feat: added deletion of the first or last element

include/zh_vector.h

@@ -191,6 +191,38 @@ extern "C"
      */
     esp_err_t zh_vector_delete_item(zh_vector_t **vector, uint16_t index);
 
+    /**
+     * @brief Removes the last element from the vector.
+     *
+     * The element's memory is freed. If the size drops below half of the capacity,
+     * the capacity is reduced (same behaviour as zh_vector_delete_item).
+     *
+     * @note Thread-safe: internally locks/unlocks the mutex.
+     *
+     * @param[in,out] vector Double pointer to vector structure (must be initialized).
+     *
+     * @return ESP_OK on success.
+     * @return ESP_ERR_INVALID_ARG if `vector == NULL` or `*vector == NULL` (not initialized) or vector is empty.
+     * @return ESP_ERR_INVALID_STATE if the internal mutex cannot be acquired.
+     */
+    esp_err_t zh_vector_delete_back(zh_vector_t **vector);
+
+    /**
+     * @brief Removes the first element from the vector.
+     *
+     * The element's memory is freed, and all subsequent elements are shifted left by one.
+     * If the size drops below half of the capacity, the capacity is reduced (same behaviour as zh_vector_delete_item).
+     *
+     * @note Thread-safe: internally locks/unlocks the mutex.
+     *
+     * @param[in,out] vector Double pointer to vector structure (must be initialized).
+     *
+     * @return ESP_OK on success.
+     * @return ESP_ERR_INVALID_ARG if `vector == NULL` or `*vector == NULL` (not initialized) or vector is empty.
+     * @return ESP_ERR_INVALID_STATE if the internal mutex cannot be acquired.
+     */
+    esp_err_t zh_vector_delete_front(zh_vector_t **vector);
+
     /**
      * @brief Removes duplicate items from the vector, keeping only the first occurrence of each value.
      *