feat: 重构数据库迁移架构，支持多数据库提供程序 (SQLite/SQLServer/PostgreSQL/MySQL)

- 将迁移文件按数据库类型分目录存放 (Migrations/SQLite, MySQL, PostgreSQL, SqlServer)
- 新增各数据库提供程序的 DesignTimeDbContextFactory，支持 --provider 参数切换
- 新增 ProviderAppDataContexts，定义各数据库对应的 AppDataContext 子类
- DatabaseExtensions 增加 AddProviderAppDataContext 方法，按配置自动注册对应 DbContext
- 修正 MySQL 提供程序调用方式 (UseMySql -> UseMySQL)
- UserEntity 模型增加新字段
- 更新 add-migration.ps1

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-ef": {
-      "version": "10.0.0",
+      "version": "10.0.7",
       "commands": [
         "dotnet-ef"
       ],

Avalonia-API/Avalonia-API.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.5" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.0">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.7">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

Avalonia-API/appsettings.json

@@ -14,8 +14,8 @@
     "RefreshTokenDays": 30
   },
   "DatabaseConfiguration": {
-    "Provider": "SQLite",
-    "ConnectionString": "Data Source=avalonia-api.db",
+    "Provider": "MySQL",
+    "ConnectionString": "Server=127.0.0.1;Port=3306;Database=avalonia-api;Uid=root;Pwd=123456;Max Pool Size=100;Min Pool Size=5;AllowZeroDateTime=True;AllowLoadLocalInfile=true;SslMode=Required",
     "AutoMigrate": true,
     "RecreateDatabase": false,
     "EnableDetailedLog": false,

Avalonia-EFCore/Avalonia-EFCore.csproj

@@ -8,17 +8,17 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.7" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.0" />
-    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="9.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.0">
+    <PackageReference Include="MySql.EntityFrameworkCore" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.7">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.7" />
   </ItemGroup>
 
   <ItemGroup>

Avalonia-EFCore/Database/AppDataContextFactory.cs

@@ -13,9 +13,92 @@ namespace Avalonia_EFCore.Database
         /// <param name="args">命令行参数。</param>
         /// <returns>配置好的数据上下文实例。</returns>
         public AppDataContext CreateDbContext(string[] args)
+        {
+            return new AppDataContext(DesignTimeDatabaseConfiguration.Create(args));
+        }
+    }
+
+    /// <summary>
+    /// SQLite 迁移设计时工厂。
+    /// </summary>
+    public sealed class SqliteAppDataContextFactory : IDesignTimeDbContextFactory<SqliteAppDataContext>
+    {
+        /// <inheritdoc />
+        public SqliteAppDataContext CreateDbContext(string[] args)
+            => new(DesignTimeDatabaseConfiguration.Create(args, DatabaseProvider.SQLite));
+    }
+
+    /// <summary>
+    /// SQL Server 迁移设计时工厂。
+    /// </summary>
+    public sealed class SqlServerAppDataContextFactory : IDesignTimeDbContextFactory<SqlServerAppDataContext>
+    {
+        /// <inheritdoc />
+        public SqlServerAppDataContext CreateDbContext(string[] args)
+            => new(DesignTimeDatabaseConfiguration.Create(args, DatabaseProvider.SqlServer));
+    }
+
+    /// <summary>
+    /// PostgreSQL 迁移设计时工厂。
+    /// </summary>
+    public sealed class PostgreSqlAppDataContextFactory : IDesignTimeDbContextFactory<PostgreSqlAppDataContext>
+    {
+        /// <inheritdoc />
+        public PostgreSqlAppDataContext CreateDbContext(string[] args)
+            => new(DesignTimeDatabaseConfiguration.Create(args, DatabaseProvider.PostgreSQL));
+    }
+
+    /// <summary>
+    /// MySQL 迁移设计时工厂。
+    /// </summary>
+    public sealed class MySqlAppDataContextFactory : IDesignTimeDbContextFactory<MySqlAppDataContext>
+    {
+        /// <inheritdoc />
+        public MySqlAppDataContext CreateDbContext(string[] args)
+            => new(DesignTimeDatabaseConfiguration.Create(args, DatabaseProvider.MySQL));
+    }
+
+    internal static class DesignTimeDatabaseConfiguration
+    {
+        public static DatabaseConfiguration Create(string[] args, DatabaseProvider defaultProvider = DatabaseProvider.SQLite)
         {
             DatabaseProviderRegistry.RegisterDefaults();
-            return new AppDataContext(DatabaseConfiguration.ForSQLite("avalonia-api.db"));
+
+            var provider = GetProvider(args) ?? defaultProvider;
+            return provider switch
+            {
+                DatabaseProvider.SQLite => DatabaseConfiguration.ForSQLite("avalonia-api.db"),
+                DatabaseProvider.SqlServer => DatabaseConfiguration.ForSqlServer("(localdb)\\MSSQLLocalDB", "AvaloniaApi"),
+                DatabaseProvider.PostgreSQL => DatabaseConfiguration.ForPostgreSQL("localhost", "avalonia_api", "postgres", "postgres"),
+                DatabaseProvider.MySQL => DatabaseConfiguration.ForMySQL("localhost", "avalonia_api", "root", "root"),
+                _ => DatabaseConfiguration.ForSQLite("avalonia-api.db"),
+            };
+        }
+
+        private static DatabaseProvider? GetProvider(string[] args)
+        {
+            for (var i = 0; i < args.Length; i++)
+            {
+                var arg = args[i];
+                string? value = null;
+
+                if (arg.Equals("--provider", StringComparison.OrdinalIgnoreCase) && i + 1 < args.Length)
+                {
+                    value = args[i + 1];
+                }
+                else if (arg.StartsWith("--provider=", StringComparison.OrdinalIgnoreCase))
+                {
+                    value = arg["--provider=".Length..];
+                }
+
+                if (!string.IsNullOrWhiteSpace(value)
+                    && Enum.TryParse<DatabaseProvider>(value, ignoreCase: true, out var provider))
+                {
+                    return provider;
+                }
+            }
+
+            return null;
         }
     }
 }

Avalonia-EFCore/Database/DatabaseExtensions.cs

@@ -1,3 +1,4 @@
+using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace Avalonia_EFCore.Database
@@ -19,6 +20,14 @@ namespace Avalonia_EFCore.Database
             // 注册配置
             services.AddSingleton(config);
 
+            if (typeof(TContext) == typeof(AppDataContext))
+            {
+                services.AddProviderAppDataContext(config);
+                services.AddScoped<DatabaseManager<TContext>>();
+
+                return services;
+            }
+
             // 注册 DbContext
             services.AddDbContext<TContext>(options =>
             {
@@ -31,6 +40,31 @@ namespace Avalonia_EFCore.Database
             return services;
         }
 
+        private static void AddProviderAppDataContext(this IServiceCollection services, DatabaseConfiguration config)
+        {
+            switch (config.Provider)
+            {
+                case DatabaseProvider.SQLite:
+                    services.AddDbContext<AppDataContext, SqliteAppDataContext>(options =>
+                        AppDbContext.ConfigureProvider(options, config));
+                    break;
+                case DatabaseProvider.SqlServer:
+                    services.AddDbContext<AppDataContext, SqlServerAppDataContext>(options =>
+                        AppDbContext.ConfigureProvider(options, config));
+                    break;
+                case DatabaseProvider.PostgreSQL:
+                    services.AddDbContext<AppDataContext, PostgreSqlAppDataContext>(options =>
+                        AppDbContext.ConfigureProvider(options, config));
+                    break;
+                case DatabaseProvider.MySQL:
+                    services.AddDbContext<AppDataContext, MySqlAppDataContext>(options =>
+                        AppDbContext.ConfigureProvider(options, config));
+                    break;
+                default:
+                    throw new NotSupportedException($"数据库提供程序 {config.Provider} 未注册。");
+            }
+        }
+
         /// <summary>
         /// 初始化数据库（在应用启动时调用一次）。
         /// </summary>

Avalonia-EFCore/Database/DatabaseProviderRegistry.cs

@@ -52,7 +52,7 @@ namespace Avalonia_EFCore.Database
                 opts.UseNpgsql(cs, o => { o.CommandTimeout(timeout); o.EnableRetryOnFailure(3); }));
 
             Register(DatabaseProvider.MySQL, (opts, cs, timeout) =>
-                opts.UseMySql(cs, ServerVersion.AutoDetect(cs), o => { o.CommandTimeout(timeout); o.EnableRetryOnFailure(3); }));
+                opts.UseMySQL(cs, o => o.CommandTimeout(timeout)));
         }
     }
 }

Avalonia-EFCore/Database/ProviderAppDataContexts.cs

@@ -0,0 +1,30 @@
+namespace Avalonia_EFCore.Database
+{
+    /// <summary>
+    /// SQLite 专用 DbContext，用于隔离 SQLite 迁移集。
+    /// </summary>
+    public sealed class SqliteAppDataContext(DatabaseConfiguration dbConfig) : AppDataContext(dbConfig)
+    {
+    }
+
+    /// <summary>
+    /// SQL Server 专用 DbContext，用于隔离 SQL Server 迁移集。
+    /// </summary>
+    public sealed class SqlServerAppDataContext(DatabaseConfiguration dbConfig) : AppDataContext(dbConfig)
+    {
+    }
+
+    /// <summary>
+    /// PostgreSQL 专用 DbContext，用于隔离 PostgreSQL 迁移集。
+    /// </summary>
+    public sealed class PostgreSqlAppDataContext(DatabaseConfiguration dbConfig) : AppDataContext(dbConfig)
+    {
+    }
+
+    /// <summary>
+    /// MySQL 专用 DbContext，用于隔离 MySQL 迁移集。
+    /// </summary>
+    public sealed class MySqlAppDataContext(DatabaseConfiguration dbConfig) : AppDataContext(dbConfig)
+    {
+    }
+}

Avalonia-EFCore/Migrations/MySQL/20260520082626_AutoMigration_20260520162543.Designer.cs

@@ -0,0 +1,175 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.MySQL
+{
+    [DbContext(typeof(MySqlAppDataContext))]
+    [Migration("20260520082626_AutoMigration_20260520162543")]
+    partial class AutoMigration_20260520162543
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/MySQL/20260520082626_AutoMigration_20260520162543.cs

@@ -0,0 +1,103 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using MySql.EntityFrameworkCore.Metadata;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.MySQL
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520162543 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterDatabase()
+                .Annotation("MySQL:Charset", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "api-refresh-token",
+                columns: table => new
+                {
+                    id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.IdentityColumn),
+                    userid = table.Column<int>(name: "user-id", type: "int", nullable: false),
+                    tokenhash = table.Column<string>(name: "token-hash", type: "varchar(128)", maxLength: 128, nullable: false),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime(6)", nullable: false),
+                    expiresat = table.Column<DateTime>(name: "expires-at", type: "datetime(6)", nullable: false),
+                    revokedat = table.Column<DateTime>(name: "revoked-at", type: "datetime(6)", nullable: true),
+                    replacedbytokenhash = table.Column<string>(name: "replaced-by-token-hash", type: "varchar(128)", maxLength: 128, nullable: true),
+                    device = table.Column<string>(type: "varchar(200)", maxLength: 200, nullable: true),
+                    ipaddress = table.Column<string>(name: "ip-address", type: "varchar(64)", maxLength: 64, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-api-refresh-token", x => x.id);
+                },
+                comment: "API refresh token")
+                .Annotation("MySQL:Charset", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "user",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "int", nullable: false, comment: "用户主键")
+                        .Annotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.IdentityColumn),
+                    name = table.Column<string>(type: "varchar(100)", maxLength: 100, nullable: true, comment: "用户名称"),
+                    email = table.Column<string>(type: "varchar(200)", maxLength: 200, nullable: true, comment: "用户邮箱"),
+                    phonenumber = table.Column<string>(name: "phone-number", type: "varchar(50)", maxLength: 50, nullable: true, comment: "电话号码"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime(6)", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "datetime(6)", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-user", x => x.id);
+                },
+                comment: "用户实体，演示数据库 CRUD 操作")
+                .Annotation("MySQL:Charset", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "weather-forecast",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "int", nullable: false, comment: "天气预报主键")
+                        .Annotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.IdentityColumn),
+                    date = table.Column<DateOnly>(type: "date", nullable: false, comment: "预报日期"),
+                    temperaturec = table.Column<int>(name: "temperature-c", type: "int", nullable: false, comment: "摄氏温度"),
+                    summary = table.Column<string>(type: "varchar(200)", maxLength: 200, nullable: true, comment: "天气摘要"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime(6)", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "datetime(6)", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-weather-forecast", x => x.id);
+                },
+                comment: "天气预报数据实体")
+                .Annotation("MySQL:Charset", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-hash",
+                table: "api-refresh-token",
+                column: "token-hash",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-user-id",
+                table: "api-refresh-token",
+                column: "user-id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "api-refresh-token");
+
+            migrationBuilder.DropTable(
+                name: "user");
+
+            migrationBuilder.DropTable(
+                name: "weather-forecast");
+        }
+    }
+}

Avalonia-EFCore/Migrations/MySQL/20260520083306_AutoMigration_20260520163216.Designer.cs

@@ -0,0 +1,181 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.MySQL
+{
+    [DbContext(typeof(MySqlAppDataContext))]
+    [Migration("20260520083306_AutoMigration_20260520163216")]
+    partial class AutoMigration_20260520163216
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/MySQL/20260520083306_AutoMigration_20260520163216.cs

@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.MySQL
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520163216 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "password-hash",
+                table: "user",
+                type: "varchar(200)",
+                maxLength: 200,
+                nullable: true,
+                comment: "密码哈希值");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "password-hash",
+                table: "user");
+        }
+    }
+}

Avalonia-EFCore/Migrations/MySQL/MySqlAppDataContextModelSnapshot.cs

@@ -0,0 +1,178 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.MySQL
+{
+    [DbContext(typeof(MySqlAppDataContext))]
+    partial class MySqlAppDataContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("varchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("varchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("varchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/PostgreSQL/20260520082617_AutoMigration_20260520162543.Designer.cs

@@ -0,0 +1,184 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.PostgreSQL
+{
+    [DbContext(typeof(PostgreSqlAppDataContext))]
+    [Migration("20260520082617_AutoMigration_20260520162543")]
+    partial class AutoMigration_20260520162543
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("integer")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/PostgreSQL/20260520082617_AutoMigration_20260520162543.cs

@@ -0,0 +1,97 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.PostgreSQL
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520162543 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "api-refresh-token",
+                columns: table => new
+                {
+                    id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    userid = table.Column<int>(name: "user-id", type: "integer", nullable: false),
+                    tokenhash = table.Column<string>(name: "token-hash", type: "character varying(128)", maxLength: 128, nullable: false),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "timestamp with time zone", nullable: false),
+                    expiresat = table.Column<DateTime>(name: "expires-at", type: "timestamp with time zone", nullable: false),
+                    revokedat = table.Column<DateTime>(name: "revoked-at", type: "timestamp with time zone", nullable: true),
+                    replacedbytokenhash = table.Column<string>(name: "replaced-by-token-hash", type: "character varying(128)", maxLength: 128, nullable: true),
+                    device = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true),
+                    ipaddress = table.Column<string>(name: "ip-address", type: "character varying(64)", maxLength: 64, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-api-refresh-token", x => x.id);
+                },
+                comment: "API refresh token");
+
+            migrationBuilder.CreateTable(
+                name: "user",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "integer", nullable: false, comment: "用户主键")
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    name = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: true, comment: "用户名称"),
+                    email = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true, comment: "用户邮箱"),
+                    phonenumber = table.Column<string>(name: "phone-number", type: "character varying(50)", maxLength: 50, nullable: true, comment: "电话号码"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "timestamp with time zone", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "timestamp with time zone", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-user", x => x.id);
+                },
+                comment: "用户实体，演示数据库 CRUD 操作");
+
+            migrationBuilder.CreateTable(
+                name: "weather-forecast",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "integer", nullable: false, comment: "天气预报主键")
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    date = table.Column<DateOnly>(type: "date", nullable: false, comment: "预报日期"),
+                    temperaturec = table.Column<int>(name: "temperature-c", type: "integer", nullable: false, comment: "摄氏温度"),
+                    summary = table.Column<string>(type: "character varying(200)", maxLength: 200, nullable: true, comment: "天气摘要"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "timestamp with time zone", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "timestamp with time zone", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-weather-forecast", x => x.id);
+                },
+                comment: "天气预报数据实体");
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-hash",
+                table: "api-refresh-token",
+                column: "token-hash",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-user-id",
+                table: "api-refresh-token",
+                column: "user-id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "api-refresh-token");
+
+            migrationBuilder.DropTable(
+                name: "user");
+
+            migrationBuilder.DropTable(
+                name: "weather-forecast");
+        }
+    }
+}

Avalonia-EFCore/Migrations/PostgreSQL/20260520083254_AutoMigration_20260520163216.Designer.cs

@@ -0,0 +1,190 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.PostgreSQL
+{
+    [DbContext(typeof(PostgreSqlAppDataContext))]
+    [Migration("20260520083254_AutoMigration_20260520163216")]
+    partial class AutoMigration_20260520163216
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("integer")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/PostgreSQL/20260520083254_AutoMigration_20260520163216.cs

@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.PostgreSQL
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520163216 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "password-hash",
+                table: "user",
+                type: "character varying(200)",
+                maxLength: 200,
+                nullable: true,
+                comment: "密码哈希值");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "password-hash",
+                table: "user");
+        }
+    }
+}

Avalonia-EFCore/Migrations/PostgreSQL/PostgreSqlAppDataContextModelSnapshot.cs

@@ -0,0 +1,187 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.PostgreSQL
+{
+    [DbContext(typeof(PostgreSqlAppDataContext))]
+    partial class PostgreSqlAppDataContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("integer")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/SQLite/20260514000100_InitialCreate.Designer.cs

@@ -6,9 +6,9 @@ using Microsoft.EntityFrameworkCore.Migrations;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
-    [DbContext(typeof(AppDataContext))]
+    [DbContext(typeof(SqliteAppDataContext))]
     [Migration("20260514000100_InitialCreate")]
     partial class InitialCreate
     {

Avalonia-EFCore/Migrations/SQLite/20260514000100_InitialCreate.cs

@@ -1,11 +1,10 @@
 using System;
-using Microsoft.EntityFrameworkCore.Metadata;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
     /// <summary>
     /// 初始数据库基线。后续软件版本只追加新的 Migration，不修改已发布 Migration。
@@ -21,8 +20,7 @@ namespace Avalonia_EFCore.Migrations
                     Id = table.Column<int>(name: "id", nullable: false, comment: "用户主键")
                         .Annotation("SqlServer:Identity", "1, 1")
                         .Annotation("Sqlite:Autoincrement", true)
-                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn)
-                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     Name = table.Column<string>(name: "name", maxLength: 100, nullable: true, comment: "用户名称"),
                     Email = table.Column<string>(name: "email", maxLength: 200, nullable: true, comment: "用户邮箱"),
                     CreatedAt = table.Column<DateTime>(name: "created-at", nullable: false, comment: "创建时间"),
@@ -41,8 +39,7 @@ namespace Avalonia_EFCore.Migrations
                     Id = table.Column<int>(name: "id", nullable: false, comment: "天气预报主键")
                         .Annotation("SqlServer:Identity", "1, 1")
                         .Annotation("Sqlite:Autoincrement", true)
-                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn)
-                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     Date = table.Column<DateOnly>(name: "date", nullable: false, comment: "预报日期"),
                     TemperatureC = table.Column<int>(name: "temperature-c", nullable: false, comment: "摄氏温度"),
                     Summary = table.Column<string>(name: "summary", maxLength: 200, nullable: true, comment: "天气摘要"),

Avalonia-EFCore/Migrations/SQLite/20260515072045_AutoMigration_20260515152037.Designer.cs

@@ -8,9 +8,9 @@ using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
-    [DbContext(typeof(AppDataContext))]
+    [DbContext(typeof(SqliteAppDataContext))]
     [Migration("20260515072045_AutoMigration_20260515152037")]
     partial class AutoMigration_20260515152037
     {

Avalonia-EFCore/Migrations/SQLite/20260515072045_AutoMigration_20260515152037.cs

@@ -2,7 +2,7 @@
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
     /// <inheritdoc />
     public partial class AutoMigration_20260515152037 : Migration

Avalonia-EFCore/Migrations/SQLite/20260515085847_AutoMigration_20260515165835.Designer.cs

@@ -8,9 +8,9 @@ using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
-    [DbContext(typeof(AppDataContext))]
+    [DbContext(typeof(SqliteAppDataContext))]
     [Migration("20260515085847_AutoMigration_20260515165835")]
     partial class AutoMigration_20260515165835
     {

Avalonia-EFCore/Migrations/SQLite/20260515085847_AutoMigration_20260515165835.cs

@@ -3,7 +3,7 @@ using Microsoft.EntityFrameworkCore.Migrations;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
     /// <inheritdoc />
     public partial class AutoMigration_20260515165835 : Migration

Avalonia-EFCore/Migrations/SQLite/20260520083230_AutoMigration_20260520163216.Designer.cs

@@ -0,0 +1,179 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SQLite
+{
+    [DbContext(typeof(SqliteAppDataContext))]
+    [Migration("20260520083230_AutoMigration_20260520163216")]
+    partial class AutoMigration_20260520163216
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "10.0.7");
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER")
+                        .HasColumnName("id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("INTEGER")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/SQLite/20260520083230_AutoMigration_20260520163216.cs

@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SQLite
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520163216 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "password-hash",
+                table: "user",
+                type: "TEXT",
+                maxLength: 200,
+                nullable: true,
+                comment: "密码哈希值");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "password-hash",
+                table: "user");
+        }
+    }
+}

Avalonia-EFCore/Migrations/SQLite/SqliteAppDataContextModelSnapshot.cs

@@ -7,15 +7,15 @@ using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 #nullable disable
 
-namespace Avalonia_EFCore.Migrations
+namespace Avalonia_EFCore.Migrations.SQLite
 {
-    [DbContext(typeof(AppDataContext))]
-    partial class AppDataContextModelSnapshot : ModelSnapshot
+    [DbContext(typeof(SqliteAppDataContext))]
+    partial class SqliteAppDataContextModelSnapshot : ModelSnapshot
     {
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
-            modelBuilder.HasAnnotation("ProductVersion", "10.0.0");
+            modelBuilder.HasAnnotation("ProductVersion", "10.0.7");
 
             modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
                 {
@@ -102,6 +102,12 @@ namespace Avalonia_EFCore.Migrations
                         .HasColumnName("name")
                         .HasComment("用户名称");
 
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("TEXT")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
                     b.Property<string>("PhoneNumber")
                         .HasMaxLength(50)
                         .HasColumnType("TEXT")

Avalonia-EFCore/Migrations/SqlServer/20260520082607_AutoMigration_20260520162543.Designer.cs

@@ -0,0 +1,184 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SqlServer
+{
+    [DbContext(typeof(SqlServerAppDataContext))]
+    [Migration("20260520082607_AutoMigration_20260520162543")]
+    partial class AutoMigration_20260520162543
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/SqlServer/20260520082607_AutoMigration_20260520162543.cs

@@ -0,0 +1,96 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SqlServer
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520162543 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "api-refresh-token",
+                columns: table => new
+                {
+                    id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    userid = table.Column<int>(name: "user-id", type: "int", nullable: false),
+                    tokenhash = table.Column<string>(name: "token-hash", type: "nvarchar(128)", maxLength: 128, nullable: false),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime2", nullable: false),
+                    expiresat = table.Column<DateTime>(name: "expires-at", type: "datetime2", nullable: false),
+                    revokedat = table.Column<DateTime>(name: "revoked-at", type: "datetime2", nullable: true),
+                    replacedbytokenhash = table.Column<string>(name: "replaced-by-token-hash", type: "nvarchar(128)", maxLength: 128, nullable: true),
+                    device = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: true),
+                    ipaddress = table.Column<string>(name: "ip-address", type: "nvarchar(64)", maxLength: 64, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-api-refresh-token", x => x.id);
+                },
+                comment: "API refresh token");
+
+            migrationBuilder.CreateTable(
+                name: "user",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "int", nullable: false, comment: "用户主键")
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    name = table.Column<string>(type: "nvarchar(100)", maxLength: 100, nullable: true, comment: "用户名称"),
+                    email = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: true, comment: "用户邮箱"),
+                    phonenumber = table.Column<string>(name: "phone-number", type: "nvarchar(50)", maxLength: 50, nullable: true, comment: "电话号码"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime2", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "datetime2", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-user", x => x.id);
+                },
+                comment: "用户实体，演示数据库 CRUD 操作");
+
+            migrationBuilder.CreateTable(
+                name: "weather-forecast",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "int", nullable: false, comment: "天气预报主键")
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    date = table.Column<DateOnly>(type: "date", nullable: false, comment: "预报日期"),
+                    temperaturec = table.Column<int>(name: "temperature-c", type: "int", nullable: false, comment: "摄氏温度"),
+                    summary = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: true, comment: "天气摘要"),
+                    createdat = table.Column<DateTime>(name: "created-at", type: "datetime2", nullable: false, comment: "创建时间"),
+                    updatedat = table.Column<DateTime>(name: "updated-at", type: "datetime2", nullable: false, comment: "更新时间")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk-weather-forecast", x => x.id);
+                },
+                comment: "天气预报数据实体");
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-hash",
+                table: "api-refresh-token",
+                column: "token-hash",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "idx-api-refresh-token-user-id",
+                table: "api-refresh-token",
+                column: "user-id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "api-refresh-token");
+
+            migrationBuilder.DropTable(
+                name: "user");
+
+            migrationBuilder.DropTable(
+                name: "weather-forecast");
+        }
+    }
+}

Avalonia-EFCore/Migrations/SqlServer/20260520083242_AutoMigration_20260520163216.Designer.cs

@@ -0,0 +1,190 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SqlServer
+{
+    [DbContext(typeof(SqlServerAppDataContext))]
+    [Migration("20260520083242_AutoMigration_20260520163216")]
+    partial class AutoMigration_20260520163216
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Migrations/SqlServer/20260520083242_AutoMigration_20260520163216.cs

@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SqlServer
+{
+    /// <inheritdoc />
+    public partial class AutoMigration_20260520163216 : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "password-hash",
+                table: "user",
+                type: "nvarchar(200)",
+                maxLength: 200,
+                nullable: true,
+                comment: "密码哈希值");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "password-hash",
+                table: "user");
+        }
+    }
+}

Avalonia-EFCore/Migrations/SqlServer/SqlServerAppDataContextModelSnapshot.cs

@@ -0,0 +1,187 @@
+// <auto-generated />
+using System;
+using Avalonia_EFCore.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Avalonia_EFCore.Migrations.SqlServer
+{
+    [DbContext(typeof(SqlServerAppDataContext))]
+    partial class SqlServerAppDataContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.ApiRefreshTokenEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at");
+
+                    b.Property<string>("Device")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("device");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("expires-at");
+
+                    b.Property<string>("IpAddress")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)")
+                        .HasColumnName("ip-address");
+
+                    b.Property<string>("ReplacedByTokenHash")
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("replaced-by-token-hash");
+
+                    b.Property<DateTime?>("RevokedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("revoked-at");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)")
+                        .HasColumnName("token-hash");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int")
+                        .HasColumnName("user-id");
+
+                    b.HasKey("Id")
+                        .HasName("pk-api-refresh-token");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique()
+                        .HasDatabaseName("idx-api-refresh-token-hash");
+
+                    b.HasIndex("UserId")
+                        .HasDatabaseName("idx-api-refresh-token-user-id");
+
+                    b.ToTable("api-refresh-token", t =>
+                        {
+                            t.HasComment("API refresh token");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.UserEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("用户主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("email")
+                        .HasComment("用户邮箱");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)")
+                        .HasColumnName("name")
+                        .HasComment("用户名称");
+
+                    b.Property<string>("PasswordHash")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("password-hash")
+                        .HasComment("密码哈希值");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)")
+                        .HasColumnName("phone-number")
+                        .HasComment("电话号码");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-user");
+
+                    b.ToTable("user", t =>
+                        {
+                            t.HasComment("用户实体，演示数据库 CRUD 操作");
+                        });
+                });
+
+            modelBuilder.Entity("Avalonia_EFCore.Models.WeatherForecastEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id")
+                        .HasComment("天气预报主键");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("created-at")
+                        .HasComment("创建时间");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("date")
+                        .HasColumnName("date")
+                        .HasComment("预报日期");
+
+                    b.Property<string>("Summary")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)")
+                        .HasColumnName("summary")
+                        .HasComment("天气摘要");
+
+                    b.Property<int>("TemperatureC")
+                        .HasColumnType("int")
+                        .HasColumnName("temperature-c")
+                        .HasComment("摄氏温度");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("datetime2")
+                        .HasColumnName("updated-at")
+                        .HasComment("更新时间");
+
+                    b.HasKey("Id")
+                        .HasName("pk-weather-forecast");
+
+                    b.ToTable("weather-forecast", t =>
+                        {
+                            t.HasComment("天气预报数据实体");
+                        });
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Avalonia-EFCore/Models/UserEntity.cs

@@ -28,6 +28,14 @@ namespace Avalonia_EFCore.Models
         [MaxLength(100)]
         public string? Name { get; set; }
 
+        /// <summary>
+        /// 获取或设置用户密码哈希值。
+        /// </summary>
+        [Comment("密码哈希值")]
+        [Column("password-hash")]
+        [MaxLength(200)]
+        public string? PasswordHash { get; set; }
+
         /// <summary>
         /// 获取或设置用户邮箱。
         /// </summary>

Avalonia-PC/Avalonia-PC.csproj

@@ -36,7 +36,7 @@
     </PackageReference>
     <PackageReference Include="Avalonia.Controls.WebView" Version="12.0.0" />
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.2" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.7" />
   </ItemGroup>
 
   <ItemGroup>

Avalonia-Services/Avalonia-Services.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.7" />
     <PackageReference Include="Serilog" Version="4.2.0" />
     <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />

scripts/add-migration.ps1

@@ -1,6 +1,7 @@
 param(
     [string]$Name,
-    [string]$Context = "AppDataContext",
+    [ValidateSet("SQLite", "SqlServer", "PostgreSQL", "MySQL", "All")]
+    [string]$Provider = "All",
     [string]$Project = "Avalonia-EFCore/Avalonia-EFCore.csproj",
     [string]$StartupProject = "Avalonia-API/Avalonia-API.csproj",
     [string]$OutputDir = "Migrations"
@@ -21,45 +22,71 @@ if ($LASTEXITCODE -ne 0) {
     throw "dotnet tool restore failed."
 }
 
-Write-Host "Generating migration '$Name'..."
-dotnet tool run dotnet-ef migrations add $Name `
-    --project $Project `
-    --startup-project $StartupProject `
-    --context $Context `
-    --output-dir $OutputDir
-if ($LASTEXITCODE -ne 0) {
-    throw "dotnet ef migrations add failed."
+function Get-ContextName([string]$providerName) {
+    switch ($providerName) {
+        "SQLite" { return "SqliteAppDataContext" }
+        "SqlServer" { return "SqlServerAppDataContext" }
+        "PostgreSQL" { return "PostgreSqlAppDataContext" }
+        "MySQL" { return "MySqlAppDataContext" }
+        default { throw "Unsupported provider '$providerName'." }
+    }
 }
 
-$migrationDir = Join-Path (Split-Path $Project -Parent) $OutputDir
-$migrationFile = Get-ChildItem $migrationDir -Filter "*_$Name.cs" |
+function Add-ProviderMigration([string]$providerName) {
+    $context = Get-ContextName $providerName
+    $providerOutputDir = Join-Path $OutputDir $providerName
+
+    Write-Host "Generating migration '$Name' for $providerName..."
+    dotnet tool run dotnet-ef migrations add $Name `
+        --project $Project `
+        --startup-project $StartupProject `
+        --context $context `
+        --output-dir $providerOutputDir
+    if ($LASTEXITCODE -ne 0) {
+        throw "dotnet ef migrations add failed for $providerName."
+    }
+
+    $migrationDir = Join-Path (Split-Path $Project -Parent) $providerOutputDir
+    $migrationFile = Get-ChildItem $migrationDir -Filter "*_$Name.cs" |
         Where-Object { $_.Name -notlike "*.Designer.cs" } |
         Sort-Object LastWriteTime -Descending |
         Select-Object -First 1
 
-if ($null -eq $migrationFile) {
-    throw "Migration file was not found for '$Name'."
-}
+    if ($null -eq $migrationFile) {
+        throw "Migration file was not found for '$Name' ($providerName)."
+    }
 
-$content = Get-Content $migrationFile.FullName -Raw
-$upMatch = [regex]::Match($content, "protected override void Up\(MigrationBuilder migrationBuilder\)\s*\{(?<body>.*?)\n\s*\}", "Singleline")
-$downMatch = [regex]::Match($content, "protected override void Down\(MigrationBuilder migrationBuilder\)\s*\{(?<body>.*?)\n\s*\}", "Singleline")
+    $content = Get-Content $migrationFile.FullName -Raw
+    $upMatch = [regex]::Match($content, "protected override void Up\(MigrationBuilder migrationBuilder\)\s*\{(?<body>.*?)\n\s*\}", "Singleline")
+    $downMatch = [regex]::Match($content, "protected override void Down\(MigrationBuilder migrationBuilder\)\s*\{(?<body>.*?)\n\s*\}", "Singleline")
 
-$upBody = if ($upMatch.Success) { $upMatch.Groups["body"].Value.Trim() } else { "" }
-$downBody = if ($downMatch.Success) { $downMatch.Groups["body"].Value.Trim() } else { "" }
+    $upBody = if ($upMatch.Success) { $upMatch.Groups["body"].Value.Trim() } else { "" }
+    $downBody = if ($downMatch.Success) { $downMatch.Groups["body"].Value.Trim() } else { "" }
 
-if ([string]::IsNullOrWhiteSpace($upBody) -and [string]::IsNullOrWhiteSpace($downBody)) {
-    Write-Host "No model changes were detected. Removing empty migration '$Name'..."
+    if ([string]::IsNullOrWhiteSpace($upBody) -and [string]::IsNullOrWhiteSpace($downBody)) {
+        Write-Host "No model changes were detected for $providerName. Removing empty migration '$Name'..."
         dotnet tool run dotnet-ef migrations remove --force `
             --project $Project `
             --startup-project $StartupProject `
-        --context $Context
+            --context $context
         if ($LASTEXITCODE -ne 0) {
-        throw "dotnet ef migrations remove failed."
+            throw "dotnet ef migrations remove failed for $providerName."
         }
-    exit 0
+        return
+    }
+
+    Write-Host "Migration generated for ${providerName}:"
+    Write-Host "  $($migrationFile.FullName)"
 }
 
-Write-Host "Migration generated:"
-Write-Host "  $($migrationFile.FullName)"
-Write-Host "Review the migration, then start the app. Startup will automatically apply pending migrations."
+$providers = if ($Provider -eq "All") {
+    @("SQLite", "SqlServer", "PostgreSQL", "MySQL")
+} else {
+    @($Provider)
+}
+
+foreach ($providerName in $providers) {
+    Add-ProviderMigration $providerName
+}
+
+Write-Host "Review the migration files, then start the app. Startup will apply the migration set matching DatabaseConfiguration.Provider."