feat: 国际化(i18n) en/ja/ko + App 内语言切换

主体:多语言支持(简体中文源 + 英/日/韩)
- 基础设施:Localizable.xcstrings(String Catalog,sourceLanguage=zh-Hans)
  + pbxproj developmentRegion/knownRegions 注册 en/ja/ko
- 全部硬编码 Locale("zh_CN") → Locale.current;中文 dateFormat → Date.FormatStyle(跟随系统)
- UI 中文字面量统一为 String(appLoc:)(显式绑定所选语言 bundle+locale,即时切换)
  Text 字面量走环境 \.locale + Bundle 重定向
- 549 个 catalog key 全部 en/ja/ko 翻译完成(0 未翻译)
- App 内语言切换:我的 → 语言(LanguageManager + 即时生效,无需重启)
- 双用预设(症状/监测指标/慢病)本地化:static→computed 避免缓存

注:本提交为 WIP,一并打包了并行进行的功能模块
(HealthExport 健康导出、Security/Face ID 锁、DiaryAssist 日记 AI 辅助)
及 App 图标、CLAUDE.md、docs/scripts。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

康康/Features/Trends/TrendsView.swift

@@ -6,8 +6,8 @@ enum CalendarMode: String, CaseIterable, Identifiable {
     var id: String { rawValue }
     var label: String {
         switch self {
-        case .month: return "月"
-        case .year:  return "年"
+        case .month: return String(appLoc: "月")
+        case .year:  return String(appLoc: "年")
         }
     }
 }
@@ -31,7 +31,8 @@ struct TrendsView: View {
 
     @State private var mode: CalendarMode = .month
     @State private var anchor: Date = .now
-    @State private var selectedDay: SelectedDay?
+    /// 选中的当天 — 默认选今天,日历下方 inline 显示该日详情
+    @State private var selectedDate: Date = .now
 
     private var profile: UserProfile? { profiles.first }
 
@@ -44,7 +45,7 @@ struct TrendsView: View {
     private let calendar: Calendar = {
         var c = Calendar(identifier: .gregorian)
         c.firstWeekday = 2
-        c.locale = Locale(identifier: "zh_CN")
+        c.locale = Locale.current
         return c
     }()
 
@@ -66,6 +67,9 @@ struct TrendsView: View {
                 anchorBar
                 calendarBody
                 legend
+                if mode == .month {
+                    dayDetailInline
+                }
                 seriesSection
             }
             .padding(.horizontal, 20)
@@ -73,15 +77,31 @@ struct TrendsView: View {
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
         .background(Tj.Palette.sand.ignoresSafeArea())
-        .sheet(item: $selectedDay) { sel in
-            DayDetailSheet(
-                date: sel.date,
+    }
+
+    /// 日历下方 inline 显示选中天的详情(symptoms / indicators / reports / diaries)
+    private var dayDetailInline: some View {
+        VStack(alignment: .leading, spacing: 0) {
+            DayDetailContent(
+                date: selectedDate,
                 indicators: indicators,
                 reports: reports,
                 diaries: diaries,
-                symptoms: symptoms
+                symptoms: symptoms,
+                showHeader: true
             )
+            .padding(14)
         }
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .background(
+            RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                .fill(Tj.Palette.paper)
+        )
+        .overlay(
+            RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                .strokeBorder(Tj.Palette.lineSoft, lineWidth: 1)
+        )
+        .animation(.snappy(duration: 0.2), value: selectedDate)
     }
 
     private var header: some View {
@@ -91,7 +111,10 @@ struct TrendsView: View {
                 .foregroundStyle(Tj.Palette.text)
             Spacer()
             Button {
-                anchor = .now
+                withAnimation(.snappy(duration: 0.2)) {
+                    anchor = .now
+                    selectedDate = .now
+                }
             } label: {
                 Text("回到今天")
                     .font(.system(size: 12))
@@ -164,18 +187,20 @@ struct TrendsView: View {
     }
 
     private var anchorTitle: String {
-        let f = DateFormatter()
-        f.locale = Locale(identifier: "zh_CN")
-        f.dateFormat = mode == .month ? "yyyy 年 M 月" : "yyyy 年"
-        return f.string(from: anchor)
+        let style: Date.FormatStyle = mode == .month
+            ? .dateTime.year().month()
+            : .dateTime.year()
+        return anchor.formatted(style)
     }
 
     @ViewBuilder
     private var calendarBody: some View {
         switch mode {
         case .month:
-            CalendarMonthGrid(monthAnchor: anchor, data: data) { day in
-                selectedDay = SelectedDay(date: day)
+            CalendarMonthGrid(monthAnchor: anchor, data: data, selectedDate: selectedDate) { day in
+                withAnimation(.snappy(duration: 0.2)) {
+                    selectedDate = day
+                }
             }
                 .padding(14)
                 .background(
@@ -231,10 +256,10 @@ struct TrendsView: View {
                 .tracking(0.5)
                 .foregroundStyle(Tj.Palette.text3)
             HStack(spacing: 14) {
-                legendItem(color: Tj.Palette.brick, label: "指标异常")
-                legendItem(color: Tj.Palette.amber, label: "症状持续中")
-                legendItem(color: Tj.Palette.ink2, label: "报告归档")
-                legendItem(color: Tj.Palette.leaf, label: "正常")
+                legendItem(color: Tj.Palette.brick, label: String(appLoc: "指标异常"))
+                legendItem(color: Tj.Palette.amber, label: String(appLoc: "症状持续中"))
+                legendItem(color: Tj.Palette.ink2, label: String(appLoc: "报告归档"))
+                legendItem(color: Tj.Palette.leaf, label: String(appLoc: "正常"))
             }
         }
         .padding(.top, 4)
@@ -268,6 +293,14 @@ struct TrendsView: View {
         if let next = calendar.date(byAdding: component, value: delta, to: anchor) {
             withAnimation(.snappy) {
                 anchor = next
+                // 翻月时把 selection 跟着走:同月内停在今天(如果是当前月)或 1 号
+                if mode == .month {
+                    if calendar.isDate(next, equalTo: .now, toGranularity: .month) {
+                        selectedDate = .now
+                    } else if let first = calendar.dateInterval(of: .month, for: next)?.start {
+                        selectedDate = first
+                    }
+                }
             }
         }
     }