Merge pull request #7 from koraytaylan/copilot/split-vision-rays-into-vision-w-h

fix: replace magic 468 with FIXED_TAIL_SIZE, add checked arithmetic in BrainLayout

Merge origin/develop into copilot/split-vision-rays-into-vision-w-h

feat: split vision_rays into explicit vision_w and vision_h in BrainConfig

Merge pull request #3 from koraytaylan/feature/perf-optimization

Initial plan

fix: address PR review — clamp UI bounds, use config stride in headless, remove dead module

fix: use cached telemetry for HUD prediction error and exploration labels

fix: read prediction_error and exploration_rate via blocking telemetry

docs: update README, brain README, and EVOLUTION_JOURNEY for mega-kernel

fix: restore agent detail telemetry, vision_stride UI, history at all speeds

fix: one submit per mega-batch to prevent uniform write race

fix: remove diagnostic logging, fix mega shader subgroup markers

fix: remove diagnostic logging from main.rs

fix: update dispatch_batch docstring, remove dead binding