feat(widget): finish chatwoot widget stub burn-down

internal/repository/contact_repo.go

@@ -134,6 +134,16 @@ func (r *ContactRepo) FindByEmail(ctx context.Context, accountID uint, email str
 	return &contact, nil
 }
 
+// FindByIdentifier retrieves a contact by external identifier within an account.
+func (r *ContactRepo) FindByIdentifier(ctx context.Context, accountID uint, identifier string) (*model.Contact, error) {
+	var contact model.Contact
+	err := r.db.WithContext(ctx).Where("account_id = ? AND identifier = ?", accountID, identifier).First(&contact).Error
+	if err != nil {
+		return nil, err
+	}
+	return &contact, nil
+}
+
 // CountByAccount returns total number of contacts in an account.
 func (r *ContactRepo) CountByAccount(ctx context.Context, accountID uint) (int64, error) {
 	var total int64
@@ -196,7 +206,7 @@ type ContactFilterParams struct {
 	ContactSource string `json:"contact_source,omitempty" form:"contact_source"`
 	InboxID       *uint  `json:"inbox_id,omitempty" form:"inbox_id"`
 	Labels        string `json:"labels,omitempty" form:"labels"`
-	Status        string `json:"status,omitempty" form:"status"`          // active, inactive
+	Status        string `json:"status,omitempty" form:"status"`                 // active, inactive
 	UpdatedWithin *int   `json:"updated_within,omitempty" form:"updated_within"` // seconds
 }
 
@@ -254,4 +264,4 @@ func (r *ContactRepo) Filter(ctx context.Context, accountID uint, params Contact
 	err := q.Offset(offset).Limit(limit).Order(orderClause).
 		Find(&contacts).Error
 	return contacts, total, err
-}
+}