Add virtual touch buttons for Monopoly game and centralize configuration in ModalButtonHelper

games/monopoly/ModalButtonHelper.h

@@ -0,0 +1,60 @@
+// ModalButtonHelper.h
+#pragma once
+#include "../../lib/input_manager.h"
+#include "../../display/low_level_render.h"
+
+class ModalButtonHelper {
+public:
+    /**
+     * @brief Sets the standard Monopoly virtual button regions
+     */
+    static void set_monopoly_regions(InputManager* input_manager, uint16_t width, uint16_t height) {
+        if (!input_manager) return;
+        
+        // --- BUTTON CONFIGURATION ---
+        // Adjust these variables to move the virtual buttons easily
+        int btn_w = 60;
+        int btn_h = 60;
+        int margin_right = 135; // Positioned for the inner board area (W - 135 = 345)
+        int start_y = 80;       // Vertical start position
+        int spacing = 30;       // Gap between buttons
+        
+        int btn_x = width - margin_right;
+        int btn_a_y = start_y;
+        int btn_b_y = btn_a_y + btn_h + spacing;
+
+        // Apply regions to input manager
+        input_manager->set_virtual_button_regions(
+            btn_x, btn_a_y, btn_w, btn_h,   // Button A (Top)
+            btn_x, btn_b_y, btn_w, btn_h    // Button B (Bottom)
+        );
+    }
+
+    /**
+     * @brief Draws virtual A and B buttons at consistent screen locations
+     */
+    static void draw_virtual_buttons(LowLevelRenderer* renderer, InputManager* input_manager) {
+        if (!renderer || !input_manager) return;
+
+        int a[4], b[4];
+        input_manager->get_virtual_button_regions(a, b);
+
+        // Save current color
+        bool original_color = renderer->get_current_text_color();
+
+        // Draw Button A (Top)
+        renderer->draw_filled_rectangle(a[0], a[1], a[2], a[3], false, 0); // White back
+        renderer->draw_rectangle(a[0], a[1], a[2], a[3], true, 2); // Black border
+        renderer->set_text_color(true);
+        renderer->draw_string_scaled(a[0] + (a[2] - 12) / 2, a[1] + (a[3] - 16) / 2, "A", 2);
+
+        // Draw Button B (Under A)
+        renderer->draw_filled_rectangle(b[0], b[1], b[2], b[3], false, 0); // White back
+        renderer->draw_rectangle(b[0], b[1], b[2], b[3], true, 2); // Black border
+        renderer->set_text_color(true);
+        renderer->draw_string_scaled(b[0] + (b[2] - 12) / 2, b[1] + (b[3] - 16) / 2, "B", 2);
+
+        // Restore color
+        renderer->set_text_color(original_color);
+    }
+};