fix: 完善

src/heurams/interface/screens/memorizor.py

@@ -18,7 +18,7 @@ class AtomState(Enum):
 class MemScreen(Screen):
     BINDINGS = [
         ("q", "pop_screen", "返回"),
-        #("p", "prev", "上一个"),
+        ("p", "prev", "复习上一个"),
         ("d", "toggle_dark", "改变色调"),
         ("v", "play_voice", "朗读"),
     ]
@@ -58,6 +58,7 @@ class MemScreen(Screen):
 
     def on_button_pressed(self, event):
         event.stop()
+        if 
 
     def action_play_voice(self):
         """朗读当前内容"""