easter: add easter_egg

Source/sys-clk/overlay/src/ui/gui/ult_ext.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <tesla.hpp>
+
+class ImageElement : public tsl::elm::ListItem {
+private:
+    const uint8_t* imgData;
+    uint32_t imgWidth, imgHeight;
+    
+public:
+    ImageElement(const uint8_t* data, uint32_t w, uint32_t h) 
+        : tsl::elm::ListItem(""), imgData(data), imgWidth(w), imgHeight(h) {}
+    
+    virtual void draw(tsl::gfx::Renderer *renderer) override {
+        // Draw image centered horizontally
+        u16 centerX = this->getX() + (this->getWidth() - imgWidth) / 2;
+        renderer->drawBitmap(
+            centerX, 
+            this->getY() + 10, 
+            imgWidth, 
+            imgHeight, 
+            imgData
+        );
+    }
+    
+    virtual void drawHighlight(tsl::gfx::Renderer *renderer) override {
+        // Do nothing - no highlight
+    }
+    
+    virtual bool onClick(u64 keys) override {
+        return false; // Non-clickable
+    }
+    
+    virtual Element* requestFocus(Element *oldFocus, tsl::FocusDirection direction) override {
+        return nullptr; // Make it non-focusable so it can't be selected
+    }
+};