Refactor RootLayout and UIHandler for improved structure and functionality

- Updated RootLayout to manage layout initialization and deinitialization more effectively.
- Removed unnecessary dependencies and streamlined event handling for keyboard events.
- Enhanced UIHandler to utilize shared pointers for app descriptors, improving memory management.
- Added methods for showing and hiding navigation elements in RootLayout.
- Introduced textarea widget with instant response by disabling animations.
- Improved error handling and logging throughout the UI components.

main/ui/interaction_handler.h

@@ -0,0 +1,70 @@
+#pragma once
+
+#include "esp_err.h"
+#include "lvgl.h"
+#include "ui/events.h"
+
+
+
+/**
+ * @brief Interaction Handler - manages user interactions
+ *
+ * This class is responsible for handling user inputs
+ * such as touch events, button presses, and gestures.
+ * It routes these interactions to the appropriate UI components
+ * or apps based on the current context. And it also handles the respective UI widgets.
+ *
+ * For example, it manages:
+ * Textarea focus and display of the on-screen keyboard
+ */
+class InteractionHandler {
+public:
+
+  InteractionHandler() = default;
+  ~InteractionHandler();
+
+  /**
+   * @brief Initialize the Interaction Handler
+   *
+   * Sets up necessary event listeners and state.
+   *
+   * @return ESP_OK on success, error code otherwise
+   */
+  esp_err_t init(lv_obj_t* app_container);
+
+  /**
+   * @brief Deinitialize the Interaction Handler
+   *
+   * Cleans up resources and event listeners.
+   *
+   * @return ESP_OK on success, error code otherwise
+   */
+  esp_err_t deinit(void);
+
+  /**
+   * @brief Add keyboard support to a textarea widget
+   *
+   * @param text_area Pointer to the textarea lvgl object
+   * @return esp_err_t ESP_OK on success, error code otherwise
+   */
+  esp_err_t register_text_area_keyboard_support(lv_obj_t* text_area);
+
+private:
+
+  // Event handler for keyboard show/hide events
+  // It should be registered with event callbacks of the keyboard object
+  void on_keyboard_event_(lv_event_t* e);
+
+  esp_err_t show_keyboard_for_textarea_(lv_obj_t* textarea);
+  esp_err_t hide_keyboard_(void);
+
+  // Pointers to key UI objects, owned by UIHandler
+  lv_obj_t* app_container_ = nullptr;
+  // owned keyboard object
+  lv_obj_t* keyboard_ = nullptr;
+  // Currently focused textarea, reference only
+  lv_obj_t* focused_textarea_ = nullptr;
+
+  InteractionHandler(const InteractionHandler&) = delete;
+  InteractionHandler& operator=(const InteractionHandler&) = delete;
+};