feat: 添加安装向导功能

- 后端：安装状态检测API、数据库连接测试、配置文件生成
- 后端：支持SQLite/MySQL数据库选择
- 后端：JWT密钥自动生成或手动设置
- 前端：安装向导界面（数据库配置、安全配置、管理员账号）
- 前端：路由守卫检测安装状态，未安装自动跳转安装页面

backend/internal/database/database.go

@@ -30,15 +30,92 @@ var (
 	RDB *redis.Client
 )
 
-// Init 初始化数据库连接
 func Init() {
-	initMySQL()
+	initDatabase()
 	initRedis()
 }
 
-// initMySQL 初始化MySQL连接
-func initMySQL() {
-	// 尝试连接MySQL
+func initDatabase() {
+	dbType := config.GetString("database.type")
+	if dbType == "" {
+		dbType = "auto"
+	}
+
+	switch dbType {
+	case "sqlite":
+		initSQLite()
+	case "mysql":
+		initMySQLExplicit()
+	default:
+		initAutoDetect()
+	}
+}
+
+func initSQLite() {
+	dbPath := "verification_platform.db"
+	absPath, err := filepath.Abs(dbPath)
+	if err != nil {
+		log.Fatal("Failed to get absolute path:", err.Error())
+	}
+
+	wd, err := os.Getwd()
+	if err == nil && filepath.Base(wd) == "cmd" {
+		absPath = filepath.Join(filepath.Dir(wd), "verification_platform.db")
+	}
+
+	var errOpen error
+	DB, errOpen = gorm.Open(sqlite.Open(absPath), &gorm.Config{
+		Logger:                                   logger.Default.LogMode(logger.Silent),
+		DisableForeignKeyConstraintWhenMigrating: true,
+	})
+	if errOpen != nil {
+		log.Fatal("Failed to create SQLite database:", errOpen.Error())
+	}
+	log.Printf("Using SQLite database: %s\n", absPath)
+
+	if sqlDB, err := DB.DB(); err == nil {
+		sqlDB.SetMaxIdleConns(10)
+		sqlDB.SetMaxOpenConns(100)
+		sqlDB.SetConnMaxLifetime(time.Hour)
+	}
+
+	runMigrations()
+}
+
+func initMySQLExplicit() {
+	dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=%s&parseTime=True&loc=Local",
+		config.GetString("database.username"),
+		config.GetString("database.password"),
+		config.GetString("database.host"),
+		config.GetString("database.port"),
+		config.GetString("database.name"),
+		config.GetString("database.charset"),
+	)
+
+	var err error
+	DB, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
+		Logger:                                   logger.Default.LogMode(logger.Silent),
+		DisableForeignKeyConstraintWhenMigrating: true,
+	})
+	if err != nil {
+		log.Fatal("Failed to connect to MySQL:", err.Error())
+	}
+	log.Printf("Connected to MySQL: %s@%s:%s/%s\n",
+		config.GetString("database.username"),
+		config.GetString("database.host"),
+		config.GetString("database.port"),
+		config.GetString("database.name"))
+
+	if sqlDB, err := DB.DB(); err == nil {
+		sqlDB.SetMaxIdleConns(config.GetInt("database.max_idle_conns"))
+		sqlDB.SetMaxOpenConns(config.GetInt("database.max_open_conns"))
+		sqlDB.SetConnMaxLifetime(time.Hour)
+	}
+
+	runMigrations()
+}
+
+func initAutoDetect() {
 	dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=%s&parseTime=True&loc=Local",
 		config.GetString("database.username"),
 		config.GetString("database.password"),
@@ -54,28 +131,18 @@ func initMySQL() {
 		DisableForeignKeyConstraintWhenMigrating: true,
 	})
 
-	// 如果MySQL连接失败，创建一个SQLite数据库用于开发
 	if err != nil {
 		log.Println("Failed to connect to MySQL, using SQLite database for development:", err.Error())
 
-		log.Println("Using file database for development")
-
 		dbPath := "verification_platform.db"
-
 		absPath, err := filepath.Abs(dbPath)
 		if err != nil {
 			log.Fatal("Failed to get absolute path:", err.Error())
 		}
 
 		wd, err := os.Getwd()
-		if err != nil {
-			log.Fatal("Failed to get working directory:", err.Error())
-		}
-		log.Printf("Working directory: %s, basename: %s\n", wd, filepath.Base(wd))
-
-		if filepath.Base(wd) == "cmd" {
-			dbPath = filepath.Join(filepath.Dir(wd), "verification_platform.db")
-			absPath = dbPath
+		if err == nil && filepath.Base(wd) == "cmd" {
+			absPath = filepath.Join(filepath.Dir(wd), "verification_platform.db")
 		}
 
 		DB, err = gorm.Open(sqlite.Open(absPath), &gorm.Config{
@@ -88,14 +155,16 @@ func initMySQL() {
 		log.Printf("Database file path: %s\n", absPath)
 	}
 
-	// 设置连接池（仅对非内存数据库有效）
 	if sqlDB, err := DB.DB(); err == nil {
 		sqlDB.SetMaxIdleConns(config.GetInt("database.max_idle_conns"))
 		sqlDB.SetMaxOpenConns(config.GetInt("database.max_open_conns"))
 		sqlDB.SetConnMaxLifetime(time.Hour)
 	}
 
-	// 检查applications表结构
+	runMigrations()
+}
+
+func runMigrations() {
 	var columns []struct {
 		CID        int
 		Name       string
@@ -126,7 +195,7 @@ func initMySQL() {
 	}
 
 	// 自动迁移数据库表
-	err = DB.AutoMigrate(
+	if err := DB.AutoMigrate(
 		&model.User{},
 		&model.AppUser{},
 		&model.UserLevel{},
@@ -180,8 +249,7 @@ func initMySQL() {
 		&model.EmailTemplate{},
 		&model.VersionFile{},
 		&model.CloudVariableRecord{},
-	)
-	if err != nil {
+	); err != nil {
 		log.Println("Failed to migrate database:", err.Error())
 	}