使用 pg 替换 sql

backend/internal/config/config.go

@@ -10,10 +10,10 @@ import (
 )
 
 type Config struct {
-	Port      string
-	JWTSecret string
-	DBPath    string
-	Mode      string // debug / release
+	Port        string
+	JWTSecret   string
+	DatabaseURL string
+	Mode        string // debug / release
 	// OpenAPIKey 皮肤源头开放接口标识（Header: X-Api-Key，可公开给对接方）
 	OpenAPIKey string
 	// OpenAPISecret 签名密钥（仅用于 HMAC，不走 Header）
@@ -35,7 +35,7 @@ func Load() *Config {
 	return &Config{
 		Port:          getEnv("PORT", "8080"),
 		JWTSecret:     getEnv("JWT_SECRET", "affiliate-dash-dev-secret-change-me"),
-		DBPath:        getEnv("DB_PATH", "data/app.db"),
+		DatabaseURL:   getEnv("DATABASE_URL", "postgres://affiliate:affiliate_dev_password@127.0.0.1:5432/affiliate_dash?sslmode=disable"),
 		Mode:          mode,
 		OpenAPIKey:    getEnv("OPEN_API_KEY", "sk_source_dev_key_change_me"),
 		OpenAPISecret: getEnv("OPEN_API_SECRET", "sk_source_dev_secret_change_me"),