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/Home/HomeView.swift

@@ -69,17 +69,17 @@ struct HomeView: View {
     }
 
     private var todayLine: String {
-        let f = DateFormatter()
-        f.locale = Locale(identifier: "zh_CN")
-        f.dateFormat = "M 月 d 日 · EEE"
-        return f.string(from: Date())
+        let now = Date()
+        let day = now.formatted(.dateTime.month().day())
+        let weekday = now.formatted(.dateTime.weekday(.abbreviated))
+        return "\(day) · \(weekday)"
     }
 
     private var greetingWord: String {
         switch Calendar.current.component(.hour, from: Date()) {
-        case 5..<12:  return "早安"
-        case 12..<18: return "下午好"
-        default:      return "晚上好"
+        case 5..<12:  return String(appLoc: "早安")
+        case 12..<18: return String(appLoc: "下午好")
+        default:      return String(appLoc: "晚上好")
         }
     }
 
@@ -136,7 +136,7 @@ struct HomeView: View {
 
             Button(action: onTapArchive) {
                 HStack(spacing: 14) {
-                    TjPlaceholder(label: "档案 · \(reports.count)")
+                    TjPlaceholder(label: String(appLoc: "档案 · \(reports.count)"))
                         .frame(width: 56, height: 56)
                     VStack(alignment: .leading, spacing: 2) {
                         Text("我的报告档案")