Merge branch 'worktree-g1-area-sampling-fix'

fix(area-sampling): literal port of C++ InterpolateImageAreaSampled

docs: add G1 area sampling fix implementation plan

docs: add G1 area sampling fix spec

docs: add golden failure classification catalog

docs: add golden failure classification implementation plan

docs: add golden failure classification spec

docs: add zero-tolerance golden parity failure report

fix(gradient): restore C++ hash formula ((x*257+0x8073)>>16) for gradient blending

docs: add zero-tolerance golden parity implementation plan

test(golden): drop all tolerances to zero, add zero-tolerance parity spec

test(golden): add control panel layout regression test for emMainControlPanel::LayoutChildren

test(golden): add cosmos item border golden test for emVirtualCosmosItemPanel::Paint

test(golden): add main panel layout golden tests for emMainPanel::UpdateCoordinates

test(golden): add starfield golden tests for emStarFieldPanel::Paint