A:增加“资料库”；增加模型注入

rear/internal/container/container.go

@@ -0,0 +1,16 @@
+package container
+
+import "rear/internal/repositories"
+
+type Container struct {
+	LibraryRepo *repositories.LibraryRepository
+	UserRepo    *repositories.UserService
+	// 其他服务...
+}
+
+func NewContainer() *Container {
+	return &Container{
+		LibraryRepo: repositories.NewLibraryRepository(),
+		UserRepo:    repositories.NewUserService(),
+	}
+}