feat: remote tab in task-create dialog — multi-row GitHub repo picker (#1116)

apps/backend/internal/task/service/service_tasks.go

@@ -289,9 +289,13 @@ func (s *Service) createTaskRepositories(ctx context.Context, taskID, workspaceI
 		// Multi-repo validation: each repository may appear at most once per task.
 		// Without this guard the unique (task_id, repository_id) constraint on
 		// task_repositories would surface as an opaque DB error mid-loop, leaving
-		// some rows already inserted.
+		// some rows already inserted. Name the repository (owner/name) instead of
+		// the raw UUID so the create-task dialog's error toast is human-readable —
+		// two PR URLs of the same repo (e.g. /pull/1116 and /pull/1117) collapse
+		// to the same repositoryID and hit this path.
 		if seen[repositoryID] {
-			return fmt.Errorf("repository %q listed more than once for the task", repositoryID)
+			label := s.repoDisplayLabel(ctx, repoInput, repositoryID)
+			return fmt.Errorf("repository %q is listed more than once for this task", label)
 		}
 		seen[repositoryID] = true
 		metadata := make(map[string]interface{})
@@ -314,6 +318,28 @@ func (s *Service) createTaskRepositories(ctx context.Context, taskID, workspaceI
 	return nil
 }
 
+// repoDisplayLabel returns a human-readable label for a repository to surface
+// in the duplicate-repository error. It prefers owner/name parsed from the
+// input's GitHub URL, then the resolved repo entity's owner/name (or bare
+// name), and finally falls back to the repositoryID so the message is never
+// empty. Best-effort: lookup failures degrade to the next fallback.
+func (s *Service) repoDisplayLabel(ctx context.Context, repoInput TaskRepositoryInput, repositoryID string) string {
+	if repoInput.GitHubURL != "" {
+		if owner, name, err := parseGitHubRepoURL(repoInput.GitHubURL); err == nil {
+			return owner + "/" + name
+		}
+	}
+	if repo, err := s.repoEntities.GetRepository(ctx, repositoryID); err == nil && repo != nil {
+		if repo.ProviderOwner != "" && repo.ProviderName != "" {
+			return repo.ProviderOwner + "/" + repo.ProviderName
+		}
+		if repo.Name != "" {
+			return repo.Name
+		}
+	}
+	return repositoryID
+}
+
 // resolveRepoInput resolves a RepositoryInput to a repositoryID and baseBranch,
 // creating the repository if it doesn't exist yet.
 func (s *Service) resolveRepoInput(ctx context.Context, workspaceID string, repoInput TaskRepositoryInput, repoByPath map[string]*models.Repository) (repositoryID, baseBranch string, err error) {