8d4f7a0002
Address review feedback from cross-vendor review (Flash + GPT-OSS): 1. Auto-detect now checks for headless Linux (no DISPLAY), WSL2 (/proc/version contains 'microsoft'), instead of all Linux. Desktop Linux with a compositor keeps the overlay. 2. Add _cua_driver_supports_no_overlay() that probes cua-driver --help to check if the flag is supported. Older drivers (< 0.6.x) reject unknown flags, so passing --no-overlay would crash the MCP spawn. 3. Update tests to cover headless vs desktop Linux, WSL2 detection, version probe, and the unsupported-driver fallback path.