fix: 修复数据分析页面核心指标统计，分离待处理和进行中任务计数

backend/src/main/java/com/designhub/service/AnalyticsService.java

@@ -379,8 +379,14 @@ public class AnalyticsService {
             .filter(t -> "completed".equals(t.getStatus()))
             .count();
         
+        // 待处理：只包含 pending 状态（不包含 in_progress）
         int pendingDemands = (int) tasks.stream()
-            .filter(t -> Arrays.asList("pending", "in_progress", "submitted").contains(t.getStatus()))
+            .filter(t -> "pending".equals(t.getStatus()))
+            .count();
+        
+        // 进行中：只包含 in_progress 状态
+        int inProgressDemands = (int) tasks.stream()
+            .filter(t -> "in_progress".equals(t.getStatus()))
             .count();
         
         int canceledDemands = (int) tasks.stream()
@@ -423,6 +429,7 @@ public class AnalyticsService {
             .monthDemands(monthDemands)
             .completedDemands(completedDemands)
             .pendingDemands(pendingDemands)
+            .inProgressDemands(inProgressDemands)
             .canceledDemands(canceledDemands)
             .totalScoreUsed(totalScoreUsed)
             .todayScoreUsed(todayScoreUsed)

backend/src/main/java/com/designhub/vo/DemandStatisticsVO.java

@@ -129,7 +129,8 @@ public class DemandStatisticsVO {
         private Integer weekDemands;           // 本周需求数
         private Integer monthDemands;          // 本月需求数
         private Integer completedDemands;      // 已完成数
-        private Integer pendingDemands;        // 进行中数
+        private Integer pendingDemands;        // 待处理数（pending状态）
+        private Integer inProgressDemands;     // 进行中数（in_progress状态）
         private Integer canceledDemands;       // 已取消数
         private BigDecimal totalScoreUsed;     // 总积分消耗
         private BigDecimal todayScoreUsed;     // 今日积分消耗

frontend/src/views/Analytics.vue

@@ -707,6 +707,7 @@ const statistics = reactive<DemandStatistics>({
     monthDemands: 0,
     completedDemands: 0,
     pendingDemands: 0,
+    inProgressDemands: 0,
     canceledDemands: 0,
     totalScoreUsed: 0,
     todayScoreUsed: 0,
@@ -812,8 +813,9 @@ const stageChartRef = ref<HTMLElement>()
 // 计算属性
 const overview = computed(() => statistics.overview)
 
+// 进行中任务数：直接使用后端返回的 inProgressDemands
 const inProgressCount = computed(() => {
-  return overview.value.totalDemands - overview.value.completedDemands - overview.value.pendingDemands - overview.value.canceledDemands
+  return overview.value.inProgressDemands || 0
 })
 
 const completionRate = computed(() => {