refactor(ops): 统计面板变量重命名与 EMPTY_STATS 补全

- hourlyChartRef → heatmapChartRef（实际用于热力图渲染）
- funnelChartRef → statusChartRef（漏斗图已改为状态分布饼图）
- getFunnelChartOptions → getStatusDistributionChartOptions
- EMPTY_STATS 补全 monthlyTrendData 和 badgeQueueStats 字段

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web-antd/src/views/ops/cleaning/work-order/dashboard/index.vue

@@ -100,16 +100,16 @@ const chartLoading = ref(true);
 
 // 图表引用
 const trendChartRef = ref();
-const hourlyChartRef = ref();
+const heatmapChartRef = ref();
 const timeTrendChartRef = ref();
-const funnelChartRef = ref();
+const statusChartRef = ref();
 const functionTypeRankingChartRef = ref();
 const badgeQueueChartRef = ref();
 
 const { renderEcharts: renderTrendChart } = useEcharts(trendChartRef);
-const { renderEcharts: renderHourlyChart } = useEcharts(hourlyChartRef);
+const { renderEcharts: renderHeatmapChart } = useEcharts(heatmapChartRef);
 const { renderEcharts: renderTimeTrendChart } = useEcharts(timeTrendChartRef);
-const { renderEcharts: renderFunnelChart } = useEcharts(funnelChartRef);
+const { renderEcharts: renderStatusChart } = useEcharts(statusChartRef);
 const { renderEcharts: renderFunctionTypeRankingChart } = useEcharts(
   functionTypeRankingChartRef,
 );
@@ -159,6 +159,8 @@ const EMPTY_STATS: DashboardStats = {
   statusDistribution: [],
   heatmapData: { days: [], hours: [], data: [] },
   functionTypeRanking: [],
+  monthlyTrendData: undefined,
+  badgeQueueStats: undefined,
 };
 
 // ========== 图表配置 ==========
@@ -395,7 +397,7 @@ function getTimeTrendChartOptions(): ECOption {
 /**
  * 工单状态分布环形饼图配置
  */
-function getFunnelChartOptions(): ECOption {
+function getStatusDistributionChartOptions(): ECOption {
   const { statusDistribution } = statsData.value;
   const STATUS_COLORS: Record<string, string> = {
     待处理: '#f5a623',
@@ -756,9 +758,9 @@ async function loadStats() {
     chartLoading.value = false;
     await nextTick();
     renderTrendChart(getTrendChartOptions());
-    renderHourlyChart(getHeatmapChartOptions());
+    renderHeatmapChart(getHeatmapChartOptions());
     renderTimeTrendChart(getTimeTrendChartOptions());
-    renderFunnelChart(getFunnelChartOptions());
+    renderStatusChart(getStatusDistributionChartOptions());
     renderFunctionTypeRankingChart(getFunctionTypeRankingChartOptions());
     renderBadgeQueueChart(getBadgeQueueChartOptions());
   } catch {
@@ -914,7 +916,7 @@ onUnmounted(stopPolling);
               </Tooltip>
             </template>
             <Spin :spinning="chartLoading">
-              <EchartsUI ref="hourlyChartRef" class="chart-container" />
+              <EchartsUI ref="heatmapChartRef" class="chart-container" />
             </Spin>
           </Card>
         </Col>
@@ -953,7 +955,7 @@ onUnmounted(stopPolling);
             </template>
             <Spin :spinning="chartLoading">
               <EchartsUI
-                ref="funnelChartRef"
+                ref="statusChartRef"
                 class="chart-container chart-container--medium"
               />
             </Spin>