input manager provides ground of truth on device input choise

lib/input_manager.h

@@ -55,6 +55,18 @@ public:
      * @return Constant string with gesture name
      */
     static const char* get_gesture_name(uint8_t gesture_code);
+    
+    /**
+     * @brief Check if touch input is available
+     * @return true if touch controller is present, false otherwise
+     */
+    bool has_touch() const;
+    
+    /**
+     * @brief Check if hardware buttons are available
+     * @return true if physical buttons are present, false otherwise
+     */
+    bool has_buttons() const;
 
 private:
     LowLevelTouch* touch;