feat(窗口管理): 添加系统托盘功能并优化窗口关闭行为

- 新增 TrayService 实现系统托盘功能
- 主窗口关闭时默认隐藏而非退出
- 添加 window_zoom 配置项支持窗口缩放
- 引入 TrayServiceToken 作为依赖注入标识
- 通过 isQuitting 状态控制应用退出行为

src/main/services/TrayService.ts

@@ -0,0 +1,58 @@
+import { Service } from '../../shared/kernel'
+import { MainContext } from '../context'
+import { Tray, Menu, app, nativeImage } from 'electron'
+import type { windowManagerOptions } from './WindowManager'
+
+export class TrayService extends Service {
+  private tray: Tray | null = null
+
+  constructor(
+    ctx: MainContext,
+    private readonly opts: windowManagerOptions
+  ) {
+    super(ctx, 'tray')
+  }
+
+  private get mainCtx() {
+    return this.ctx as MainContext
+  }
+
+  public initialize() {
+    const icon = nativeImage.createFromPath(this.opts.icon)
+    this.tray = new Tray(icon)
+
+    const contextMenu = Menu.buildFromTemplate([
+      {
+        label: '显示主窗口',
+        click: () => {
+          this.showMainWindow()
+        }
+      },
+      { type: 'separator' },
+      {
+        label: '退出 SecScore',
+        click: () => {
+          app.quit()
+        }
+      }
+    ])
+
+    this.tray.setToolTip('SecScore 积分管理')
+    this.tray.setContextMenu(contextMenu)
+
+    this.tray.on('double-click', () => {
+      this.showMainWindow()
+    })
+  }
+
+  private showMainWindow() {
+    const mainWin = this.mainCtx.windows.get('main')
+    if (mainWin) {
+      if (mainWin.isMinimized()) mainWin.restore()
+      mainWin.show()
+      mainWin.focus()
+    } else {
+      this.mainCtx.windows.open({ key: 'main', title: 'SecScore', route: '/' })
+    }
+  }
+}