Extend screenshot tests with web backend coverage#3

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zzuegg wants to merge 16 commits into

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claude/extend-screenshot-tests-aQMNs

Commits on Apr 6, 2026

refactor: split screenshot tests into scenes/desktop/web submodules
claude
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fix: match working TeaVM SLF4J exclusion pattern, add stacktrace to CI
claude
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fix: split CI into granular steps for TeaVM build debugging
claude
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fix: capture compile log and echo on failure for debugging
claude
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fix: post build error to PR comment for visibility
claude
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feat: complete web backend screenshot testing pipeline

zzuegg
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claude
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feat: include web (webgpu-browser) screenshots in HTML report

zzuegg
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claude
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feat: implement queueWriteTexture for TeaVM WebGPU, all 30 tests pass

zzuegg
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claude
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feat: add standalone HTML report generator for web screenshot tests

zzuegg
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claude
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fix: rename screenshot submodules to avoid Gradle project name collision

zzuegg
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claude
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fix: create report output directory if it doesn't exist

zzuegg
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claude
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fix: use Page.captureScreenshot instead of canvas pixel readback

zzuegg
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claude
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fix: SceneDiscovery now scans JARs on classpath, not just directories

zzuegg
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claude
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fix: full-frame screenshot capture via viewport override

zzuegg
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claude
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feat: load debug UI shader via AssetManager, add browser vs native cross-check

zzuegg
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claude
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fix: proper screenshot capture with viewport override before page load

zzuegg
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claude
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