第 1 阶段：用户与认证, mock登陆ok

backend/internal/router/dependencies.go

@@ -0,0 +1,11 @@
+package router
+
+import (
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+)
+
+type Dependencies struct {
+	DB    *gorm.DB
+	Redis *redis.Client
+}