fix dashboard statistic and login guard warnings

frontend/platform_admin/src/views/dashboard/DashboardPage.vue

@@ -4,8 +4,14 @@
       <a-grid :cols="{ xs: 1, sm: 2, lg: 4 }" :col-gap="16" :row-gap="16">
         <a-grid-item v-for="item in cards" :key="item.key">
           <a-card :bordered="false" class="metric-card">
-            <a-statistic :title="item.label" :value="overview[item.key]" :precision="item.money ? 2 : 0"
-              :prefix="item.money ? '¥' : undefined" show-group-separator />
+            <a-statistic
+              :title="item.label"
+              :value="overview[item.key]"
+              :precision="item.money ? 2 : 0"
+              show-group-separator
+            >
+              <template v-if="item.money" #prefix>¥</template>
+            </a-statistic>
             <div class="metric-hint">{{ item.hint }}</div>
           </a-card>
         </a-grid-item>