fix(setup): update qml_gui PyQt6 pins for x86_64 and aarch64 compatibility

README.md

@@ -95,6 +95,7 @@ python run_electrum gui -g qml
 sudo apt update
 sudo apt install -y python3-venv python3-pip build-essential python3-dev
 sudo apt install -y libffi-dev libssl-dev libsecp256k1-dev
+sudo apt install -y libpulse0  # required by QtMultimedia (QML GUI)
 ```
 
 **Setup with Virtual Environment:**
@@ -128,7 +129,7 @@ source env/bin/activate
 # Upgrade pip and install dependencies
 python3 -m pip install --upgrade pip
 pip install -r contrib/requirements/requirements.txt
-pip install cryptography>=2.6
+pip install "cryptography>=2.6"
 
 # Install PyQt6 (ARM64-compatible versions)
 pip install --only-binary PyQt6,PyQt6-Qt6 \

setup.py

@@ -45,7 +45,11 @@ extras_require = {
     'gui': ['pyqt6'],
     'crypto': ['cryptography>=2.6'],
     'tests': ['pycryptodomex>=3.7', 'cryptography>=2.6', 'pyaes>=0.1a1'],
-    'qml_gui': ['pyqt6<6.6', 'pyqt6-qt6<6.6']
+    'qml_gui': [
+        'pyqt6>=6.7.0,<6.8.0',
+        'pyqt6-qt6>=6.7.0,<6.8.0',
+        'pyqt6-sip==13.10.2',
+    ],
 }
 # 'full' extra that tries to grab everything an enduser would need (except for libsecp256k1...)
 extras_require['full'] = [pkg for sublist in