feat(desktop): unify macOS window chrome

desktopApp/src/main/kotlin/com/vnidrop/app/main.kt

@@ -1,6 +1,26 @@
 package com.vnidrop.app
 
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.BasicText
+import androidx.compose.foundation.window.WindowDraggableArea
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.awt.awtEventOrNull
+import androidx.compose.ui.input.pointer.PointerEventType
+import androidx.compose.ui.input.pointer.onPointerEvent
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.WindowScope
 import androidx.compose.ui.window.application
 import com.vnidrop.app.platform.DesktopAppearanceBridge
 import com.vnidrop.app.feature.send.DesktopShareBridge
@@ -8,11 +28,13 @@ import com.vnidrop.app.feature.receive.ExternalInvitationController
 import com.vnidrop.app.feature.receive.MaxVniDropInvitationBytes
 import com.vnidrop.app.feature.receive.VniDropInvitationExtension
 import com.vnidrop.app.feature.receive.decodeInvitationBytes
+import com.vnidrop.app.ui.theme.LocalVniDropColors
 import java.awt.Desktop
 import java.io.File
 
 fun main(args: Array<String>) {
 	val externalInvitations = ExternalInvitationController()
+	val macOs = DesktopAppearanceBridge.isMacOs()
 	configureMacOsNativeAppearance()
 	configureInvitationOpenHandler(externalInvitations)
 	args.asSequence()
@@ -20,7 +42,7 @@ fun main(args: Array<String>) {
 		.filter { it.extension.equals(VniDropInvitationExtension, ignoreCase = true) }
 		.forEach { externalInvitations.openFile(it) }
 	DesktopAppearanceBridge.applyNativeAppearance = MacOsAppKitAppearance::apply
-	if (System.getProperty("os.name").startsWith("Mac", ignoreCase = true)) {
+	if (macOs) {
 		DesktopShareBridge.shareFile = MacOsShareSheet::share
 	}
 	application {
@@ -28,7 +50,16 @@ fun main(args: Array<String>) {
 			onCloseRequest = ::exitApplication,
 			title = "vnidrop",
 		) {
-			App(rememberJvmAppDependencies(externalInvitations))
+			App(
+				dependencies = rememberJvmAppDependencies(externalInvitations),
+				windowChromeTopInset = if (macOs) MacOsTitleBarHeight else 0.dp,
+				windowContentTopStartRadius = if (macOs) MacOsContentCornerRadius else 0.dp,
+				windowChrome = if (macOs) {
+					{ MacOsTitleBar() }
+				} else {
+					null
+				},
+			)
 		}
 	}
 }
@@ -52,8 +83,47 @@ private fun ExternalInvitationController.openFile(file: File) {
 }
 
 private fun configureMacOsNativeAppearance() {
-	if (!System.getProperty("os.name").startsWith("Mac", ignoreCase = true)) return
+	if (!DesktopAppearanceBridge.isMacOs()) return
 	// AWT reads this before creating the first native window. Runtime theme
 	// changes are handled in the JVM platform appearance hook.
 	System.setProperty("apple.awt.application.appearance", "system")
 }
+
+private val MacOsTitleBarHeight = 28.dp
+private val MacOsTrafficLightsWidth = 76.dp
+private val MacOsContentCornerRadius = 20.dp
+
+@Composable
+@OptIn(ExperimentalComposeUiApi::class)
+private fun WindowScope.MacOsTitleBar() {
+	val colors = LocalVniDropColors.current
+	Box(
+		modifier = Modifier
+			.fillMaxWidth()
+			.height(MacOsTitleBarHeight)
+			.background(colors.backgroundSurface200),
+	) {
+		WindowDraggableArea(
+			modifier = Modifier
+				.fillMaxSize()
+				.padding(start = MacOsTrafficLightsWidth)
+				.onPointerEvent(PointerEventType.Press) { event ->
+					if (event.awtEventOrNull?.clickCount == 2) {
+						DesktopAppearanceBridge.toggleMaximized(window)
+					}
+				},
+		) {
+			Box(modifier = Modifier.fillMaxSize().padding(end = MacOsTrafficLightsWidth)) {
+				BasicText(
+					text = "vnidrop",
+					modifier = Modifier.align(Alignment.Center),
+					style = TextStyle(
+						color = colors.foregroundDefault,
+						fontSize = 13.sp,
+						fontWeight = FontWeight.SemiBold,
+					),
+				)
+			}
+		}
+	}
+}