增加了返回首页的功能。

data_management/app.py

@@ -85,6 +85,7 @@ class DataManagementApp:
         self.preview_panel.pack(side="left", fill="both", expand=True, padx=5)
         
         # 绑定分页事件
+        self.preview_panel.first_page_btn.configure(command=self._on_first_page)
         self.preview_panel.prev_btn.configure(command=self._on_prev_page)
         self.preview_panel.next_btn.configure(command=self._on_next_page)
         
@@ -152,6 +153,12 @@ class DataManagementApp:
         # 更新统计面板
         self.statistics_panel.update_statistics(stats)
     
+    def _on_first_page(self):
+        """首页"""
+        current_page = self.preview_panel.get_current_page()
+        if current_page > 1:
+            self._load_data(page=1)
+    
     def _on_prev_page(self):
         """上一页"""
         current_page = self.preview_panel.get_current_page()