include pythonnet runtime DLLs in build process to prevent missing dependencies

nice_uploader.spec

@@ -1,16 +1,35 @@
 # -*- mode: python ; coding: utf-8 -*-
 
 import os
+import importlib.util
 from pathlib import Path
 
 here = Path(__file__).resolve().parent
 project_root = here
 
+# Prepare datas and binaries lists; include icon resources
+datas = [(str(project_root / 'icon'), 'icon'), (str(project_root / 'icon' / 'icon1.png'), 'icon')]
+binaries = []
+
+# Try to include pythonnet runtime DLLs so Python.Runtime.dll is available
+try:
+    spec_py = importlib.util.find_spec("pythonnet")
+    if spec_py and spec_py.submodule_search_locations:
+        pn_path = Path(spec_py.submodule_search_locations[0])
+        runtime_dir = pn_path / "runtime"
+        if runtime_dir.exists():
+            for f in runtime_dir.rglob("*.dll"):
+                # destination folder inside the frozen app
+                binaries.append((str(f), "pythonnet/runtime"))
+except Exception:
+    # best-effort; if we can't locate pythonnet at build time, user can add it manually
+    pass
+
 a = Analysis(
     ['nice.py'],
     pathex=[str(project_root)],
-    binaries=[],
-    datas=[(str(project_root / 'icon'), 'icon'), (str(project_root / 'icon' / 'icon1.png'), 'icon')],
+    binaries=binaries,
+    datas=datas,
     hiddenimports=['bs4', 'requests', 'nicegui', 'pynng'],
     hookspath=[],
     hooksconfig={},