fix: 修复消息处理导致的闪退问题

src/heurams/interface/screens/preparation.py

@@ -35,9 +35,9 @@ class PreparationScreen(Screen):
         yield Header(show_clock=True)
         with Container(id="vice_container"):
             yield Label(f"准备就绪: [b]{self.nucleon_file.stem}[/b]\n")
-            yield Label(f"内容源文件对象: ./nucleon/[b]{self.nucleon_file.name}[/b].toml")
-            yield Label(f"元数据文件对象: ./electron/[b]{self.electron_file.name}[/b].toml")
-            yield Label(f"\n单元数量:{len(self.nucleons_with_orbital)}\n")
+            yield Label(f"内容源文件对象: ./nucleon/[b]{self.nucleon_file.name}[/b]")
+            yield Label(f"元数据文件对象: ./electron/[b]{self.electron_file.name}[/b]")
+            yield Label(f"\n单元数量: {len(self.nucleons_with_orbital)}\n")
 
             yield Button(
                     "开始记忆",
@@ -75,7 +75,8 @@ class PreparationScreen(Screen):
     def action_quit_app(self):
         self.app.exit()
 
-    def on_button_pressed(self, event) -> None:
+    def on_button_pressed(self, event: Button.Pressed) -> None:
+        event.stop()
         if event.button.id == "start_memorizing_button":
             atoms = list()
             for nucleon, orbital in self.nucleons_with_orbital:
@@ -97,4 +98,5 @@ class PreparationScreen(Screen):
             memscreen = MemScreen(atoms)
             self.app.push_screen(memscreen)
         elif event.button.id == "precache_button":
-            self.action_precache()
+            self.action_precache()
+