fix: 输入框高度 5→3 + 主显示区 min-height 防塌缩

services/tui_service.py

@@ -556,7 +556,7 @@ class TUIFramework(App):
     Screen {
         layout: grid;
         grid-size: 1 4;
-        grid-rows: auto auto 1fr 5;
+        grid-rows: auto auto 1fr 3;
     }
 
     #monitor-area {
@@ -569,6 +569,7 @@ class TUIFramework(App):
         overflow-y: auto;
         scrollbar-size: 1 1;
         border: solid $primary;
+        min-height: 10;
     }
 
     #input-area {