⚡ implement user authentication and database initialization, add models for user, comment, label, and OIDC configuration

internal/model/label.go

@@ -0,0 +1,10 @@
+package model
+
+import "gorm.io/gorm"
+
+type Label struct {
+	gorm.Model
+	Key   string `gorm:"uniqueIndex"` // 标签键，唯一标识
+	Value string `gorm:"type:text"`   // 标签值，描述标签的内容
+	Color string `gorm:"type:text"`   // 前端可用颜色代码
+}