@mytec: iter2.3 multithreading p1 done

backend/run_server.py

@@ -1,6 +1,11 @@
 """Entry point for PyInstaller bundle"""
 import os
 import sys
+import multiprocessing
+
+# Required for ProcessPoolExecutor to work in PyInstaller frozen exe on Windows.
+# Must be called before any other multiprocessing usage.
+multiprocessing.freeze_support()
 
 # Force unbuffered stdout/stderr — critical for piped output (Electron, bat files)
 os.environ['PYTHONUNBUFFERED'] = '1'