refactor: 将置顶项目功能提取为独立组件

frontend/src/components/Dashboard.vue

@@ -7,6 +7,7 @@
         立刻抓取
       </el-button>
     </div>
+    <PinnedProject />
     <el-divider />
     <div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;">
       <h3 style="margin: 0;">Today's Bids</h3>
@@ -65,6 +66,7 @@ import { ref, computed, watch } from 'vue'
 import axios from 'axios'
 import { ElMessage } from 'element-plus'
 import { Refresh, ArrowDown } from '@element-plus/icons-vue'
+import PinnedProject from './PinnedProject.vue'
 
 interface Props {
   todayBids: any[]