fix: 更新所有图标为 JRD

- 任务栏图标使用 nativeImage
- Linux 使用 app.setIcon()
- TitleBar logo 改为 JRD
- MainArea placeholder 改为 JRD

src/main/index.ts

@@ -1,19 +1,25 @@
 // src/main/index.ts
-import { app, BrowserWindow, nativeTheme } from 'electron'
+import { app, BrowserWindow, nativeTheme, nativeImage } from 'electron'
 import { join } from 'path'
 import { restoreAndTrack } from './win-state'
 import { registerIpcHandlers } from './ipc-handlers'
 
 let mainWindow: BrowserWindow | null = null
 
+function getIconPath(): string {
+  return join(__dirname, '../../build/icons/icon_256.png')
+}
+
 function createWindow(): void {
+  const iconPath = getIconPath()
+
   mainWindow = new BrowserWindow({
     width: 1200,
     height: 800,
     minWidth: 900,
     minHeight: 600,
     title: 'JRedisDesktop',
-    icon: join(__dirname, '../../build/icons/icon_256.png'),
+    icon: nativeImage.createFromPath(iconPath),
     backgroundColor: nativeTheme.shouldUseDarkColors ? '#0f0f1a' : '#f8fafc',
     webPreferences: {
       preload: join(__dirname, '../preload/index.mjs'),
@@ -25,6 +31,11 @@ function createWindow(): void {
     titleBarStyle: 'hidden',
   })
 
+  // Linux taskbar icon
+  if (process.platform === 'linux') {
+    app.setIcon(iconPath)
+  }
+
   restoreAndTrack(mainWindow)
 
   if (process.env.ELECTRON_RENDERER_URL) {