Initial commit: 健康管家 AI 健康陪伴助手

- Backend: .NET 10 Minimal API + EF Core + PostgreSQL
- Frontend: Flutter + Riverpod + GoRouter + Dio
- AI: DeepSeek LLM + Qwen VLM (OpenAI-compatible)
- Auth: SMS + JWT (access/refresh tokens)
- Features: AI chat, health tracking, medication management, diet analysis, exercise plans, doctor consultations, report analysis

backend/src/Health.Infrastructure/AI/AiClients.cs

@@ -0,0 +1,152 @@
+using Microsoft.Extensions.Configuration;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+
+namespace Health.Infrastructure.AI;
+
+/// <summary>
+/// DeepSeek LLM 客户端（对话 + Tool Calling）
+/// </summary>
+public sealed class DeepSeekClient
+{
+    private readonly HttpClient _http;
+    private readonly string _model;
+    private readonly JsonSerializerOptions _jsonOptions;
+
+    public DeepSeekClient(HttpClient http, IConfiguration config)
+    {
+        _http = http;
+        _model = config["DEEPSEEK_MODEL"] ?? "deepseek-chat";
+        _jsonOptions = new()
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    /// <summary>
+    /// 流式 Chat Completions
+    /// </summary>
+    public async IAsyncEnumerable<string> ChatStreamAsync(
+        List<ChatMessage> messages,
+        List<ToolDefinition>? tools = null,
+        int maxTokens = 2048,
+        float temperature = 0.7f,
+        [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken ct = default)
+    {
+        var request = new ChatCompletionRequest
+        {
+            Model = _model, Messages = messages, Stream = true,
+            MaxTokens = maxTokens, Temperature = temperature, Tools = tools,
+        };
+        if (tools?.Count > 0) request.ToolChoice = "auto";
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+        var httpRequest = new HttpRequestMessage(HttpMethod.Post, "chat/completions") { Content = content };
+        httpRequest.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/event-stream"));
+
+        using var response = await _http.SendAsync(httpRequest, HttpCompletionOption.ResponseHeadersRead, ct);
+        response.EnsureSuccessStatusCode();
+
+        using var stream = await response.Content.ReadAsStreamAsync(ct);
+        using var reader = new StreamReader(stream);
+
+        string? line;
+        while ((line = await reader.ReadLineAsync(ct)) != null)
+        {
+            if (string.IsNullOrWhiteSpace(line)) continue;
+            if (!line.StartsWith("data: ")) continue;
+            var data = line["data: ".Length..];
+            if (data == "[DONE]") break;
+            yield return data;
+        }
+    }
+
+    /// <summary>
+    /// 非流式 Chat Completions（用于 Tool Calling）
+    /// </summary>
+    public async Task<ChatCompletionResponse> ChatAsync(
+        List<ChatMessage> messages,
+        List<ToolDefinition>? tools = null,
+        int maxTokens = 2048,
+        float temperature = 0.7f,
+        CancellationToken ct = default)
+    {
+        var request = new ChatCompletionRequest
+        {
+            Model = _model, Messages = messages, Stream = false,
+            MaxTokens = maxTokens, Temperature = temperature, Tools = tools,
+        };
+        if (tools?.Count > 0) request.ToolChoice = "auto";
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+        var response = await _http.PostAsync("chat/completions", content, ct);
+        response.EnsureSuccessStatusCode();
+
+        var body = await response.Content.ReadAsStringAsync(ct);
+        return JsonSerializer.Deserialize<ChatCompletionResponse>(body, _jsonOptions)!;
+    }
+}
+
+/// <summary>
+/// 千问 VL 视觉客户端（食物识别 + 报告解读）
+/// </summary>
+public sealed class QwenVisionClient
+{
+    private readonly HttpClient _http;
+    private readonly string _model;
+    private readonly JsonSerializerOptions _jsonOptions;
+
+    public QwenVisionClient(HttpClient http, IConfiguration config)
+    {
+        _http = http;
+        _model = config["QWEN_VISION_MODEL"] ?? "qwen-vl-max";
+        _jsonOptions = new()
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    public async Task<ChatCompletionResponse> VisionAsync(
+        string systemPrompt,
+        List<string> imageUrls,
+        string? userText = null,
+        int maxTokens = 2048,
+        CancellationToken ct = default)
+    {
+        var messages = new List<ChatMessage>();
+        if (!string.IsNullOrEmpty(systemPrompt))
+            messages.Add(new ChatMessage { Role = "system", Content = systemPrompt });
+
+        var contentParts = new List<object>();
+        foreach (var url in imageUrls)
+            contentParts.Add(new { type = "image_url", image_url = new { url } });
+        if (!string.IsNullOrEmpty(userText))
+            contentParts.Add(new { type = "text", text = userText });
+
+        var userMessage = new ChatMessage
+        {
+            Role = "user",
+            Content = JsonSerializer.Serialize(contentParts, _jsonOptions)
+        };
+        messages.Add(userMessage);
+
+        var request = new ChatCompletionRequest
+        {
+            Model = _model, Messages = messages, MaxTokens = maxTokens, Stream = false,
+        };
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+        var response = await _http.PostAsync("chat/completions", content, ct);
+        response.EnsureSuccessStatusCode();
+        var body = await response.Content.ReadAsStringAsync(ct);
+        return JsonSerializer.Deserialize<ChatCompletionResponse>(body, _jsonOptions)!;
+    }
+}

backend/src/Health.Infrastructure/AI/OpenAiCompatibleClient.cs

@@ -0,0 +1,235 @@
+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+
+namespace Health.Infrastructure.AI;
+
+/// <summary>
+/// OpenAI 兼容协议 HTTP 客户端，统一调用 DeepSeek / 千问 VL
+/// </summary>
+public sealed class OpenAiCompatibleClient
+{
+    private readonly HttpClient _http;
+    private readonly string _model;
+    private readonly JsonSerializerOptions _jsonOptions;
+
+    public OpenAiCompatibleClient(string baseUrl, string apiKey, string model)
+    {
+        _http = new HttpClient
+        {
+            BaseAddress = new Uri(baseUrl.TrimEnd('/') + "/"),
+            Timeout = TimeSpan.FromSeconds(60)
+        };
+        _http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);
+        _http.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+        _model = model;
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    /// <summary>
+    /// 流式 Chat Completions（SSE）
+    /// </summary>
+    public async IAsyncEnumerable<string> ChatStreamAsync(
+        List<ChatMessage> messages,
+        List<ToolDefinition>? tools = null,
+        int maxTokens = 2048,
+        float temperature = 0.7f)
+    {
+        var request = new ChatCompletionRequest
+        {
+            Model = _model,
+            Messages = messages,
+            Stream = true,
+            MaxTokens = maxTokens,
+            Temperature = temperature,
+            Tools = tools,
+        };
+
+        if (tools?.Count > 0)
+            request.ToolChoice = "auto";
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+        var httpRequest = new HttpRequestMessage(HttpMethod.Post, "chat/completions")
+        {
+            Content = content
+        };
+        httpRequest.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/event-stream"));
+
+        var response = await _http.SendAsync(httpRequest, HttpCompletionOption.ResponseHeadersRead);
+        response.EnsureSuccessStatusCode();
+
+        using var stream = await response.Content.ReadAsStreamAsync();
+        using var reader = new StreamReader(stream);
+
+        string? line;
+        while ((line = await reader.ReadLineAsync()) != null)
+        {
+            if (string.IsNullOrWhiteSpace(line)) continue;
+            if (!line.StartsWith("data: ")) continue;
+
+            var data = line["data: ".Length..];
+            if (data == "[DONE]") break;
+
+            yield return data;
+        }
+    }
+
+    /// <summary>
+    /// 非流式 Chat Completions
+    /// </summary>
+    public async Task<ChatCompletionResponse> ChatAsync(
+        List<ChatMessage> messages,
+        List<ToolDefinition>? tools = null,
+        int maxTokens = 2048,
+        float temperature = 0.7f)
+    {
+        var request = new ChatCompletionRequest
+        {
+            Model = _model,
+            Messages = messages,
+            Stream = false,
+            MaxTokens = maxTokens,
+            Temperature = temperature,
+            Tools = tools,
+        };
+
+        if (tools?.Count > 0)
+            request.ToolChoice = "auto";
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+        var response = await _http.PostAsync("chat/completions", content);
+        response.EnsureSuccessStatusCode();
+
+        var body = await response.Content.ReadAsStringAsync();
+        return JsonSerializer.Deserialize<ChatCompletionResponse>(body, _jsonOptions)!;
+    }
+
+    /// <summary>
+    /// Vision 图片理解（非流式）
+    /// </summary>
+    public async Task<ChatCompletionResponse> VisionAsync(
+        string systemPrompt,
+        List<string> imageUrls,
+        string? userText = null,
+        int maxTokens = 2048)
+    {
+        var messages = new List<ChatMessage>();
+
+        if (!string.IsNullOrEmpty(systemPrompt))
+            messages.Add(new ChatMessage { Role = "system", Content = systemPrompt });
+
+        // 构建多模态消息内容
+        var contentParts = new List<object>();
+        foreach (var url in imageUrls)
+            contentParts.Add(new { type = "image_url", image_url = new { url } });
+        if (!string.IsNullOrEmpty(userText))
+            contentParts.Add(new { type = "text", text = userText });
+
+        var userMessage = new ChatMessage
+        {
+            Role = "user",
+            Content = JsonSerializer.Serialize(contentParts, _jsonOptions)
+        };
+
+        messages.Add(userMessage);
+
+        var request = new ChatCompletionRequest
+        {
+            Model = _model,
+            Messages = messages,
+            MaxTokens = maxTokens,
+            Stream = false,
+        };
+
+        var json = JsonSerializer.Serialize(request, _jsonOptions);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+        var response = await _http.PostAsync("chat/completions", content);
+        response.EnsureSuccessStatusCode();
+        var body = await response.Content.ReadAsStringAsync();
+        return JsonSerializer.Deserialize<ChatCompletionResponse>(body, _jsonOptions)!;
+    }
+}
+
+#region 请求/响应模型
+
+public sealed class ChatCompletionRequest
+{
+    public string Model { get; set; } = string.Empty;
+    public List<ChatMessage> Messages { get; set; } = [];
+    public bool Stream { get; set; }
+    public int MaxTokens { get; set; } = 2048;
+    public float Temperature { get; set; } = 0.7f;
+    public List<ToolDefinition>? Tools { get; set; }
+    public string? ToolChoice { get; set; }
+}
+
+public sealed class ChatMessage
+{
+    public string Role { get; set; } = string.Empty;
+    public string Content { get; set; } = string.Empty;
+    public string? ToolCallId { get; set; }
+    public List<ToolCall>? ToolCalls { get; set; }
+}
+
+public sealed class ToolDefinition
+{
+    public string Type { get; set; } = "function";
+    public ToolFunction Function { get; set; } = new();
+}
+
+public sealed class ToolFunction
+{
+    public string Name { get; set; } = string.Empty;
+    public string Description { get; set; } = string.Empty;
+    public object Parameters { get; set; } = new();
+}
+
+public sealed class ToolCall
+{
+    public string Id { get; set; } = string.Empty;
+    public string Type { get; set; } = "function";
+    public ToolCallFunction Function { get; set; } = new();
+}
+
+public sealed class ToolCallFunction
+{
+    public string Name { get; set; } = string.Empty;
+    public string Arguments { get; set; } = string.Empty;
+}
+
+public sealed class ChatCompletionResponse
+{
+    public string Id { get; set; } = string.Empty;
+    public List<Choice> Choices { get; set; } = [];
+}
+
+public sealed class Choice
+{
+    public int Index { get; set; }
+    public ResponseMessage? Message { get; set; }
+    public ResponseDelta? Delta { get; set; }
+    public string? FinishReason { get; set; }
+}
+
+public sealed class ResponseMessage
+{
+    public string Role { get; set; } = string.Empty;
+    public string? Content { get; set; }
+    public List<ToolCall>? ToolCalls { get; set; }
+}
+
+public sealed class ResponseDelta
+{
+    public string? Content { get; set; }
+    public string? Role { get; set; }
+}
+
+#endregion

backend/src/Health.Infrastructure/AI/PromptManager.cs

@@ -0,0 +1,116 @@
+using Health.Domain.Enums;
+
+namespace Health.Infrastructure.AI;
+
+/// <summary>
+/// System Prompt 模板管理
+/// </summary>
+public sealed class PromptManager
+{
+    /// <summary>
+    /// 获取指定 Agent 的 System Prompt
+    /// </summary>
+    public string GetSystemPrompt(AgentType agentType) => agentType switch
+    {
+        AgentType.Default => DefaultPrompt,
+        AgentType.Consultation => ConsultationPrompt,
+        AgentType.Health => HealthDataPrompt,
+        AgentType.Diet => DietPrompt,
+        AgentType.Medication => MedicationPrompt,
+        AgentType.Report => ReportPrompt,
+        AgentType.Exercise => ExercisePrompt,
+        _ => DefaultPrompt
+    };
+
+    private const string DefaultPrompt = """
+        你是一个心脏术后康复患者的私人 AI 健康管家，名叫"阿福"。
+        语气温暖、专业、像朋友一样关怀患者。
+
+        职责：
+        1. 理解用户的健康需求，解析健康数据
+        2. 主动查看患者近期数据，发现异常时提醒
+        3. 回答健康知识问题
+        4. 每次回复末尾，如有需要提醒的事项，简短温馨地提醒一句
+
+        规则：
+        - 不要提供超出你能力范围的医疗建议
+        - 遇到紧急症状（剧烈胸痛、呼吸困难）立即建议就医
+        - 饮食/运动建议要结合患者档案中的疾病和限制
+        """;
+
+    private const string ConsultationPrompt = """
+        你是一个心血管内科医生助手，负责对心脏术后患者进行多轮问诊。
+
+        规则：
+        1. 每次只问一个问题，不要一次问多个
+        2. 给出 2-3 个快捷选项让患者点击
+        3. 问诊步骤：先问感受 → 持续时间 → 伴随症状 → 近期用药 → 给出初步分析
+        4. 遇到以下情况建议立即就医：剧烈胸痛、呼吸困难、心悸
+        5. 遇到以下情况建议转医生：血压持续>160/100、心率>120或<50
+        6. 所有分析末尾标注"以上为AI分析，具体请咨询医生"
+        7. 问诊结束给出结构化小结
+        """;
+
+    private const string HealthDataPrompt = """
+        你是一个健康数据录入助手。
+
+        规则：
+        1. 解析用户消息中的指标和数值（血压/心率/血糖/血氧/体重）
+        2. 指标明确+数值明确→直接录入
+        3. 数值明确但指标模糊（如只说"120"）→追问是"收缩压还是血糖？"
+        4. 时间模糊→取当前时间，在确认卡片中告知用户
+        5. 数值超出正常范围→附带异常提醒
+        6. 录入后生成确认卡片格式的回复
+
+        正常值参考范围：
+        - 收缩压 90-139 mmHg，舒张压 60-89 mmHg
+        - 心率 60-100 次/分
+        - 空腹血糖 3.9-6.1 mmol/L
+        - 血氧 95-100%
+        """;
+
+    private const string DietPrompt = """
+        你是一个营养分析专家，专门为心脏术后患者提供饮食指导。
+
+        规则：
+        1. 收到VLM食物识别结果后，结合患者档案进行综合分析
+        2. 总热量汇总
+        3. 逐项判断"能不能吃"（基于疾病诊断/过敏/饮食限制/近期指标）
+        4. 给出 1-5 星健康评分
+        5. 单项警告 + 整体饮食建议
+        6. 追问餐次归属（早餐/午餐/晚餐/加餐）
+        """;
+
+    private const string MedicationPrompt = """
+        你是一个用药管理专家。
+
+        规则：
+        1. 解析用户口中的药品信息（药名/剂量/频次/时间）
+        2. "早饭后"等模糊时间→追问具体几点
+        3. 解析完成后展示确认卡片
+        4. 处方拍照→提取药品信息→生成用药计划→让用户确认
+        5. 回答用药相关疑问
+        """;
+
+    private const string ReportPrompt = """
+        你是一个医学报告解读专家。
+
+        规则：
+        1. 收到报告图片后，提取所有指标及其数值
+        2. 标注异常指标（偏高/偏低/正常）
+        3. 给出初步分析
+        4. 所有内容标注"AI预解读，待医生确认"
+        5. 图像类报告（彩超/CT）注明"需医生人工审阅"
+        """;
+
+    private const string ExercisePrompt = """
+        你是一个运动康复教练，专门为心脏术后患者制定运动计划。
+
+        规则：
+        1. 帮助用户设定每周运动计划（类型/时长/天数）
+        2. 以周为单位，每天指定运动类型和时长
+        3. 推荐适合心脏康复的运动：散步、慢跑、太极、游泳等
+        4. 运动强度要循序渐进
+        5. 避免剧烈运动
+        """;
+}

backend/src/Health.Infrastructure/Data/AppDbContext.cs

@@ -0,0 +1,136 @@
+using Health.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace Health.Infrastructure.Data;
+
+/// <summary>
+/// 应用程序数据库上下文
+/// </summary>
+public sealed class AppDbContext : DbContext
+{
+    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
+
+    // 核心业务表
+    public DbSet<User> Users => Set<User>();
+    public DbSet<HealthRecord> HealthRecords => Set<HealthRecord>();
+    public DbSet<Medication> Medications => Set<Medication>();
+    public DbSet<MedicationLog> MedicationLogs => Set<MedicationLog>();
+    public DbSet<DietRecord> DietRecords => Set<DietRecord>();
+    public DbSet<DietFoodItem> DietFoodItems => Set<DietFoodItem>();
+    public DbSet<ExercisePlan> ExercisePlans => Set<ExercisePlan>();
+    public DbSet<ExercisePlanItem> ExercisePlanItems => Set<ExercisePlanItem>();
+    public DbSet<Report> Reports => Set<Report>();
+    public DbSet<Conversation> Conversations => Set<Conversation>();
+    public DbSet<ConversationMessage> ConversationMessages => Set<ConversationMessage>();
+    public DbSet<Consultation> Consultations => Set<Consultation>();
+    public DbSet<ConsultationMessage> ConsultationMessages => Set<ConsultationMessage>();
+    public DbSet<Doctor> Doctors => Set<Doctor>();
+    public DbSet<FollowUp> FollowUps => Set<FollowUp>();
+    public DbSet<HealthArchive> HealthArchives => Set<HealthArchive>();
+
+    // 支撑表
+    public DbSet<RefreshToken> RefreshTokens => Set<RefreshToken>();
+    public DbSet<VerificationCode> VerificationCodes => Set<VerificationCode>();
+    public DbSet<NotificationPreference> NotificationPreferences => Set<NotificationPreference>();
+    public DbSet<DeviceToken> DeviceTokens => Set<DeviceToken>();
+
+    protected override void OnModelCreating(ModelBuilder builder)
+    {
+        base.OnModelCreating(builder);
+
+        // ---- User ----
+        builder.Entity<User>(e =>
+        {
+            e.HasIndex(u => u.Phone).IsUnique();
+        });
+
+        // ---- HealthRecord ----
+        builder.Entity<HealthRecord>(e =>
+        {
+            e.HasIndex(r => new { r.UserId, r.RecordedAt }).IsDescending(false, true);
+            e.HasIndex(r => new { r.UserId, r.MetricType });
+            e.Property(r => r.MetricType).HasConversion<string>();
+            e.Property(r => r.Source).HasConversion<string>();
+        });
+
+        // ---- Medication ----
+        builder.Entity<Medication>(e =>
+        {
+            e.HasIndex(m => new { m.UserId, m.IsActive });
+            e.Property(m => m.Frequency).HasConversion<string>();
+            e.Property(m => m.Source).HasConversion<string>();
+            e.Property(m => m.TimeOfDay).HasColumnType("time[]");
+        });
+
+        builder.Entity<MedicationLog>(e =>
+        {
+            e.HasIndex(l => new { l.MedicationId, l.CreatedAt }).IsDescending(false, true);
+            e.Property(l => l.Status).HasConversion<string>();
+        });
+
+        // ---- Diet ----
+        builder.Entity<DietRecord>(e =>
+        {
+            e.HasIndex(d => new { d.UserId, d.RecordedAt }).IsDescending(false, true);
+            e.Property(d => d.MealType).HasConversion<string>();
+        });
+
+        // ---- ExercisePlan ----
+        builder.Entity<ExercisePlan>(e =>
+        {
+            e.HasIndex(p => new { p.UserId, p.WeekStartDate }).IsDescending(false, true);
+        });
+
+        // ---- Report ----
+        builder.Entity<Report>(e =>
+        {
+            e.Property(r => r.FileType).HasConversion<string>();
+            e.Property(r => r.Category).HasConversion<string>();
+            e.Property(r => r.Status).HasConversion<string>();
+        });
+
+        // ---- Conversation ----
+        builder.Entity<Conversation>(e =>
+        {
+            e.HasIndex(c => new { c.UserId, c.UpdatedAt }).IsDescending(false, true);
+            e.Property(c => c.AgentType).HasConversion<string>();
+        });
+
+        builder.Entity<ConversationMessage>(e =>
+        {
+            e.HasIndex(m => new { m.ConversationId, m.CreatedAt });
+            e.Property(m => m.Role).HasConversion<string>();
+        });
+
+        // ---- Consultation ----
+        builder.Entity<Consultation>(e =>
+        {
+            e.Property(c => c.Status).HasConversion<string>();
+        });
+
+        builder.Entity<ConsultationMessage>(e =>
+        {
+            e.HasIndex(m => new { m.ConsultationId, m.CreatedAt }).IsDescending(false, true);
+            e.Property(m => m.SenderType).HasConversion<string>();
+        });
+
+        // ---- VerificationCode ----
+        builder.Entity<VerificationCode>(e =>
+        {
+            e.HasIndex(v => new { v.Phone, v.CreatedAt }).IsDescending(false, true);
+        });
+
+        // ---- NotificationPreference ----
+        builder.Entity<NotificationPreference>(e =>
+        {
+            e.HasIndex(n => n.UserId).IsUnique();
+        });
+
+        // ---- HealthArchive ----
+        builder.Entity<HealthArchive>(e =>
+        {
+            e.HasIndex(a => a.UserId).IsUnique();
+        });
+    }
+}

backend/src/Health.Infrastructure/Data/DataSeeder.cs

@@ -0,0 +1,47 @@
+using Health.Domain.Entities;
+
+namespace Health.Infrastructure.Data;
+
+/// <summary>
+/// 数据库种子数据
+/// </summary>
+public static class DataSeeder
+{
+    public static async Task SeedAsync(AppDbContext db)
+    {
+        // 种子医生数据
+        if (!db.Doctors.Any())
+        {
+            db.Doctors.AddRange(
+                new Doctor
+                {
+                    Id = Guid.NewGuid(),
+                    Name = "王建国",
+                    Title = "主任医师",
+                    Department = "心血管内科",
+                    Introduction = "擅长冠心病术后管理、心脏康复指导",
+                    IsActive = true
+                },
+                new Doctor
+                {
+                    Id = Guid.NewGuid(),
+                    Name = "李芳",
+                    Title = "副主任医师",
+                    Department = "营养科",
+                    Introduction = "擅长术后营养指导、膳食规划",
+                    IsActive = true
+                },
+                new Doctor
+                {
+                    Id = Guid.NewGuid(),
+                    Name = "张明",
+                    Title = "主任医师",
+                    Department = "心脏康复科",
+                    Introduction = "擅长心脏术后运动康复、心肺功能评估",
+                    IsActive = true
+                }
+            );
+            await db.SaveChangesAsync();
+        }
+    }
+}

backend/src/Health.Infrastructure/Data/DevDataSeeder.cs

@@ -0,0 +1,144 @@
+using Health.Domain.Entities;
+using Health.Domain.Enums;
+using Microsoft.Extensions.Configuration;
+
+namespace Health.Infrastructure.Data;
+
+/// <summary>
+/// 开发环境测试数据填充。生产环境不要调用！
+/// 开关：DEVDATA_ENABLED=true 才会执行
+/// </summary>
+public static class DevDataSeeder
+{
+    public static async Task SeedIfEnabled(AppDbContext db, IConfiguration config)
+    {
+        // 通过环境变量控制：DEVDATA_ENABLED=true 才填充测试数据
+        var enabled = config["DEVDATA_ENABLED"]?.ToLowerInvariant();
+        if (enabled != "true") return;
+
+        // 检查是否已有测试用户（避免重复填充）
+        if (db.Users.Any(u => u.Phone == "13800000001")) return;
+
+        // ---- 创建测试患者 ----
+        var user = new User
+        {
+            Id = Guid.NewGuid(), Phone = "13800000001", Name = "张三",
+            Gender = "男", BirthDate = new DateOnly(1970, 3, 15),
+            CreatedAt = DateTime.UtcNow, UpdatedAt = DateTime.UtcNow,
+        };
+        db.Users.Add(user);
+        await db.SaveChangesAsync();
+
+        // ---- 健康档案 ----
+        db.HealthArchives.Add(new HealthArchive
+        {
+            Id = Guid.NewGuid(), UserId = user.Id,
+            Diagnosis = "冠心病", SurgeryType = "PCI支架植入术",
+            SurgeryDate = new DateOnly(2026, 3, 15),
+            Allergies = ["青霉素"], DietRestrictions = ["低盐", "低脂"],
+            ChronicDiseases = ["高血压", "高血脂"],
+            FamilyHistory = "父亲冠心病",
+            UpdatedAt = DateTime.UtcNow,
+        });
+
+        // ---- 健康数据（过去 7 天）----
+        var random = new Random(42);
+        for (int i = 7; i >= 0; i--)
+        {
+            var date = DateTime.UtcNow.AddDays(-i);
+            // 血压
+            db.HealthRecords.Add(new HealthRecord
+            {
+                Id = Guid.NewGuid(), UserId = user.Id, MetricType = HealthMetricType.BloodPressure,
+                Systolic = 120 + random.Next(-5, 15), Diastolic = 75 + random.Next(-5, 10),
+                Unit = "mmHg", Source = HealthRecordSource.AiEntry,
+                IsAbnormal = false, RecordedAt = date,
+            });
+            // 心率
+            db.HealthRecords.Add(new HealthRecord
+            {
+                Id = Guid.NewGuid(), UserId = user.Id, MetricType = HealthMetricType.HeartRate,
+                Value = 68 + random.Next(-5, 10), Unit = "次/分",
+                Source = HealthRecordSource.AiEntry,
+                IsAbnormal = false, RecordedAt = date,
+            });
+            // 血糖
+            db.HealthRecords.Add(new HealthRecord
+            {
+                Id = Guid.NewGuid(), UserId = user.Id, MetricType = HealthMetricType.Glucose,
+                Value = 5.0m + (decimal)(random.NextDouble() * 1.5),
+                Unit = "mmol/L", Source = HealthRecordSource.AiEntry,
+                IsAbnormal = false, RecordedAt = date,
+            });
+            // 血氧
+            db.HealthRecords.Add(new HealthRecord
+            {
+                Id = Guid.NewGuid(), UserId = user.Id, MetricType = HealthMetricType.SpO2,
+                Value = 96 + random.Next(0, 3), Unit = "%",
+                Source = HealthRecordSource.AiEntry,
+                IsAbnormal = false, RecordedAt = date,
+            });
+        }
+        // 一条异常血压
+        db.HealthRecords.Add(new HealthRecord
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, MetricType = HealthMetricType.BloodPressure,
+            Systolic = 148, Diastolic = 92, Unit = "mmHg",
+            Source = HealthRecordSource.AiEntry, IsAbnormal = true,
+            RecordedAt = DateTime.UtcNow.AddDays(-1),
+        });
+
+        // ---- 用药计划 ----
+        db.Medications.Add(new Medication
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, Name = "阿司匹林", Dosage = "100mg",
+            Frequency = MedicationFrequency.Daily, TimeOfDay = [new TimeOnly(8, 0)],
+            Source = MedicationSource.Prescription, IsActive = true, StartDate = new DateOnly(2026, 4, 1),
+        });
+        db.Medications.Add(new Medication
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, Name = "阿托伐他汀", Dosage = "20mg",
+            Frequency = MedicationFrequency.Daily, TimeOfDay = [new TimeOnly(20, 0)],
+            Source = MedicationSource.Prescription, IsActive = true, StartDate = new DateOnly(2026, 4, 1),
+        });
+
+        // ---- 运动计划 ----
+        var monday = DateOnly.FromDateTime(DateTime.Now.AddDays(-(int)DateTime.Now.DayOfWeek + 1));
+        var plan = new ExercisePlan { Id = Guid.NewGuid(), UserId = user.Id, WeekStartDate = monday };
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 0, ExerciseType = "散步", DurationMinutes = 30, IsCompleted = true, CompletedAt = DateTime.UtcNow.AddDays(-1) });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 1, ExerciseType = "慢跑", DurationMinutes = 20 });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 2, ExerciseType = "散步", DurationMinutes = 30 });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 3, IsRestDay = true });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 4, ExerciseType = "太极", DurationMinutes = 40 });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 5, IsRestDay = true });
+        plan.Items.Add(new ExercisePlanItem { Id = Guid.NewGuid(), DayOfWeek = 6, ExerciseType = "散步", DurationMinutes = 30 });
+        db.ExercisePlans.Add(plan);
+
+        // ---- 饮食记录 ----
+        var lunch = new DietRecord
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, MealType = MealType.Lunch,
+            TotalCalories = 644, HealthScore = 3, RecordedAt = DateOnly.FromDateTime(DateTime.Now),
+        };
+        lunch.FoodItems.Add(new DietFoodItem { Id = Guid.NewGuid(), Name = "米饭", Portion = "约1碗", Calories = 174, SortOrder = 1 });
+        lunch.FoodItems.Add(new DietFoodItem { Id = Guid.NewGuid(), Name = "红烧肉", Portion = "约5块", Calories = 470, Warning = "脂肪含量偏高", SortOrder = 2 });
+        db.DietRecords.Add(lunch);
+
+        // ---- 复查计划 ----
+        db.FollowUps.Add(new FollowUp
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, Title = "心内科复查",
+            DoctorName = "王建国", Department = "心血管内科",
+            ScheduledAt = DateTime.UtcNow.AddDays(3), Status = FollowUpStatus.Upcoming,
+        });
+        db.FollowUps.Add(new FollowUp
+        {
+            Id = Guid.NewGuid(), UserId = user.Id, Title = "术后3周复查",
+            DoctorName = "王建国", Department = "心血管内科",
+            ScheduledAt = DateTime.UtcNow.AddDays(-14), Status = FollowUpStatus.Completed,
+        });
+
+        await db.SaveChangesAsync();
+        Console.WriteLine($"[DEV] 测试数据已填充：用户 {user.Phone}");
+    }
+}

backend/src/Health.Infrastructure/Health.Infrastructure.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\Health.Domain\Health.Domain.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.8" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.8" />
+    <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.18.0" />
+    <PackageReference Include="Minio" Version="7.0.0" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.18.0" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

backend/src/Health.Infrastructure/Services/JwtProvider.cs

@@ -0,0 +1,80 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Health.Infrastructure.Services;
+
+/// <summary>
+/// JWT Token 生成与验证服务
+/// </summary>
+public sealed class JwtProvider
+{
+    private readonly string _secret;
+    private readonly string _issuer;
+    private readonly string _audience;
+
+    public JwtProvider(IConfiguration configuration)
+    {
+        _secret = configuration["JWT_SECRET"] ?? "dev-secret-key-change-in-production-min-32-chars!!";
+        _issuer = configuration["JWT_ISSUER"] ?? "health-manager";
+        _audience = configuration["JWT_AUDIENCE"] ?? "health-manager-app";
+    }
+
+    /// <summary>
+    /// 生成 access_token（30 分钟有效）
+    /// </summary>
+    public string GenerateAccessToken(Guid userId, string phone)
+    {
+        var claims = new[]
+        {
+            new Claim(ClaimTypes.NameIdentifier, userId.ToString()),
+            new Claim(ClaimTypes.MobilePhone, phone),
+            new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
+        };
+
+        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_secret));
+        var credentials = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+
+        var token = new JwtSecurityToken(
+            issuer: _issuer,
+            audience: _audience,
+            claims: claims,
+            expires: DateTime.UtcNow.AddMinutes(30),
+            signingCredentials: credentials
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+
+    /// <summary>
+    /// 生成 refresh_token（30 天有效）
+    /// </summary>
+    public string GenerateRefreshToken()
+    {
+        var randomBytes = new byte[64];
+        using var rng = RandomNumberGenerator.Create();
+        rng.GetBytes(randomBytes);
+        return Convert.ToBase64String(randomBytes);
+    }
+
+    /// <summary>
+    /// 验证 JWT token 并返回 ClaimsPrincipal
+    /// </summary>
+    public TokenValidationParameters GetValidationParameters()
+    {
+        return new TokenValidationParameters
+        {
+            ValidateIssuer = true,
+            ValidateAudience = true,
+            ValidateLifetime = true,
+            ValidateIssuerSigningKey = true,
+            ValidIssuer = _issuer,
+            ValidAudience = _audience,
+            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_secret)),
+            ClockSkew = TimeSpan.Zero
+        };
+    }
+}

backend/src/Health.Infrastructure/Services/SmsService.cs

@@ -0,0 +1,26 @@
+namespace Health.Infrastructure.Services;
+
+/// <summary>
+/// 短信验证码服务（开发阶段直接返回成功）
+/// </summary>
+public sealed class SmsService
+{
+    /// <summary>
+    /// 发送验证码（开发阶段不做真实发送）
+    /// </summary>
+    public Task<bool> SendCodeAsync(string phone, string code)
+    {
+        // 开发阶段：直接在控制台输出，不做真实发送
+        Console.WriteLine($"[SMS DEV] 发送验证码到 {phone}: {code}");
+        return Task.FromResult(true);
+    }
+
+    /// <summary>
+    /// 生成 6 位随机数字验证码
+    /// </summary>
+    public string GenerateCode()
+    {
+        // Next(min, max) 的 max 是 exclusive 的，所以用 1000000 保证 6 位
+        return Random.Shared.Next(100000, 1000000).ToString();
+    }
+}