ZDS support for Back‑face color setting

[pierremtb]

Fixes #9096

TODO:

• Figure out how to send the new setting on change without a full reload, likely through the same mechanism as Add color opacity #9506
• See the tests we'd need for this

[vercel]

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Project	Deployment	Review	Updated (UTC)
modeling-app	Ready	Preview, Comment	Jan 26, 2026 10:09pm

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will degrade performance by 10.76%

_{Comparing pierremtb/issue9096-ZDS-support-for-Back‑face-color-setting (decc091) with main (6ca538d)¹}

Summary

❌ 1 regressed benchmark
✅ 152 untouched benchmarks
⏩ 93 skipped benchmarks²

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	mock_execute_mike_stress_test_program	343.2 ms	384.6 ms	-10.76%

Footnotes

1. No successful run was found on main (c3ed921) during the generation of this report, so 6ca538d was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 93 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩