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

lib/input_manager.cpp

@@ -93,6 +93,14 @@ InputEvent InputManager::process_touch_input(uint32_t* last_time) {
     // Determine event type
     if (*last_time == 0) {
         event.type = INPUT_TOUCH_DOWN;
+
+        // Check for virtual buttons
+        InputType virtual_type;
+        if (check_virtual_buttons(event.x, event.y, virtual_type)) {
+            event.type = virtual_type;
+            event.button_id = (virtual_type == INPUT_BUTTON_0) ? 0 : 1;
+            printf("Virtual button %d pressed via touch\n", event.button_id);
+        }
     } else {
         event.type = INPUT_TOUCH_MOVE;
     }
@@ -164,3 +172,38 @@ const char* InputManager::get_gesture_name(uint8_t gesture_code) {
         default: return "Unknown";
     }
 }
+
+void InputManager::get_virtual_button_regions(int* a_rect, int* b_rect) const {
+    for (int i = 0; i < 4; i++) {
+        a_rect[i] = v_button_a[i];
+        b_rect[i] = v_button_b[i];
+    }
+}
+
+void InputManager::set_virtual_button_regions(int ax, int ay, int aw, int ah, int bx, int by, int bw, int bh) {
+    v_button_a[0] = ax; v_button_a[1] = ay; v_button_a[2] = aw; v_button_a[3] = ah;
+    v_button_b[0] = bx; v_button_b[1] = by; v_button_b[2] = bw; v_button_b[3] = bh;
+    v_buttons_active = true;
+}
+
+void InputManager::clear_virtual_button_regions() {
+    v_buttons_active = false;
+}
+
+bool InputManager::check_virtual_buttons(int16_t x, int16_t y, InputType& out_type) const {
+    if (!v_buttons_active) return false;
+
+    if (x >= v_button_a[0] && x <= v_button_a[0] + v_button_a[2] && 
+        y >= v_button_a[1] && y <= v_button_a[1] + v_button_a[3]) {
+        out_type = INPUT_BUTTON_0;
+        return true;
+    }
+    
+    if (x >= v_button_b[0] && x <= v_button_b[0] + v_button_b[2] && 
+        y >= v_button_b[1] && y <= v_button_b[1] + v_button_b[3]) {
+        out_type = INPUT_BUTTON_1;
+        return true;
+    }
+    
+    return false;
+}