.機能追加、DBバグ修正

internal/models/notification_settings.go

@@ -0,0 +1,22 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// UserNotificationSettings stores user's notification preferences
+type UserNotificationSettings struct {
+	ID              uint           `gorm:"primarykey" json:"id"`
+	UserID          uint           `gorm:"uniqueIndex;not null" json:"user_id"`
+	TelegramEnabled bool           `gorm:"default:false" json:"telegram_enabled"`
+	TelegramChatID  string         `json:"telegram_chat_id"`
+	LineEnabled     bool           `gorm:"default:false" json:"line_enabled"`
+	LineNotifyToken string         `json:"-"` // Hide token from JSON
+	CreatedAt       time.Time      `json:"created_at"`
+	UpdatedAt       time.Time      `json:"updated_at"`
+	DeletedAt       gorm.DeletedAt `gorm:"index" json:"-"`
+
+	User *User `gorm:"foreignKey:UserID" json:"-"`
+}