fix: RESET pin active-LOW and clock edge state reset

tests/gui_tests.rs

@@ -16,10 +16,14 @@ mod gui_test_utils {
     use eframe::egui::{Context, Ui};
 
     /// Create a test GUI context for component testing
+    /// Properly initializes the context with fonts to avoid runtime panics
     pub fn create_test_context() -> Context {
         let ctx = Context::default();
         // Configure for testing
         ctx.set_pixels_per_point(1.0);
+        // Initialize fonts by running an empty context pass
+        // This prevents "No fonts available until first call to Context::run()" panic
+        let _ = ctx.run(egui::RawInput::default(), |_ctx| {});
         ctx
     }