feat(linux): accelerate animations with Vulkan compute

[benvinegar]

Summary

• Accelerate Linux procedural backdrops and image entrance effects with hardware Vulkan compute, retaining CPU fallback.
• Cache GPU pipelines, buffers, and source pixels; warm entrance rendering on workers and report adapter diagnostics.
• Add GLSL shader validation, opt-in hardware parity/cache/throughput tests, and Linux troubleshooting and QA documentation.

Validation

• cargo fmt --check — passed.
• cargo clippy --all-targets --locked -- -D warnings — passed.
• cargo test --release --locked vulkan_ -- --include-ignored --nocapture — all 5 passed on AMD Radeon 8060S (RADV STRIX_HALO), including CPU parity and cache refresh checks.
• cargo test --locked — 156 passed, 21 ignored, 2 failed because the platform annotation font is unavailable (text_exports_preserve_glyph_overhangs and exported_text_uses_an_available_platform_font).
• macOS and manual desktop validation not run.

This PR description was generated by Pi using gpt-6.1-sol

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	wgpu@​28.0.0
	pollster@​0.4.0

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