Complete auto-startup installation system for Raspberry Pi Zero

- Enhanced install_minimal_xorg.sh with full automatic startup configuration
- Added systemd service for robust signage player auto-start
- Configured autologin and X server auto-launch on boot
- Added multiple startup methods (systemd, bashrc, rc.local) for reliability
- Disabled screen blanking and power management for kiosk operation
- Updated requirements.txt with proper version specifications
- Fixed run_tkinter_debug.sh for correct directory structure
- Added comprehensive logging and error handling
- Optimized for headless Raspberry Pi Zero deployment

Features:
✅ Plug-and-play operation - boots directly to signage player
✅ Automatic restart on crashes
✅ Multiple fallback startup methods
✅ Complete dependency installation
✅ Service management commands
✅ Hardware optimizations for digital signage

run_tkinter_debug.sh

@@ -1,14 +1,40 @@
 #!/bin/bash
 # Debugging launch script for the tkinter player application
 
-# Activate the virtual environment
-source venv/bin/activate
+# Set working directory to script location
+cd "$(dirname "$0")"
 
-# Change to the tkinter app src directory
-cd signage_player/src
+# Activate the virtual environment if it exists
+if [ -d "venv" ]; then
+    source venv/bin/activate
+    echo "Virtual environment activated"
+else
+    echo "Warning: No virtual environment found, using system Python"
+fi
+
+# Set environment variables for better display on Raspberry Pi
+export DISPLAY=${DISPLAY:-:0.0}
+export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR:-/tmp/runtime-pi}
+
+# Change to the signage_player directory
+cd signage_player
 
 # Run the main application with full error output
-python main.py
+echo "Starting tkinter player..."
+echo "Working directory: $(pwd)"
+echo "Python path: $(which python3)"
+echo "Display: $DISPLAY"
+
+# Run with error logging
+python3 main.py 2>&1 | tee ../main_data/app_debug.log
+
+# Capture exit code
+EXIT_CODE=$?
 
 # Deactivate virtual environment when done
-deactivate
+if [ -d "../venv" ]; then
+    deactivate
+fi
+
+echo "Application exited with code: $EXIT_CODE"
+exit $EXIT_CODE