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/Symptom/SymptomStartSheet.swift

@@ -1,10 +1,11 @@
 import SwiftUI
 import SwiftData
 
-private let symptomPresets: [String] = [
-    "头痛", "咳嗽", "腹痛", "发烧",
-    "恶心", "失眠", "疲劳", "关节痛"
-]
+/// 计算属性形式:每次取值按当前语言解析,语言切换后即时更新(不可用 static/let 缓存)。
+private func symptomPresets() -> [String] {
+    [String(appLoc: "头痛"), String(appLoc: "咳嗽"), String(appLoc: "腹痛"), String(appLoc: "发烧"),
+     String(appLoc: "恶心"), String(appLoc: "失眠"), String(appLoc: "疲劳"), String(appLoc: "关节痛")]
+}
 
 struct SymptomStartSheet: View {
     @Environment(\.modelContext) private var ctx
@@ -77,10 +78,10 @@ struct SymptomStartSheet: View {
 
     private var presetSection: some View {
         VStack(alignment: .leading, spacing: 8) {
-            sectionLabel("常见症状")
+            sectionLabel(String(appLoc: "常见症状"))
             ScrollView(.horizontal, showsIndicators: false) {
                 HStack(spacing: 8) {
-                    ForEach(symptomPresets, id: \.self) { item in
+                    ForEach(symptomPresets(), id: \.self) { item in
                         chip(item, selected: name == item) {
                             name = item
                             customName = ""
@@ -93,7 +94,7 @@ struct SymptomStartSheet: View {
 
     private var customSection: some View {
         VStack(alignment: .leading, spacing: 8) {
-            sectionLabel("或者自己写")
+            sectionLabel(String(appLoc: "或者自己写"))
             TextField("例如：眼皮跳", text: $customName)
                 .textInputAutocapitalization(.never)
                 .padding(.horizontal, 14)
@@ -116,7 +117,7 @@ struct SymptomStartSheet: View {
 
     private var timeSection: some View {
         VStack(alignment: .leading, spacing: 8) {
-            sectionLabel("开始时间")
+            sectionLabel(String(appLoc: "开始时间"))
             DatePicker("", selection: $startedAt, in: ...Date.now)
                 .datePickerStyle(.compact)
                 .labelsHidden()
@@ -126,7 +127,7 @@ struct SymptomStartSheet: View {
     private var severitySection: some View {
         VStack(alignment: .leading, spacing: 8) {
             HStack {
-                sectionLabel("强度")
+                sectionLabel(String(appLoc: "强度"))
                 Spacer()
                 Text("\(Int(severity)) / 5")
                     .font(.system(size: 13, weight: .semibold, design: .monospaced))
@@ -144,7 +145,7 @@ struct SymptomStartSheet: View {
 
     private var noteSection: some View {
         VStack(alignment: .leading, spacing: 8) {
-            sectionLabel("备注（可选）")
+            sectionLabel(String(appLoc: "备注（可选）"))
             TextField("位置、可能诱因…", text: $note, axis: .vertical)
                 .lineLimit(2...4)
                 .padding(.horizontal, 14)