frontend: FE-027 隐藏式标题栏红绿灯融入顶栏，防启动白闪与顶栏拖拽区

Co-authored-by: Cursor <cursoragent@cursor.com>

mactfsui/electron/main.cjs

@@ -1,4 +1,4 @@
-const { app, BrowserWindow, ipcMain, dialog, shell, nativeImage } = require("electron")
+const { app, BrowserWindow, ipcMain, dialog, shell, nativeImage, nativeTheme } = require("electron")
 const path = require("node:path")
 const fs = require("node:fs")
 const os = require("node:os")
@@ -284,7 +284,16 @@ function createWindow() {
   const mainWindow = new BrowserWindow({
     width: 1280,
     height: 840,
+    minWidth: 980,
+    minHeight: 640,
     title: "MacTFS",
+    // 预设与主题一致的背景色并延迟显示，避免启动白闪。
+    show: false,
+    backgroundColor: nativeTheme.shouldUseDarkColors ? "#1d1d20" : "#fafafa",
+    // macOS 隐藏系统标题栏，红绿灯融入应用顶栏；其它平台回退系统标题栏。
+    ...(process.platform === "darwin"
+      ? { titleBarStyle: "hiddenInset", trafficLightPosition: { x: 16, y: 16 } }
+      : {}),
     ...(iconPath ? { icon: nativeImage.createFromPath(iconPath) } : {}),
     webPreferences: {
       preload: path.join(__dirname, "preload.cjs"),
@@ -293,6 +302,10 @@ function createWindow() {
     },
   })
 
+  mainWindow.once("ready-to-show", () => {
+    mainWindow.show()
+  })
+
   if (process.env.NODE_ENV === "development") {
     mainWindow.loadURL("http://localhost:5173")
     return