feat: Enhance dependency injection and service integration

- Updated main.go to initialize email service and include it in the dependency injection container.
- Refactored handlers to utilize context in service method calls, improving consistency and error handling.
- Introduced new service options for upload, security, and captcha services, enhancing modularity and testability.
- Removed unused repository implementations to streamline the codebase.

This commit continues the effort to improve the architecture by ensuring all services are properly injected and utilized across the application.

pkg/database/postgres.go

@@ -2,9 +2,12 @@ package database
 
 import (
 	"fmt"
+	"log"
+	"os"
+	"time"
 
 	"carrotskin/pkg/config"
-	
+
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
@@ -22,19 +25,23 @@ func New(cfg config.DatabaseConfig) (*gorm.DB, error) {
 		cfg.Timezone,
 	)
 
-	// 配置GORM日志级别
-	var gormLogLevel logger.LogLevel
-	switch {
-	case cfg.Driver == "postgres":
-		gormLogLevel = logger.Info
-	default:
-		gormLogLevel = logger.Silent
-	}
+	// 配置慢查询监控
+	newLogger := logger.New(
+		log.New(os.Stdout, "\r\n", log.LstdFlags),
+		logger.Config{
+			SlowThreshold:             200 * time.Millisecond, // 慢查询阈值：200ms
+			LogLevel:                  logger.Warn,            // 只记录警告和错误
+			IgnoreRecordNotFoundError: true,                   // 忽略记录未找到错误
+			Colorful:                  false,                  // 生产环境禁用彩色
+		},
+	)
 
 	// 打开数据库连接
 	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
-		Logger: logger.Default.LogMode(gormLogLevel),
-		DisableForeignKeyConstraintWhenMigrating: true, // 禁用自动创建外键约束，避免循环依赖问题
+		Logger:                                   newLogger,
+		DisableForeignKeyConstraintWhenMigrating: true, // 禁用外键约束
+		PrepareStmt:                              true, // 启用预编译语句缓存
+		QueryFields:                              true, // 明确指定查询字段
 	})
 	if err != nil {
 		return nil, fmt.Errorf("连接PostgreSQL数据库失败: %w", err)
@@ -46,10 +53,26 @@ func New(cfg config.DatabaseConfig) (*gorm.DB, error) {
 		return nil, fmt.Errorf("获取数据库实例失败: %w", err)
 	}
 
-	// 配置连接池
-	sqlDB.SetMaxIdleConns(cfg.MaxIdleConns)
-	sqlDB.SetMaxOpenConns(cfg.MaxOpenConns)
-	sqlDB.SetConnMaxLifetime(cfg.ConnMaxLifetime)
+	// 优化连接池配置
+	maxIdleConns := cfg.MaxIdleConns
+	if maxIdleConns <= 0 {
+		maxIdleConns = 10
+	}
+
+	maxOpenConns := cfg.MaxOpenConns
+	if maxOpenConns <= 0 {
+		maxOpenConns = 100
+	}
+
+	connMaxLifetime := cfg.ConnMaxLifetime
+	if connMaxLifetime <= 0 {
+		connMaxLifetime = 1 * time.Hour
+	}
+
+	sqlDB.SetMaxIdleConns(maxIdleConns)
+	sqlDB.SetMaxOpenConns(maxOpenConns)
+	sqlDB.SetConnMaxLifetime(connMaxLifetime)
+	sqlDB.SetConnMaxIdleTime(10 * time.Minute)
 
 	// 测试连接
 	if err := sqlDB.Ping(); err != nil {