the drag box and surface guide-image errors

Description

What does this PR do?

Two stability fixes in the editor:

1. DragBoundingBox no longer creates and disposes GPU resources every frame. It previously rebuilt its BoxGeometry/PlaneGeometry on every size change and disposed the old ones in an effect cleanup. During a resize drag that happens once per frame, and WebGPU can still be executing a command buffer that references the destroyed buffers, so it drops the whole frame ("Vertex buffer slot … was not set"). The box now uses module-level unit geometry scaled through the mesh transform, plus materials cached by colour.
2. Guide-image upload errors show the reason. Both guide-image upload paths (action-menu upload button and site panel) used a bare catch {}. They now log the error and show Could not add that guide image: <reason>, built by one shared guideImageErrorMessage helper in lib/local-guide-image.ts.

The earlier description also mentioned a plugin duplicate-id change and an insecure-context (crypto.randomUUID) fix. Both are out of this PR: the first only affects third-party plugin kinds, and upstream asset ids already come from nanoid.

The branch is merged with the current main.

How to test

1. bun test packages/editor/src/lib/local-guide-image.test.ts.
2. bun dev on a WebGPU browser: resize-drag an item or a cabinet with the bounding box showing. No frames blank out, and the box follows the size live.
3. Make a guide-image upload fail (for example by blocking IndexedDB / storage). The error message now includes the reason.

Screenshots / screen recording

Checklist

• I've tested this locally with bun dev
• My code follows the existing code style (run bun check to verify)
• I've updated relevant documentation (if applicable) (none needed)
• This PR targets the main branch

Replies to bot review threads

• Cursor Bugbot — shared module-level geometry/material disposed on unmount (needs dispose={null}): Checked against the versions in use; it does not occur. In @react-three/fiber 9.6.1, unmounting calls dispose() on the removed object only, and three 0.186's Object3D.dispose() only fires its dispose event, which lets the WebGPU renderer drop the per-object RenderObject. The shared UNIT_EDGES/UNIT_PLANE geometry and the cached materials are never disposed. dispose={null} would also skip that per-object cleanup, so it is left out.
• pascal Bot / any thread that says the described plugin duplicate-id fix is missing: That change was taken out of this PR; it only affects third-party plugin kinds whose id prefix contains an underscore, which Pascal's own nodes never have. Title and description are updated.
• Any thread on the stale "secure-context TypeError" comment: Removed.
• Any thread on the duplicated error formatting in the two catch blocks: Moved into guideImageErrorMessage in lib/local-guide-image.ts, with a test.

[pascal]

Summary

Three stability fixes in the editor package, all in packages/editor/src/components. The biggest one is in DragBoundingBox: it used to build a fresh BoxGeometry/PlaneGeometry and new materials whenever the dragged dimensions or colour changed, and dispose the previous ones in an effect cleanup. That is once per frame during a resize drag, so WebGPU could still be executing a command buffer pointing at buffers that had just been freed. The new version creates one unit edge geometry and one unit ground plane at module scope, caches materials in a Map keyed by colour, and moves the per-frame change into the mesh transform via position and scale. The other two changes are the same small fix applied in two places: the guide-image upload catch blocks in LevelReferences and UploadButton discarded the caught error, so a secure-context failure showed up as a generic "Could not add that guide image." They now log the error and append its message to the toast when there is one.

File	Change	What changed
packages/editor/src/components/tools/shared/drag-bounding-box.tsx	modified	Shared module-level unit geometry and cached materials replace per-frame geometry/material creation and disposal; sizing moves to scale, plane offset moves from baked translate to position
packages/editor/src/components/ui/action-menu/view-toggles.tsx	modified	Guide-image upload catch keeps the error: logs it and includes error.message in the toast
packages/editor/src/components/ui/sidebar/panels/site-panel/index.tsx	modified	Same error surfacing in LevelReferences, through useUploadStore.setError

One thing worth knowing while you read: the PR description lists an extractIdPrefix / plugin duplicate-id fix as item 1, but no such change appears in these three files.

Best place to start is drag-bounding-box.tsx, specifically whether the unit geometry plus scale reproduces the old dimensions exactly (the plane previously baked cx/groundY/cz into the geometry, and now gets them from position), and whether the never-disposed module-level geometry and material cache are the lifetime you want.