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/Services/DiaryAssistService.swift

@@ -0,0 +1,101 @@
+import Foundation
+
+/// 「健康记录」AI 辅助:让 LLM 从医生角度提 3-4 个追问问题。
+///
+/// 设计上和 HealthExportService 同款门面,但输出量小(< 400 token),
+/// 不流式 —— 直接 await 收完整结果再解析。
+///
+/// 调用方:DiaryQuickSheet。
+@MainActor
+struct DiaryAssistService {
+    static let shared = DiaryAssistService()
+    private init() {}
+
+    /// 单条追问。fill 是带方括号占位符的模板,采纳时追加到原文末尾。
+    /// `dim` 是问诊维度(取自 `DiaryAssistPrompts.dimensions`),用于跨轮按维度去重。
+    /// `adopted` 由 UI 标记;`round` 由 UI 在 append 前打戳,用于多轮分组显示。
+    struct Question: Identifiable, Hashable {
+        let id: UUID
+        let q: String
+        let fill: String
+        let dim: String
+        var adopted: Bool
+        var round: Int
+
+        init(id: UUID = UUID(),
+             q: String,
+             fill: String,
+             dim: String = "",
+             adopted: Bool = false,
+             round: Int = 0) {
+            self.id = id
+            self.q = q
+            self.fill = fill
+            self.dim = dim
+            self.adopted = adopted
+            self.round = round
+        }
+    }
+
+    enum AssistError: Error, LocalizedError {
+        case modelNotReady
+        case empty
+        case parseFailed(String)
+
+        var errorDescription: String? {
+            switch self {
+            case .modelNotReady:        return String(appLoc: "AI 模型尚未准备好")
+            case .empty:                return String(appLoc: "AI 没有给出建议,请稍后重试")
+            case .parseFailed(let m):   return String(appLoc: "结果解析失败:\(m)")
+            }
+        }
+    }
+
+    /// 返回 3-4 条追问。
+    /// - coveredDimensions: 多轮场景下,把之前各轮已覆盖的维度名(取自 question.dim)传进来,
+    ///   prompt 会明确要求本轮避开这些维度。第一轮传空数组。
+    /// 注意:本方法在 AIRuntime 的 actor 队列里串行排队,与 Capture / Export 互不抢占 GPU。
+    func suggest(content: String,
+                 coveredDimensions: [String] = []) async throws -> (questions: [Question], decodeRate: Double) {
+        do {
+            try await AIRuntime.shared.prepare()
+        } catch {
+            throw AssistError.modelNotReady
+        }
+
+        let prompt = DiaryAssistPrompts.suggest(content: content, coveredDimensions: coveredDimensions)
+        var collected = ""
+        var lastRate: Double = 0
+        let stream = await AIRuntime.shared.generate(prompt: prompt, maxTokens: 400)
+        for try await chunk in stream {
+            collected += chunk.text
+            if chunk.decodeRate > 0 { lastRate = chunk.decodeRate }
+        }
+
+        // 1. 去 <think>...</think>(复用 HealthExportService 的兜底)
+        let stripped = HealthExportService.stripThinkBlocks(collected)
+        // 2. 抠出第一段平衡 JSON(复用 CaptureService.extractJSONObject)
+        let jsonStr = CaptureService.extractJSONObject(from: stripped)
+        guard let data = jsonStr.data(using: .utf8),
+              let obj = try? JSONSerialization.jsonObject(with: data, options: [.fragmentsAllowed]),
+              let dict = obj as? [String: Any] else {
+            throw AssistError.parseFailed("非 JSON 输出")
+        }
+        guard let rawQuestions = dict["questions"] as? [[String: Any]] else {
+            throw AssistError.parseFailed("缺少 questions 字段")
+        }
+        let questions = rawQuestions.compactMap { d -> Question? in
+            guard let q = (d["q"] as? String)?
+                    .trimmingCharacters(in: .whitespacesAndNewlines), !q.isEmpty else {
+                return nil
+            }
+            let fill = (d["fill"] as? String)?
+                .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+            let dim = (d["dim"] as? String)?
+                .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+            return Question(q: q, fill: fill, dim: dim)
+        }
+        guard !questions.isEmpty else { throw AssistError.empty }
+        return (Array(questions.prefix(4)), lastRate)
+    }
+}