v1.7.5: fix avvio Windows ("Failed to resolve Python.Runtime.Loader")

PyInstaller non bundlava i file di supporto di pythonnet/clr_loader
(Python.Runtime.dll, nethost.dll, runtimeconfig.json), per cui al
caricamento di webview.platforms.winforms.py l'import 'clr' moriva.

Aggiunti --collect-all pythonnet/clr_loader + copy-metadata.
Pinnata pythonnet a 3.0.3 (l'ultima compatibile con PyInstaller
senza patch aggiuntive).

build_windows.py

@@ -115,11 +115,20 @@ def run_pyinstaller():
         # Hidden imports per pywebview (EdgeChromium su Windows)
         "--hidden-import", "webview",
         "--hidden-import", "webview.platforms.edgechromium",
+        "--hidden-import", "webview.platforms.winforms",
         "--hidden-import", "clr",
+        "--hidden-import", "clr_loader",
         "--hidden-import", "requests",
-        # Collegamenti completi alle DLL .NET di pywebview/pythonnet
+        # Collegamenti completi: webview, pythonnet, clr_loader (porta
+        # con se Python.Runtime.dll + nethost.dll + runtimeconfig.json
+        # altrimenti winforms.py fallisce con "Failed to resolve
+        # Python.Runtime.Loader.Initialize ...")
         "--collect-all", "webview",
+        "--collect-all", "pythonnet",
+        "--collect-all", "clr_loader",
         "--collect-all", "mutagen",
+        "--copy-metadata", "pythonnet",
+        "--copy-metadata", "clr_loader",
         # Binari bundled
         *add_binaries,
         # Entry point

core/config.py

@@ -5,7 +5,7 @@ import os
 import sys
 from pathlib import Path
 
-VERSION = "v1.7.4"
+VERSION = "v1.7.5"
 
 
 APP_NAME = "MusicTools"

requirements.txt

@@ -5,4 +5,4 @@ mutagen>=1.47.0
 pyobjc-core>=10.0 ; sys_platform == "darwin"
 pyobjc-framework-Cocoa>=10.0 ; sys_platform == "darwin"
 pyobjc-framework-WebKit>=10.0 ; sys_platform == "darwin"
-pythonnet>=3.0 ; sys_platform == "win32"
+pythonnet==3.0.3 ; sys_platform == "win32"