Fix XYZ grid state leaks on invalid axis values

The always-on variant returned from its parse-error handler without
resetting the module-level active flag, silently disabling the XYZ grid
for every later generation until restart. The selectable variant
likewise returned without ending the job state it had begun.

https: //claude.ai/code/session_014QWKWgKvMevcuvfCnsYoT2
Co-Authored-By: Claude <noreply@anthropic.com>

scripts/xyz_grid.py

@@ -251,6 +251,7 @@ class XYZGridScript(scripts_manager.Script):
         except Exception as e:
             log.error(f"XYZ grid: invalid axis values {e}")
             errors.display(e, 'xyz')
+            shared.state.end(jobid)
             return None
 
         Image.MAX_IMAGE_PIXELS = None # disable check in Pillow and rely on check below to allow large custom image sizes

scripts/xyz_grid_on.py

@@ -267,6 +267,7 @@ class XYZGridScript(scripts_manager.Script):
         except Exception as e:
             log.error(f"XYZ grid: invalid axis values {e}")
             errors.display(e, 'xyz')
+            active = False
             return None
 
         Image.MAX_IMAGE_PIXELS = None # disable check in Pillow and rely on check below to allow large custom image sizes