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.WebApi/Program.cs

@@ -0,0 +1,124 @@
+using System.Text;
+using Health.Infrastructure.AI;
+using Health.Infrastructure.Data;
+using Health.Infrastructure.Services;
+using Health.WebApi.BackgroundServices;
+using Health.WebApi.Endpoints;
+using Health.WebApi.Middleware;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.IdentityModel.Tokens;
+
+// 加载 .env 文件（开发环境）
+var envPath = Path.Combine(Directory.GetCurrentDirectory(), "..", "..", ".env");
+if (File.Exists(envPath))
+{
+    foreach (var line in File.ReadAllLines(envPath))
+    {
+        var trimmed = line.Trim();
+        if (string.IsNullOrEmpty(trimmed) || trimmed.StartsWith('#')) continue;
+        var eqIdx = trimmed.IndexOf('=');
+        if (eqIdx <= 0) continue;
+        var key = trimmed[..eqIdx].Trim();
+        var value = trimmed[(eqIdx + 1)..].Trim();
+        Environment.SetEnvironmentVariable(key, value);
+    }
+}
+
+var builder = WebApplication.CreateBuilder(args);
+
+// ---- 数据库 ----
+builder.Services.AddDbContext<AppDbContext>(options =>
+    options.UseNpgsql(builder.Configuration.GetConnectionString("Default") ?? builder.Configuration["DB_CONNECTION"] ?? "Host=localhost;Database=health_manager;Username=postgres;Password=postgres"));
+
+// ---- JWT 认证 ----
+var jwtSecret = builder.Configuration["JWT_SECRET"];
+if (string.IsNullOrEmpty(jwtSecret) && !builder.Environment.IsDevelopment())
+    throw new InvalidOperationException("JWT_SECRET 环境变量未配置，生产环境必须设置");
+jwtSecret ??= "dev-secret-key-change-in-production-min-32-chars!!";
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+    .AddJwtBearer(options =>
+    {
+        options.TokenValidationParameters = new TokenValidationParameters
+        {
+            ValidateIssuer = true,
+            ValidateAudience = true,
+            ValidateLifetime = true,
+            ValidateIssuerSigningKey = true,
+            ValidIssuer = builder.Configuration["JWT_ISSUER"] ?? "health-manager",
+            ValidAudience = builder.Configuration["JWT_AUDIENCE"] ?? "health-manager-app",
+            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSecret)),
+            ClockSkew = TimeSpan.Zero
+        };
+    });
+builder.Services.AddAuthorization();
+
+// ---- 业务服务 ----
+builder.Services.AddSingleton<JwtProvider>();
+builder.Services.AddSingleton<SmsService>();
+builder.Services.AddSingleton<PromptManager>();
+
+// ---- AI 客户端（使用 IHttpClientFactory 区分 LLM 和 VLM）----
+builder.Services.AddHttpClient<DeepSeekClient>(client =>
+{
+    client.BaseAddress = new Uri((builder.Configuration["DEEPSEEK_BASE_URL"] ?? "https://api.deepseek.com/v1").TrimEnd('/') + "/");
+    client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", builder.Configuration["DEEPSEEK_API_KEY"] ?? "");
+    client.Timeout = TimeSpan.FromSeconds(60);
+});
+builder.Services.AddHttpClient<QwenVisionClient>(client =>
+{
+    client.BaseAddress = new Uri((builder.Configuration["QWEN_BASE_URL"] ?? "https://dashscope.aliyuncs.com/compatible-mode/v1").TrimEnd('/') + "/");
+    client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", builder.Configuration["QWEN_API_KEY"] ?? "");
+    client.Timeout = TimeSpan.FromSeconds(60);
+});
+
+// ---- 后台服务 ----
+builder.Services.AddHostedService<MedicationReminderService>();
+builder.Services.AddHostedService<CleanupService>();
+
+// ---- OpenAPI ----
+builder.Services.AddOpenApi();
+
+// ---- CORS ----
+builder.Services.AddCors(options =>
+{
+    options.AddDefaultPolicy(policy =>
+    {
+        policy.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader();
+    });
+    // 生产环境：policy.WithOrigins("https://yourdomain.com").AllowAnyMethod().AllowAnyHeader();
+});
+
+var app = builder.Build();
+
+// ---- 中间件管道（ExceptionMiddleware 放最前面）----
+app.UseMiddleware<ExceptionMiddleware>();
+app.UseCors();
+app.UseAuthentication();
+app.UseAuthorization();
+
+if (app.Environment.IsDevelopment())
+    app.MapOpenApi();
+
+// ---- 初始化数据库（开发环境：每次重建）----
+using (var scope = app.Services.CreateScope())
+{
+    var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+    await db.Database.EnsureCreatedAsync();
+    await DataSeeder.SeedAsync(db);
+    await DevDataSeeder.SeedIfEnabled(db, app.Configuration);
+}
+
+// ---- 注册 API 端点 ----
+app.MapAuthEndpoints();
+app.MapHealthEndpoints();
+app.MapDietEndpoints();
+app.MapMedicationEndpoints();
+app.MapReportEndpoints();
+app.MapConsultationEndpoints();
+app.MapExerciseEndpoints();
+app.MapUserEndpoints();
+app.MapAiChatEndpoints();
+app.MapFileEndpoints();
+
+app.Run();