The recovery overlay text was using the general HUD blue (#5577aa)
instead of the Matrix green palette required by the issue.
Updated to #22aa66 with matching text-shadow glow.
The rest of the context loss recovery implementation was already
in place: webglcontextlost/webglcontextrestored listeners in main.js
with event.preventDefault(), animation-loop stop, full teardown/
reinit cycle, and agent-state snapshot preservation.
Fixes#63
