Use cached transparent 2D and cube textures for unallocated optional samplers without bypassing invalid-resource, target, or framebuffer-feedback guards.
Require actual glyph draws in release smoke tests and keep shader compilation asynchronous in probe instrumentation.
Bound drawable, geometry, texture, image, map and radar work; validate WebGL submissions and retire GPU resources safely. Treat context loss as terminal without re-entering Wasm after worker termination.
Add explicit Route location consent and regression coverage, including software-WebGL release probes for six deployed demos.
