feat: update window control icons and drawing logic

1. Replaced window_normal.dci with window_restore.dci and
window_quit_full.dci icons
2. Updated icon references in dtk-icon-theme.qrc resource file
3. Simplified title bar button drawing functions to use new icons
instead of manual drawing
4. Modified DStyle implementation to use the new icon assets
5. Improved visual consistency by using pre-made icons rather than
programmatic drawing

The changes were made to:
- Standardize window control icons across the application
- Replace programmatic drawing with higher quality vector icons
- Make the UI more maintainable by using consistent icon assets
- Prepare for future theme support by using icon resources

feat: 更新窗口控制图标和绘制逻辑

1. 用 window_restore.dci 和 window_quit_full.dci 图标替换了
window_normal.dci
2. 更新了 dtk-icon-theme.qrc 资源文件中的图标引用
3. 简化了标题栏按钮绘制函数，使用新图标替代手动绘制
4. 修改了 DStyle 实现以使用新的图标资源
5. 通过使用预制图标而非程序绘制提高了视觉一致性

这些修改的目的是：
- 标准化应用程序中的窗口控制图标
- 用更高质量的矢量图标替代程序绘制
- 通过使用一致的图标资源提高UI可维护性
- 通过使用图标资源为未来主题支持做准备

Author: 18202781743

src/widgets/assets/icons/bloom/window_close.dci

@@ -71,7 +71,8 @@
         <file alias="window_close.dci">bloom/window_close.dci</file>
         <file alias="window_maximize.dci">bloom/window_maximize.dci</file>
         <file alias="window_minimize.dci">bloom/window_minimize.dci</file>
-        <file alias="window_normal.dci">bloom/window_normal.dci</file>
+        <file alias="window_restore.dci">bloom/window_restore.dci</file>
+        <file alias="window_quit_full.dci">bloom/window_quit_full.dci</file>
         <file alias="switch_on.dci">bloom/switch_on.dci</file>
         <file alias="switch_off.dci">bloom/switch_off.dci</file>
         <file alias="radio_checked.dci">bloom/radio_checked.dci</file>

src/widgets/assets/icons/bloom/window_maximize.dci

@@ -736,33 +736,12 @@ void drawTitleBarCloseButton(QPainter *pa, const QRectF &rect)
 
 void drawTitleBarNormalButton(QPainter *pa, const QRectF &rect)
 {
-    drawTitleBarIcon(pa, rect, QLatin1String("window_normal"));
+    drawTitleBarIcon(pa, rect, QLatin1String("window_restore"));
 }
 
 void drawTitleQuitFullButton(QPainter *pa, const QRectF &rect)
 {
-    const QPen pen = pa->pen();
-    pa->setPen(Qt::NoPen);
-    pa->drawRect(rect);
-    QRectF content_rect(0, 0, rect.width() / 5, rect.height() / 5);
-    content_rect.moveCenter(rect.center());
-    pa->setPen(pen);
-    pa->setRenderHint(QPainter::Antialiasing, pa->device()->devicePixelRatioF() > 1.0);
-    qreal x = content_rect.x();
-    qreal y = content_rect.y();
-    qreal w = content_rect.width();
-    qreal h = content_rect.height();
-    qreal mean = w / 11;
-
-    QRectF right(x + mean * 6, y, mean * 5, mean * 5);
-    pa->drawLine(QPointF(x + mean * 7, y), QPointF(x + mean * 7, y + mean * 5));
-    pa->drawLine(QPointF(x + mean * 7, y + mean * 5), QPointF(x + w, y + mean * 5));
-    pa->drawPoint(right.center());
-
-    QRectF left(x, y + mean * 6, mean * 5, mean * 5);
-    pa->drawLine(QPointF(x, y + mean * 7), QPointF(x + mean * 5, y + mean * 7));
-    pa->drawLine(QPointF(x + mean * 5, y + mean * 7), QPointF(x + mean * 5, y + h));
-    pa->drawPoint(left.center());
+    drawTitleBarIcon(pa, rect, QLatin1String("window_quit_full"));
 }
 
 void drawArrowUp(QPainter *pa, const QRectF &rect)