Fix 32-bit bcrypt ELFCLASS64 error and enhance installation

- Enhanced install_32bit.sh with clean virtual environment creation
- Added --force-reinstall and --clear flags for proper isolation
- Improved download_32bit_libs.sh with explicit armv7l targeting
- Added troubleshoot_32bit.sh for diagnosing 32-bit issues
- Better architecture verification and error messages
- Comprehensive package testing after installation

Fixes ELFCLASS64 error on 32-bit systems by ensuring proper
architecture isolation and clean package installation.

install_32bit.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 # Dedicated Offline Installer for 32-bit Raspberry Pi OS (armv7l)
+# Ensures clean installation with proper architecture isolation
 
 set -e
 
@@ -12,6 +13,7 @@ ARCH=$(uname -m)
 echo "Architecture: $ARCH"
 if [ "$ARCH" != "armv7l" ]; then
     echo "ERROR: This script is for 32-bit Raspberry Pi OS (armv7l) only!"
+    echo "Current architecture: $ARCH"
     exit 1
 fi
 
@@ -19,6 +21,7 @@ fi
 LIBS_FOLDER="req_libraries_32bit"
 if [ ! -d "$LIBS_FOLDER" ]; then
     echo "ERROR: $LIBS_FOLDER not found!"
+    echo "Please download 32-bit libraries first."
     exit 1
 fi
 
@@ -26,18 +29,75 @@ echo "Library folder: $LIBS_FOLDER"
 WHEEL_COUNT=$(ls $LIBS_FOLDER/*.whl | wc -l)
 echo "Wheel files: $WHEEL_COUNT"
 
-# 3. Create .venv
-echo "Creating .venv..."
-python3 -m venv .venv
+# 3. Show key 32-bit packages
+echo ""
+echo "32-bit packages to install:"
+if ls $LIBS_FOLDER/bcrypt*.whl >/dev/null 2>&1; then
+    BCRYPT_FILE=$(basename $(ls $LIBS_FOLDER/bcrypt*.whl | head -1))
+    echo "  BCRYPT: $BCRYPT_FILE"
+fi
+echo ""
 
-# 4. Activate environment
+# 4. Clean existing virtual environment
+if [ -d ".venv" ]; then
+    echo "Removing existing .venv to ensure clean installation..."
+    rm -rf .venv
+fi
+
+# 5. Create fresh virtual environment
+echo "Creating fresh virtual environment..."
+python3 -m venv .venv --clear
+
+# 6. Activate environment
+echo "Activating virtual environment..."
 source .venv/bin/activate
 
-# 5. Upgrade pip
+# 7. Ensure we're using the virtual environment
+echo "Python location: $(which python)"
+echo "Pip location: $(which pip)"
+
+# 8. Upgrade pip
+echo "Upgrading pip..."
 pip install --upgrade pip
 
-# 6. Install packages offline
-pip install --no-index --no-deps --find-links $LIBS_FOLDER/ $LIBS_FOLDER/*.whl
+# 9. Install packages with forced 32-bit isolation
+echo ""
+echo "Installing 32-bit packages (completely isolated)..."
+pip install --no-index --no-deps --force-reinstall --find-links $LIBS_FOLDER/ $LIBS_FOLDER/*.whl
+
+# 10. Verify 32-bit installation
+echo ""
+echo "Verifying 32-bit installation..."
+python3 -c "
+import sys
+print(f'Python executable: {sys.executable}')
+print(f'Architecture: $(uname -m)')
+
+try:
+    import bcrypt
+    print('✅ bcrypt imported successfully')
+    # Test bcrypt functionality
+    password = b'test'
+    hashed = bcrypt.hashpw(password, bcrypt.gensalt())
+    if bcrypt.checkpw(password, hashed):
+        print('✅ bcrypt functionality test passed')
+    else:
+        print('❌ bcrypt functionality test failed')
+except Exception as e:
+    print(f'❌ bcrypt import/test failed: {e}')
+
+try:
+    import requests
+    print('✅ requests imported successfully')
+except Exception as e:
+    print(f'❌ requests failed: {e}')
+
+try:
+    import vlc
+    print('✅ python-vlc imported successfully')
+except Exception as e:
+    print(f'❌ python-vlc failed: {e}')
+"
 
 echo ""
 echo "✅ 32-bit installation completed!"