feat(campaigns): align chatwoot payloads

internal/repository/campaign_repo.go

@@ -21,6 +21,14 @@ func NewCampaignRepo(db *gorm.DB) *CampaignRepo {
 
 // Create creates a new campaign.
 func (r *CampaignRepo) Create(ctx context.Context, c *campaign.Campaign) error {
+	if c.DisplayID == 0 {
+		var next uint
+		if err := r.db.WithContext(ctx).Model(&campaign.Campaign{}).
+			Select("COALESCE(MAX(display_id), 0) + 1").Scan(&next).Error; err != nil {
+			return err
+		}
+		c.DisplayID = next
+	}
 	return r.db.WithContext(ctx).Create(c).Error
 }
 
@@ -35,9 +43,19 @@ func (r *CampaignRepo) FindByID(ctx context.Context, id uint) (*campaign.Campaig
 
 // FindByIDAndAccount retrieves a campaign scoped to an account.
 func (r *CampaignRepo) FindByIDAndAccount(ctx context.Context, id, accountID uint) (*campaign.Campaign, error) {
+	return r.FindByDisplayIDAndAccountOrID(ctx, id, accountID)
+}
+
+// FindByDisplayIDAndAccountOrID retrieves a campaign by Chatwoot display_id, falling back to primary key for legacy callers/tests.
+func (r *CampaignRepo) FindByDisplayIDAndAccountOrID(ctx context.Context, routeID, accountID uint) (*campaign.Campaign, error) {
 	var c campaign.Campaign
-	if err := r.db.WithContext(ctx).
-		Where("id = ? AND account_id = ?", id, accountID).First(&c).Error; err != nil {
+	base := r.db.WithContext(ctx).Preload("Inbox").Preload("Sender")
+	if err := base.Where("account_id = ? AND display_id = ?", accountID, routeID).First(&c).Error; err == nil {
+		return &c, nil
+	} else if err != gorm.ErrRecordNotFound {
+		return nil, err
+	}
+	if err := r.db.WithContext(ctx).Preload("Inbox").Preload("Sender").Where("account_id = ? AND id = ?", accountID, routeID).First(&c).Error; err != nil {
 		return nil, err
 	}
 	return &c, nil
@@ -53,10 +71,17 @@ func (r *CampaignRepo) ListByAccount(ctx context.Context, accountID uint, offset
 		return nil, 0, err
 	}
 
-	err := r.db.WithContext(ctx).
+	query := r.db.WithContext(ctx).
+		Preload("Inbox").Preload("Sender").
 		Where("account_id = ?", accountID).
-		Order("created_at DESC").Offset(offset).Limit(limit).
-		Find(&campaigns).Error
+		Order("created_at DESC")
+	if offset > 0 {
+		query = query.Offset(offset)
+	}
+	if limit > 0 {
+		query = query.Limit(limit)
+	}
+	err := query.Find(&campaigns).Error
 	if err != nil {
 		return nil, 0, err
 	}