Initial commit: dating app backend (Go/Gin/GORM/Postgres)

Phone+OTP auth, staged onboarding, admin approval workflow, and a
full discovery/swipe/match/chat system with photo upload and
approximate distance (haversine) based on user location.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/repository/message_repository.go

@@ -0,0 +1,35 @@
+package repository
+
+import (
+	"gorm.io/gorm"
+
+	"dating-app/internal/models"
+)
+
+type MessageRepository struct {
+	db *gorm.DB
+}
+
+func NewMessageRepository(db *gorm.DB) *MessageRepository {
+	return &MessageRepository{db: db}
+}
+
+func (r *MessageRepository) Create(msg *models.Message) error {
+	return r.db.Create(msg).Error
+}
+
+func (r *MessageRepository) ListByMatch(matchID uint) ([]models.Message, error) {
+	var messages []models.Message
+	err := r.db.Where("match_id = ?", matchID).Order("created_at asc").Find(&messages).Error
+	return messages, err
+}
+
+// LastMessage آخرین پیام یک مچ رو برمی‌گردونه (برای پیش‌نمایش لیست گفتگوها)
+func (r *MessageRepository) LastMessage(matchID uint) (*models.Message, error) {
+	var msg models.Message
+	err := r.db.Where("match_id = ?", matchID).Order("created_at desc").First(&msg).Error
+	if err != nil {
+		return nil, err
+	}
+	return &msg, nil
+}