Unified the 400x state machine for address latching

Fixed timing issues

src/gui/components.rs

@@ -77,6 +77,7 @@ pub struct GuiComponents {
     /// CPU register state display
     register_viewer: RegisterViewer,
     /// ROM file loading and management
+    #[allow(dead_code)] // RomLoader is currently a placeholder implementation
     rom_loader: RomLoader,
     /// System status and health monitoring
     status_bar: StatusBar,
@@ -332,6 +333,8 @@ pub struct MemoryViewer {
     /// Display mode: true for hexadecimal, false for decimal
     show_hex: bool,
     /// Number of bytes to display per row (currently fixed at 16)
+    #[allow(dead_code)]
+    // bytes_per_row is currently fixed at 16 but kept for future flexibility
     bytes_per_row: usize,
 }