```

feat(popup): 移除画板功能并调整弹窗尺寸

- 删除了画板菜单项及相关功能代码
- 移除了画板相关的导入和函数定义
- 将弹窗默认项目数从3调整为2，减小弹窗高度
- 更新了弹窗尺寸计算逻辑以适应新的项目数量
```

src-tauri/src/window/create_popup_window.rs

@@ -49,7 +49,7 @@ pub async fn create_popup_window_impl<R: Runtime>(app: &AppHandle<R>, target: &T
 /// 根据用户登录状态和课程选择情况动态计算弹出窗口高度
 pub fn calculate_popup_size_sync() -> PopupSize {
     // 默认基础项目数
-    let item_num = 3;
+    let item_num = 2;
     // 根据项目数计算高度，每个项目40像素，加上边距2像素
     let popup_height = 40 * item_num + 2;
     let popup_width = 180;

src/other_pages/popup-window/popup-window.vue

@@ -11,11 +11,6 @@
           <fluent-window24-regular class="menu-icon"></fluent-window24-regular>
           <span id="drawing-board-text">打开主窗口</span>
         </div>
-        <!-- 画板 -->
-        <div class="menu-item" @click="openBoardWindow">
-          <fluent-hand-draw24-regular class="menu-icon"></fluent-hand-draw24-regular>
-          <span id="drawing-board-text">打开画板</span>
-        </div>
         <!-- 退出应用程序 -->
         <div class="menu-item" @click="exitApp">
           <solar-power-linear class="menu-icon"> </solar-power-linear>
@@ -29,14 +24,13 @@
 <script setup lang="ts">
   import { computed, nextTick, onMounted, onUnmounted, ref, useTemplateRef } from 'vue';
   import FluentWindow24Regular from '~icons/fluent/window-24-regular';
-  import FluentHandDraw24Regular from '~icons/fluent/hand-draw-24-regular';
   import SolarPowerLinear from '~icons/solar/power-linear';
   import { playPromptTone } from '@/utils/prompt-tone';
   import type { Placement } from '@/utils/tauri/windows-util';
   import { WebviewWindow } from '@tauri-apps/api/webviewWindow';
   import { exit } from '@tauri-apps/plugin-process';
   import type { UnlistenFn } from '@tauri-apps/api/event';
-  import { createDrawingBoardWindow, createMainWindow } from '@/utils/tauri/windows-action';
+  import { createMainWindow } from '@/utils/tauri/windows-action';
 
   const webviewWindow = WebviewWindow.getCurrent();
   const placement = ref<Placement>('auto');
@@ -91,15 +85,6 @@
     hideWindow();
   }
 
-  /**
-   * 打开画板窗口
-   */
-  async function openBoardWindow() {
-    playPromptTone();
-    await createDrawingBoardWindow();
-    hideWindow();
-  }
-
   /**
    * 退出登录
    */