Render chest overlays flush with the chest surface

[rubensworks]

Overlays (the functional wall icons shown while sneaking, the core marker, Display wall panels) floated a fixed 1/32 block in front of the chest, which was visible as a gap from an angle.

Changes

• The overlay offset now scales with camera distance (1/2048 per block, at least 1/1024), like vanilla's view offset layering. Up close it is about 1/1000 of a block, so overlays look flush; at 64 blocks it equals the old 1/32, so there is no z-fighting at range.
• The Display wall's internal layers (frame, panel, item, text, fill bar) were a fixed 0.0005 apart and z-fought at range: the wood frame bled through the panel at 64+ blocks, also before this change. They now use half the distance-scaled offset.
• Dropped the Display panel's sides (renderSides), since there is no gap left to cover. The public helper stays for addons.
• RenderChestCore.applyFaceTransform takes the offset as a parameter; OVERLAY_OFFSET is replaced by getOverlayOffset.

Testing

• ./gradlew build and runGameTestServer pass (NeoForge, Forge, Fabric).
• New unit test for the offset; transform tests updated.
• Checked in a NeoForge dev client with clientdevbridge while sneaking, at 3, 16, 32, 64 and 96 blocks and at grazing angles: overlays are flush and there is no z-fighting. A fixed 1/1024 offset was tried first, and z-fought from 16 blocks on, hence the distance scaling.

🤖 Generated with Claude Code

https://claude.ai/code/session_01RSz5r6eowhjNuANBjZE2v6

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Generated by Claude Code

[coveralls]

Coverage Report for CI Build 38113801969

Warning

Build has drifted: This PR's base is out of sync with its target branch, so coverage data may include unrelated changes.
Quick fix: rebase this PR. Learn more →

Coverage decreased (-0.005%) to 76.527%

Details

• Coverage decreased (-0.005%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 30 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

30 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
org/cyclops/colossalchests2/client/render/RenderChestCore.java	22	28.81%
org/cyclops/colossalchests2/client/render/DisplayWallOverlay.java	8	0.0%

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Coverage Stats

Relevant Lines:	6894
Covered Lines:	5578
Line Coverage:	80.91%
Relevant Branches:	2849
Covered Branches:	1878
Branch Coverage:	65.92%
Branches in Coverage %:	Yes
Coverage Strength:	9.89 hits per line

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💛 - Coveralls