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/Indicator/CustomMetricEditor.swift

@@ -64,6 +64,7 @@ struct CustomMetricEditor: View {
     @State private var upper: String = ""
     @State private var icon: String = "circle.fill"
     @State private var hydrated = false
+    @State private var showDeleteConfirm = false
 
     private var trimmedName: String { name.trimmingCharacters(in: .whitespaces) }
     private var trimmedUnit: String { unit.trimmingCharacters(in: .whitespaces) }
@@ -227,13 +228,7 @@ struct CustomMetricEditor: View {
 
     private var deleteButton: some View {
         Button(role: .destructive) {
-            if let m = existing {
-                ReminderService.cancel(metricId: m.seriesKey)
-                ctx.delete(m)
-                try? ctx.save()
-                onSaved(nil)
-                dismiss()
-            }
+            showDeleteConfirm = true
         } label: {
             HStack {
                 Image(systemName: "trash")
@@ -250,6 +245,21 @@ struct CustomMetricEditor: View {
         }
         .buttonStyle(.plain)
         .padding(.top, 8)
+        .alert(String(appLoc: "删除这项自定义指标?"), isPresented: $showDeleteConfirm) {
+            Button(String(appLoc: "删除"), role: .destructive) { deleteMetric() }
+            Button(String(appLoc: "取消"), role: .cancel) { }
+        } message: {
+            Text("删除后不再监测该指标,已记录的历史数据仍保留。")
+        }
+    }
+
+    private func deleteMetric() {
+        guard let m = existing else { return }
+        ReminderService.cancel(metricId: m.seriesKey)
+        ctx.delete(m)
+        try? ctx.save()
+        onSaved(nil)
+        dismiss()
     }
 
     private var footer: some View {

康康/Features/Indicator/IndicatorQuickSheet.swift

@@ -129,7 +129,29 @@ struct IndicatorQuickSheet: View {
         selectedMonitor?.displayName ?? selectedCustom?.name
     }
 
+    /// 数值类指标(血压 / 长期监测 / 自定义)要求填合法数字且在合理范围;
+    /// 化验 / 手动自由值允许非数字(如「阴性」「++」「未见异常」)。
+    /// 返回 nil = 通过;否则为给用户看的一句话原因。脏数据会直接画进趋势图,这里挡在入口。
+    private var numericValidationError: String? {
+        func check(_ s: String, min: Double, max: Double, field: String) -> String? {
+            let t = s.trimmingCharacters(in: .whitespaces)
+            guard !t.isEmpty else { return nil }          // 空值交给下面的非空判断兜底
+            guard let v = Double(t), v.isFinite else { return String(appLoc: "\(field)请填数字") }
+            guard v >= min, v <= max else { return String(appLoc: "\(field)数值超出合理范围") }
+            return nil
+        }
+        if isBP {
+            return check(systolic, min: 30, max: 350, field: String(appLoc: "收缩压"))
+                ?? check(diastolic, min: 20, max: 250, field: String(appLoc: "舒张压"))
+        }
+        if isLongTermMetric {   // 长期监测预设 / 自定义:必须是正数
+            return check(value, min: 0.0001, max: 1_000_000, field: String(appLoc: "数值"))
+        }
+        return nil   // 自由输入(化验 / 手动)允许非数字
+    }
+
     private var canSubmit: Bool {
+        guard numericValidationError == nil else { return false }
         if isBP {
             return !systolic.trimmingCharacters(in: .whitespaces).isEmpty &&
                    !diastolic.trimmingCharacters(in: .whitespaces).isEmpty
@@ -162,6 +184,9 @@ struct IndicatorQuickSheet: View {
                             statusSection
                         }
                     }
+                    if let validationError = numericValidationError {
+                        validationHint(validationError)
+                    }
 
                     timeSection
                     noteSection
@@ -1152,6 +1177,21 @@ struct IndicatorQuickSheet: View {
         return (s.label, s.color)
     }
 
+    // MARK: - 校验提示
+
+    private func validationHint(_ text: String) -> some View {
+        HStack(spacing: 6) {
+            Image(systemName: "exclamationmark.circle.fill")
+                .font(.tjScaled(11))
+                .foregroundStyle(Tj.Palette.brick)
+            Text(text)
+                .font(.tjScaled(12))
+                .foregroundStyle(Tj.Palette.brick)
+            Spacer(minLength: 0)
+        }
+        .transition(.opacity)
+    }
+
     // MARK: - submit
 
     private func submit() {