fix: 修复权重指示器显示错误的分类数量问题

- 修改 SegmentWeightIndicator 只统计实际选择的分类数量
- 对于按顺序匹配规则，只显示用户选择的分类权重统计
- 传递 segmentMatchingRule 参数以获取准确的分类选择信息
- 解决显示'4 分类'但实际只选择2个分类的问题

apps/desktop/src/components/template/SegmentWeightIndicator.tsx

@@ -1,6 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import { CogIcon, ArrowPathIcon } from '@heroicons/react/24/outline';
-import { TemplateSegmentWeightHelper } from '../../types/template';
+import { TemplateSegmentWeightHelper, SegmentMatchingRuleHelper } from '../../types/template';
 import { TemplateSegmentWeightService } from '../../services/templateSegmentWeightService';
 
 interface SegmentWeightIndicatorProps {
@@ -8,6 +8,8 @@ interface SegmentWeightIndicatorProps {
   templateId: string;
   /** 轨道片段ID */
   trackSegmentId: string;
+  /** 片段匹配规则 - 用于确定实际选择的分类 */
+  segmentMatchingRule?: any;
   /** 是否禁用编辑 */
   disabled?: boolean;
   /** 点击编辑按钮的回调 */
@@ -25,6 +27,7 @@ interface SegmentWeightIndicatorProps {
 export const SegmentWeightIndicator: React.FC<SegmentWeightIndicatorProps> = ({
   templateId,
   trackSegmentId,
+  segmentMatchingRule,
   disabled = false,
   onEditClick,
   onWeightsUpdated,
@@ -53,8 +56,27 @@ export const SegmentWeightIndicator: React.FC<SegmentWeightIndicatorProps> = ({
 
       setHasCustomWeights(hasCustom);
 
-      // 计算权重摘要
+      // 计算权重摘要 - 只统计实际选择的分类
-      const weightValues = Object.values(weights);
+      let relevantWeights: Record<string, number> = {};
+
+      if (segmentMatchingRule && SegmentMatchingRuleHelper.isPriorityOrder(segmentMatchingRule)) {
+        // 对于按顺序匹配规则，只统计选择的分类
+        const selectedCategoryIds = typeof segmentMatchingRule === 'object' && 'PriorityOrder' in segmentMatchingRule
+          ? segmentMatchingRule.PriorityOrder.category_ids
+          : [];
+
+        // 只包含选择的分类的权重
+        relevantWeights = Object.fromEntries(
+          Object.entries(weights).filter(([classificationId]) =>
+            selectedCategoryIds.includes(classificationId)
+          )
+        );
+      } else {
+        // 对于其他规则类型，使用所有权重
+        relevantWeights = weights;
+      }
+
+      const weightValues = Object.values(relevantWeights);
       if (weightValues.length > 0) {
         const totalClassifications = weightValues.length;
         const averageWeight = weightValues.reduce((sum, weight) => sum + weight, 0) / totalClassifications;
@@ -65,6 +87,8 @@ export const SegmentWeightIndicator: React.FC<SegmentWeightIndicatorProps> = ({
           averageWeight: Math.round(averageWeight * 10) / 10,
           maxWeight,
         });
+      } else {
+        setWeightSummary(null);
       }
     } catch (error) {
       console.error('加载权重信息失败:', error);

apps/desktop/src/components/template/TemplateDetailModal.tsx

@@ -795,6 +795,7 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
                                         <SegmentWeightIndicator
                                           templateId={currentTemplate.id}
                                           trackSegmentId={segment.id}
+                                          segmentMatchingRule={segment.matching_rule}
                                           onEditClick={() => toggleWeightEditor(segment.id)}
                                           onWeightsUpdated={handleWeightsUpdated}
                                           className="inline-block"