fix(webgpu): safely expose material uniforms and fix portal blur

[krispya]

Fixes WebGPU material constructor crashes caused by custom uniforms overriding Three.js properties. We introduce a withUniforms helper that block reserved property names on the base materials so there is conflict.

Note: This is still a workaround. If a user tries to copy or clone the material there will be issues.

Also fixes portal blur mask generation, asynchronous GPU readback, and resource cleanup.

[vercel]

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Project	Deployment	Actions	Updated
drei	Error		Sep 5, 2026 12:49am UTC

[github-actions]

📊 Package size report   No changes

File	Before (Size / Gzip)	After (Size / Gzip)
Total (Includes all files)	46.1 MB / 38.0 MB	46.1 MB / 38.0 MB
Tarball size	37.6 MB	37.6 MB

Hidden files

File	Before (Size / Gzip)	After (Size / Gzip)
.yarn/install-state.gz	1.5 MB / 1.5 MB	1.5 MB / 1.5 MB

_{🤖 This report was automatically generated by pkg-size-action}

[github-actions]

🎉 This PR is included in version 11.0.0-alpha.7 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

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