Screenshot Copying Build Check

What: Screenshot copying now verifies build capabilities before attempting to generate screenshots, providing a clearer error message when the feature is unavailable.

Details:

• In builds without embedded font files (non-Bun builds or Bun builds without embedded assets), users will now see: "Screenshot copying is not available in this build"
• Previously, the feature would attempt to run and potentially fail with a less helpful error message
• The core screenshot functionality remains unchanged for supported builds
• Evidence: New guard clause in Ib2() at lines 483446-483450 in v2.0.64, calling e5() build check function at lines 17067-17074