feat: improve editor layout flow

- split editor implementation by responsibility

- add editor submit events and soft wrap layout

- support modified enter input for editor submission

src/Example/Program.cs

@@ -290,7 +290,8 @@ file sealed class EditorOverlay : IInputComponent
         {
             Height = 6,
             Placeholder = "在这里输入内容",
-            OnCanceled = SubmitAndClose,
+            OnSubmitted = SubmitAndClose,
+            OnCanceled = CancelAndClose,
         };
         _editor.SetHistory(_history);
         _box = new Box(
@@ -302,7 +303,8 @@ file sealed class EditorOverlay : IInputComponent
                         "Home/End 行首行尾 Ctrl+Left/Right 按词移动\n" +
                         "Ctrl+Backspace/Delete 按词删除 Ctrl+Z/Y 撤销重做\n" +
                         "Ctrl+C 清空当前内容但保留历史记录\n" +
-                        "空内容时 Up/Down 浏览历史 Esc 提交并关闭"),
+                        "Enter 换行 Ctrl+Enter 或 Esc 提交并关闭\n" +
+                        "长行会按弹层宽度软换行 Up/Down 按视觉行移动"),
                     new Text(),
                     _editor,
                 },
@@ -319,23 +321,29 @@ file sealed class EditorOverlay : IInputComponent
     {
         if (input is { Kind: TuiInputEventKind.Key, Value: KeyNames.Escape })
         {
-            SubmitAndClose();
+            _editor.Submit();
             return;
         }
 
         _editor.HandleInput(input);
     }
 
-    private void SubmitAndClose()
+    private void SubmitAndClose(string text)
     {
-        var value = _editor.Value.Trim();
+        var value = text.Trim();
         if (value.Length > 0)
         {
             _history.Remove(value);
             _history.Insert(0, value);
         }
 
-        _addEvent($"Edited {Math.Max(1, _editor.Value.Split('\n').Length)} line(s)");
+        _addEvent($"Editor submitted {Math.Max(1, text.Split('\n').Length)} line(s)");
+        _runtime.HideOverlay();
+    }
+
+    private void CancelAndClose()
+    {
+        _addEvent("Editor canceled");
         _runtime.HideOverlay();
     }
 }