添加采样率估计功能，优化界面布局和交互逻辑

func/utils/Constants.py

@@ -182,6 +182,10 @@ class Constants:
     APPROXIMATELY_EPOCH_GET_FINISHED: str = "获取epoch完成"
     APPROXIMATELY_EPOCH_GET_FAILURE: str = "获取epoch失败"
 
+    APPROXIMATELY_ESTIMATE_FREQUENCY_CALCULATING: str = "正在估计采样率"
+    APPROXIMATELY_ESTIMATE_FREQUENCY_FINISHED: str = "估计采样率完成"
+    APPROXIMATELY_ESTIMATE_FREQUENCY_FAILURE: str = "估计采样率失败"
+
     # 预处理
     PREPROCESS_PLOT_LABEL_ORIGINAL_DATA: str = "Original_Data"
     PREPROCESS_PLOT_LABEL_PROCESSED_DATA: str = "Processed_Data"