feat(cost): 新增成本趋势图表管理功能与汇总数据保存

1.  为comprehensive.vue新增保存汇总数据到报表配置的逻辑
2.  重构trend.vue的筛选交互为图表管理面板，支持显示隐藏、排序系列，配置持久化到localStorage
3.  替换原有的明细数据拉取逻辑为读取报表配置获取汇总数据

klp-ui/src/views/cost/comprehensive.vue

@@ -938,6 +938,41 @@ export default {
           await batchSaveProdMetricResult({ resultIds, prodMetricResultList: metricResultList })
         }
 
+        // 保存汇总数据到报表config
+        const summaryRows = this.summaryRows
+        const sumRow = summaryRows.find(r => r.$summaryType === 'sum')
+        const avgRow = summaryRows.find(r => r.$summaryType === 'avg')
+        const buildSummaryMap = (row) => {
+          const map = {}
+          if (!row) return map
+          this.allCols.forEach(col => {
+            const hdr = col.$type === 'detail'
+              ? (col.itemName || col.itemCode) + (col.unit ? '(' + col.unit + ')' : '')
+              : col.metricName + (col.unit ? '(' + col.unit + ')' : '')
+            if (col.isShift) {
+              if (col.$type === 'detail') {
+                const v1 = row['q' + col.itemId + '_1']
+                const v2 = row['q' + col.itemId + '_2']
+                if (v1 != null) map[hdr + '(甲)'] = v1
+                if (v2 != null) map[hdr + '(乙)'] = v2
+              } else {
+                const v1 = row['mv' + col.mIdx + '_1']
+                const v2 = row['mv' + col.mIdx + '_2']
+                if (v1 != null) map[hdr + '(甲)'] = v1
+                if (v2 != null) map[hdr + '(乙)'] = v2
+              }
+            } else {
+              const v = col.$type === 'detail' ? row['q' + col.itemId] : row['mv' + col.mIdx]
+              if (v != null) map[hdr] = v
+            }
+          })
+          return map
+        }
+        const cfg = JSON.parse(this.activeReport.colConfig || '{}')
+        cfg.avg = buildSummaryMap(avgRow)
+        cfg.sum = buildSummaryMap(sumRow)
+        await updateProdReport({ reportId: rid, colConfig: JSON.stringify(cfg) })
+
         this.$modal.msgSuccess("保存成功"); await this.loadGrid()
       } catch(e) { this.$modal.msgError("保存失败") } finally { this.saving = false }
     },