test(producer): regenerate 6 stale regression baselines in Docker

Renderer fixes (revert flattenInnerRoot, late-bind polling removal,
conditional rebind, sub-comp timeline readiness polling) changed visual
output but baselines were never regenerated. CI's Detect changes job
was skipping shards on non-engine commits, masking the failures.

Regenerated in Docker (Dockerfile.test) with pinned Chrome 148.0.7778.167:
- style-7-prod (60/100 frames failed, baseline from PR #368)
- style-15-prod (59/100 frames failed)
- style-18-prod (19/100 frames failed)
- style-3-prod (7/100 frames failed)
- style-8-prod (1/100 frames failed, borderline)
- typegpu-adapter (76/100 frames failed)

All 6 now pass locally with 0 failed frames.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/producer/tests/style-15-prod/output/output.mp4

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+size 22401485

packages/producer/tests/style-18-prod/output/output.mp4

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+size 15203934

packages/producer/tests/style-3-prod/output/output.mp4

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packages/producer/tests/style-7-prod/output/output.mp4

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packages/producer/tests/style-8-prod/output/output.mp4

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+size 14507933

packages/producer/tests/typegpu-adapter/output/output.mp4

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-size 159786
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