Fix app crash: resolve DISPLAY environment and input device issues

- Fixed start.sh environment variable loading from systemctl
- Use here-document (<<<) instead of pipe for subshell to preserve exports
- Added better error handling for evdev device enumeration
- Added exception handling in intro video playback with detailed logging
- App now properly initializes with DISPLAY=:0 and WAYLAND_DISPLAY=wayland-0

start.sh

@@ -35,12 +35,24 @@ load_user_environment() {
     if command -v systemctl &>/dev/null; then
         user_env=$(systemctl --user show-environment 2>/dev/null)
         if [ -n "$user_env" ]; then
-            # Extract display-related variables
-            echo "$user_env" | grep -E '^(DISPLAY|WAYLAND_DISPLAY|XDG_RUNTIME_DIR|DBUS_SESSION_BUS_ADDRESS)=' | while read -r line; do
-                export "$line"
-            done
+            # Extract display-related variables without subshell to preserve exports
+            while IFS='=' read -r key value; do
+                case "$key" in
+                    DISPLAY|WAYLAND_DISPLAY|XDG_RUNTIME_DIR|DBUS_SESSION_BUS_ADDRESS)
+                        export "$key=$value"
+                        ;;
+                esac
+            done <<< "$user_env"
+            
             log_message "Loaded user environment from systemctl --user"
-            return 0
+            
+            # Verify we got valid display
+            if [ -n "$DISPLAY" ] || [ -n "$WAYLAND_DISPLAY" ]; then
+                log_message "Display environment ready: DISPLAY='$DISPLAY' WAYLAND_DISPLAY='$WAYLAND_DISPLAY'"
+                return 0
+            else
+                log_message "Systemctl didn't provide display variables, trying fallback..."
+            fi
         fi
     fi