What's Changed

GUID Format Improvements (#1)

• CRC bytes (chars 5-8) are now zeroed when copying a GUID to clipboard, consistent with SDL community database requirements
• Added warning when a device is handled by an SDL built-in driver (GUID ending in 6800) — mappings for these devices can be modified locally but should not be submitted to community databases

Build Improvements

• macOS: skip system SDL2 when building universal binaries to avoid architecture mismatches
• macOS: support Qt discovery from Qt online installer (~/Qt/) in addition to Homebrew