refactor(profile,monitor): move height/weight from MonitorMetric to UserProfile

身高/体重对成人变化慢,作为 Profile 静态字段比每次录入 Indicator 更合适。

- MonitorMetric:6 case(从 8 减),删 .height / .weight
- UserProfile:加 weightKG: Double?(支持小数),加 bmi computed
- summaryLine 加体重段:'175cm · 68.5kg'(整数省小数)
- ProfileEditView basics 加 weight 行 + footer 显示 BMI + 分类(偏瘦/正常/超重/肥胖)
- IndicatorQuickSheet:删 .height 回写 Profile 的特殊逻辑
- UserProfileTests:+5 个(weight 字段、summaryLine 含 weight、BMI 计算)

兼容性:老 Indicator 里的 seriesKey 'weight' / 'height' 数据保留(SwiftData String?
不变),只是新录入路径走 Profile 不走 Indicator;Trends 仍能用 String seriesKey
查询历史(如果将来要展示老数据)。

测试:60 case pass / 0 fail / 0 warning。

康康/Models/UserProfile.swift

@@ -3,10 +3,11 @@ import SwiftData
 
 @Model
 final class UserProfile {
-    // —— 核心 4 项 ——
+    // —— 核心 5 项 ——
     var birthYear: Int?           // 1990。隐私考虑只存年,不存月日
     var biologicalSexRaw: String  // "" / "male" / "female"
     var heightCM: Int?
+    var weightKG: Double?         // 体重支持小数(68.5)
     var bloodTypeRaw: String      // "" / "A" / "B" / "AB" / "O"
 
     // —— 健康背景 ——
@@ -22,6 +23,7 @@ final class UserProfile {
     init(birthYear: Int? = nil,
          biologicalSexRaw: String = "",
          heightCM: Int? = nil,
+         weightKG: Double? = nil,
          bloodTypeRaw: String = "",
          allergies: [String] = [],
          chronicConditions: [String] = [],
@@ -31,6 +33,7 @@ final class UserProfile {
         self.birthYear = birthYear
         self.biologicalSexRaw = biologicalSexRaw
         self.heightCM = heightCM
+        self.weightKG = weightKG
         self.bloodTypeRaw = bloodTypeRaw
         self.allergies = allergies
         self.chronicConditions = chronicConditions
@@ -65,19 +68,36 @@ extension UserProfile {
         return Calendar.current.component(.year, from: .now) - y
     }
 
-    /// 给 ProfileCard 一行预览:"38岁 · 男 · 175cm · A型"
+    /// 给 ProfileCard 一行预览:"38岁 · 男 · 175cm · 68kg · A型"
     var summaryLine: String {
         var parts: [String] = []
         if let age { parts.append("\(age)岁") }
         if sex != .undisclosed { parts.append(sex.label) }
         if let h = heightCM { parts.append("\(h)cm") }
+        if let w = weightKG {
+            let s = w.truncatingRemainder(dividingBy: 1) == 0
+                ? String(format: "%.0fkg", w)
+                : String(format: "%.1fkg", w)
+            parts.append(s)
+        }
         if !bloodTypeRaw.isEmpty { parts.append("\(bloodTypeRaw)型") }
         return parts.joined(separator: " · ")
     }
 
     /// 资料是否完整到值得显示 summaryLine(否则提示"完善资料")
     var hasAnyBasics: Bool {
-        birthYear != nil || sex != .undisclosed || heightCM != nil || !bloodTypeRaw.isEmpty
+        birthYear != nil ||
+        sex != .undisclosed ||
+        heightCM != nil ||
+        weightKG != nil ||
+        !bloodTypeRaw.isEmpty
+    }
+
+    /// BMI(kg/m²),需要同时有身高 + 体重才能算
+    var bmi: Double? {
+        guard let h = heightCM, h > 0, let w = weightKG else { return nil }
+        let m = Double(h) / 100.0
+        return w / (m * m)
     }
 }