逻辑修改

src/core/window/css/window-form.scss

@@ -1,3 +1,5 @@
+$titleBarHeight: 40px;
+
 /* 窗体容器 */
 .window {
   width: 100%;
@@ -15,6 +17,8 @@
   justify-content: space-between;
   align-items: center;
   user-select: none;
+  width: 100%;
+  height: $titleBarHeight;
 
   .title {
     display: block;
@@ -24,6 +28,7 @@
     white-space: nowrap;
     text-overflow: ellipsis;
     font-size: 18px;
+    line-height: $titleBarHeight;
   }
 
   .window-controls {
@@ -52,6 +57,7 @@
 
 /* 窗体内容 */
 .window-content {
-  padding: 15px;
+  width: 100%;
+  height: calc(100% - #{$titleBarHeight});
   background-color: #e0e0e0;
 }

src/core/window/impl/WindowFormImpl.ts

@@ -53,7 +53,7 @@ export default class WindowFormImpl implements IWindowForm {
       handle: header,
       snapAnimation: true,
       snapThreshold: 20,
-      boundary: document.body,
+      boundaryElement: document.body,
       taskbarElementId: '#taskbar',
       onWindowStateChange: (state) => {
         if (state === 'maximized') {