根据提供的code differences信息，由于没有具体的代码变更内容，我将生成一个通用的commit message模板：

```
docs(readme): 更新文档说明

- 添加了项目使用指南
- 完善了API接口说明
- 修正了一些文字错误
```

注：由于未提供具体的代码差异信息，以上为示例格式。请提供具体的代码变更内容以便生成准确的commit message。

康康/Features/Trends/TrendsView.swift

@@ -22,36 +22,32 @@ struct TrendsView: View {
                            customMetrics: customMetrics)
     }
 
-    private var monitorBuckets: [SeriesBucket] {
-        seriesBuckets.filter { $0.kind == .monitor }
-    }
-    private var labBuckets: [SeriesBucket] {
-        seriesBuckets.filter { $0.kind == .lab }
-    }
-
     private func filtered(_ buckets: [SeriesBucket]) -> [SeriesBucket] {
         let q = query.trimmingCharacters(in: .whitespaces)
         guard !q.isEmpty else { return buckets }
         return buckets.filter { $0.title.localizedCaseInsensitiveContains(q) }
     }
-    private var filteredMonitor: [SeriesBucket] { filtered(monitorBuckets) }
-    private var filteredLab: [SeriesBucket] { filtered(labBuckets) }
 
     var body: some View {
-        NavigationStack {
+        // SeriesBucket.build 一次性算,monitor / lab / 过滤全部本地派生 ——
+        // 杜绝一次渲染(及每次搜索按键)对整张指标表重复 build ~7 次。
+        let series = seriesBuckets
+        let monitor = filtered(series.filter { $0.kind == .monitor })
+        let lab = filtered(series.filter { $0.kind == .lab })
+        return NavigationStack {
             ScrollView(showsIndicators: false) {
                 VStack(alignment: .leading, spacing: 18) {
                     header.padding(.top, 4)
-                    if seriesBuckets.isEmpty {
+                    if series.isEmpty {
                         emptyState
-                    } else if filteredMonitor.isEmpty && filteredLab.isEmpty {
+                    } else if monitor.isEmpty && lab.isEmpty {
                         noMatchState
                     } else {
-                        if !filteredMonitor.isEmpty {
-                            section(title: String(appLoc: "长期监测"), buckets: filteredMonitor)
+                        if !monitor.isEmpty {
+                            section(title: String(appLoc: "长期监测"), buckets: monitor)
                         }
-                        if !filteredLab.isEmpty {
-                            section(title: String(appLoc: "化验指标趋势"), buckets: filteredLab)
+                        if !lab.isEmpty {
+                            section(title: String(appLoc: "化验指标趋势"), buckets: lab)
                         }
                     }
                 }