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.

download_32bit_libs.sh

@@ -1,15 +1,71 @@
 #!/bin/bash
-# Download 32-bit ARM compatible libraries
+# Download 32-bit ARM compatible libraries with forced architecture
 
 set -e
 
-echo "Downloading 32-bit ARM compatible packages..."
+echo "======================================="
+echo "  32-BIT ARM LIBRARY DOWNLOADER"
+echo "======================================="
+echo ""
 
-# Create directory for 32-bit wheels
+# Remove existing 32-bit folder to ensure clean download
+if [ -d "req_libraries_32bit" ]; then
+    echo "🗑️  Removing existing req_libraries_32bit for clean download..."
+    rm -rf req_libraries_32bit
+fi
+
+# Create fresh directory
 mkdir -p req_libraries_32bit
 
-# Download with broader compatibility
-pip download -r requirements.txt -d req_libraries_32bit/ --prefer-binary
+echo "📦 Downloading 32-bit ARM compatible packages..."
+echo "   Target architecture: linux_armv7l"
+echo ""
 
-echo "Download completed!"
-echo "Files downloaded to req_libraries_32bit/"
+# Download with explicit 32-bit ARM platform targeting
+echo "🔄 Downloading with forced 32-bit architecture..."
+pip download -r requirements.txt -d req_libraries_32bit/ \
+    --platform linux_armv7l \
+    --only-binary=:all: \
+    --python-version 311 \
+    --abi cp311
+
+echo ""
+echo "📊 Download results:"
+WHEEL_COUNT=$(ls req_libraries_32bit/*.whl 2>/dev/null | wc -l || echo "0")
+echo "   Wheel files: $WHEEL_COUNT"
+
+if [ "$WHEEL_COUNT" -gt 0 ]; then
+    echo ""
+    echo "🔍 Key 32-bit packages:"
+    if ls req_libraries_32bit/bcrypt*.whl >/dev/null 2>&1; then
+        BCRYPT_FILE=$(basename $(ls req_libraries_32bit/bcrypt*.whl | head -1))
+        echo "   🔐 BCRYPT: $BCRYPT_FILE"
+        if [[ "$BCRYPT_FILE" == *"armv7l"* ]]; then
+            echo "      ✅ Correct 32-bit architecture"
+        else
+            echo "      ⚠️  Architecture unclear"
+        fi
+    fi
+    
+    if ls req_libraries_32bit/pillow*.whl >/dev/null 2>&1; then
+        PILLOW_FILE=$(basename $(ls req_libraries_32bit/pillow*.whl | head -1))
+        echo "   🖼️  PILLOW: $PILLOW_FILE"
+        if [[ "$PILLOW_FILE" == *"armv7l"* ]]; then
+            echo "      ✅ Correct 32-bit architecture"
+        fi
+    fi
+    
+    echo ""
+    echo "✅ 32-bit libraries download completed!"
+    echo ""
+    echo "📋 Next steps:"
+    echo "   1. Copy this folder to your 32-bit Raspberry Pi"
+    echo "   2. Run: ./install_32bit.sh"
+else
+    echo "❌ No wheel files downloaded"
+    echo ""
+    echo "💡 Troubleshooting:"
+    echo "   • Check internet connection"
+    echo "   • Verify requirements.txt exists"
+    echo "   • Some packages may not have 32-bit wheels available"
+fi