feat: 接入短信服务，修复 SMS 客户端 API 路径

- cmd/api/main.go: 新增 initSMS() 初始化短信客户端并注入 verificationService
- pkg/sms/client.go: 修复 API 路径缺少 /sms 前缀（/api/... → /sms/api/...）
- docker-compose.prod.yml: 添加线上短信服务环境变量

cmd/api/main.go

@@ -27,6 +27,7 @@ import (
 	"github.com/break/junhong_cmp_fiber/pkg/database"
 	"github.com/break/junhong_cmp_fiber/pkg/logger"
 	"github.com/break/junhong_cmp_fiber/pkg/queue"
+	"github.com/break/junhong_cmp_fiber/pkg/sms"
 	"github.com/break/junhong_cmp_fiber/pkg/storage"
 )
 
@@ -306,11 +307,42 @@ func initAuthComponents(cfg *config.Config, redisClient *redis.Client, appLogger
 	refreshTTL := time.Duration(cfg.JWT.RefreshTokenTTL) * time.Second
 	tokenManager := auth.NewTokenManager(redisClient, accessTTL, refreshTTL)
 
-	verificationSvc := verification.NewService(redisClient, nil, appLogger)
+	smsClient := initSMS(cfg, appLogger)
+	verificationSvc := verification.NewService(redisClient, smsClient, appLogger)
 
 	return jwtManager, tokenManager, verificationSvc
 }
 
+func initSMS(cfg *config.Config, appLogger *zap.Logger) *sms.Client {
+	if cfg.SMS.GatewayURL == "" {
+		appLogger.Info("短信服务未配置，跳过初始化")
+		return nil
+	}
+
+	timeout := cfg.SMS.Timeout
+	if timeout == 0 {
+		timeout = 10 * time.Second
+	}
+
+	httpClient := sms.NewStandardHTTPClient(0)
+	client := sms.NewClient(
+		cfg.SMS.GatewayURL,
+		cfg.SMS.Username,
+		cfg.SMS.Password,
+		cfg.SMS.Signature,
+		timeout,
+		appLogger,
+		httpClient,
+	)
+
+	appLogger.Info("短信服务已初始化",
+		zap.String("gateway_url", cfg.SMS.GatewayURL),
+		zap.String("signature", cfg.SMS.Signature),
+	)
+
+	return client
+}
+
 func initStorage(cfg *config.Config, appLogger *zap.Logger) *storage.Service {
 	if cfg.Storage.Provider == "" || cfg.Storage.S3.Endpoint == "" {
 		appLogger.Info("对象存储未配置，跳过初始化")