fix: win10, border (#10753)

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/common.dart

@@ -2566,6 +2566,8 @@ bool get kUseCompatibleUiMode =>
     isWindows &&
     const [WindowsTarget.w7].contains(windowsBuildNumber.windowsVersion);
 
+bool get isWin10 => windowsBuildNumber.windowsVersion == WindowsTarget.w10;
+
 class ServerConfig {
   late String idServer;
   late String relayServer;
@@ -3638,3 +3640,59 @@ extension WorkaroundFreezeLinuxMint on Widget {
     }
   }
 }
+
+// Don't use `extension` here, the border looks weird if using `extension` in my test.
+Widget workaroundWindowBorder(BuildContext context, Widget child) {
+  if (!isWin10) {
+    return child;
+  }
+
+  final isLight = Theme.of(context).brightness == Brightness.light;
+  final borderColor = isLight ? Colors.black87 : Colors.grey;
+  final width = isLight ? 0.5 : 0.1;
+
+  getBorderWidget(Widget child) {
+    return Obx(() =>
+        (stateGlobal.isMaximized.isTrue || stateGlobal.fullscreen.isTrue)
+            ? Offstage()
+            : child);
+  }
+
+  final List<Widget> borders = [
+    getBorderWidget(Container(
+      color: borderColor,
+      height: width + 0.1,
+    ))
+  ];
+  if (kWindowType == WindowType.Main && !isLight) {
+    borders.addAll([
+      getBorderWidget(Align(
+        alignment: Alignment.topLeft,
+        child: Container(
+          color: borderColor,
+          width: width,
+        ),
+      )),
+      getBorderWidget(Align(
+        alignment: Alignment.topRight,
+        child: Container(
+          color: borderColor,
+          width: width,
+        ),
+      )),
+      getBorderWidget(Align(
+        alignment: Alignment.bottomCenter,
+        child: Container(
+          color: borderColor,
+          height: width,
+        ),
+      )),
+    ]);
+  }
+  return Stack(
+    children: [
+      child,
+      ...borders,
+    ],
+  );
+}