refactor: remove features beyond the UX plan

Drop additions that the UX plan does not ask for:

- the interactive label edit form; label edit now requires a flag
- label clone and the skip mode of label creation it needed
- repo rename rewriting the Git remote or tea.repository; it now
  warns that the remote still points to the old name
- the extra "source" remote on clones of pull mirrors
- run artifact download, which duplicates run download --zip
- 256-color and 24-bit label swatches; colors stay ANSI 16
- config list --show-source (config get keeps it)
- the membership and access GETs before team member/repo add and
  remove; Gitea's PUT and DELETE are idempotent

label edit/delete keep --by-name: it is the only way to address a
label whose name is a number that is also another label's ID.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/repo_mutations.go

@@ -487,13 +487,6 @@ func (a *application) cloneRepository(cmd *cobra.Command, t target, item service
 		}
 		a.done(cmd, "Added remote %s for %s; tea commands in the clone target it (change with tea repo set-default)", opts.upstream, item.Parent.FullName)
 	}
-	// The remote is named source because repository discovery prefers a remote named upstream.
-	if source := mirrorSourceURL(item); source != "" {
-		if _, err := a.gitIn(cmd.Context(), clone, "remote", "add", "--", "source", source); err != nil {
-			return clone, fmt.Errorf("cloned the mirror, but could not add the source remote: %w", err)
-		}
-		a.done(cmd, "Added remote source for the mirror's source")
-	}
 	return clone, nil
 }
 
@@ -593,9 +586,7 @@ func (a *application) repoRenameCommand() *cobra.Command {
 	command := &cobra.Command{
 		Use:   "rename <new-name>",
 		Short: "Rename a repository",
-		Long: `Rename a repository; its owner stays the same. Gitea redirects the old name to the new one. When
-the repository was found through a Git remote of the current clone, or through tea repo set-default,
-that remote or setting moves to the new name.`,
+		Long:  "Rename a repository; its owner stays the same. Gitea redirects the old name to the new one.",
 		Example: `# Rename the repository of the current clone
 $ tea repo rename new-name
 
@@ -630,8 +621,8 @@ $ tea repo rename new-name -R alice/old-name`,
 				return err
 			}
 			a.done(cmd, "Renamed repository %s to %s", t.Repo, item.FullName)
-			if err := a.followRename(cmd, t, current, item); err != nil {
-				return err
+			if remote, ok := strings.CutPrefix(t.RepoSource, "remote "); ok {
+				a.warn(cmd, "Git remote %s still points to %s; update it with git remote set-url", remote, t.Repo)
 			}
 			return a.writeMutationJSON(cmd, item)
 		},
@@ -639,46 +630,6 @@ $ tea repo rename new-name -R alice/old-name`,
 	return command
 }
 
-// followRename points the Git remote or the saved default repository that selected a renamed
-// repository, previously named old, at its new name.
-func (a *application) followRename(cmd *cobra.Command, t target, old string, item services.Repository) error {
-	if remote, ok := strings.CutPrefix(t.RepoSource, "remote "); ok {
-		raw, err := a.git(cmd.Context(), "remote", "get-url", remote)
-		if err != nil {
-			return fmt.Errorf("renamed %s, but could not read Git remote %s: %w", item.FullName, remote, err)
-		}
-		renamed, ok := renamedURL(raw, old, item.Name)
-		if !ok {
-			a.warn(cmd, "Git remote %s still points to %s; update it with git remote set-url", remote, t.Repo)
-			return nil
-		}
-		if _, err := a.git(cmd.Context(), "remote", "set-url", remote, renamed); err != nil {
-			return fmt.Errorf("renamed %s, but could not update Git remote %s: %w", item.FullName, remote, err)
-		}
-		a.done(cmd, "Updated Git remote %s to %s", remote, item.FullName)
-	}
-	if t.RepoSource == "git config tea.repository" {
-		if _, err := a.git(cmd.Context(), "config", "--local", "tea.repository", t.Host+"/"+item.FullName); err != nil {
-			return fmt.Errorf("renamed %s, but could not update the default repository: %w", item.FullName, err)
-		}
-		a.done(cmd, "Set %s as the default repository for this clone", item.FullName)
-	}
-	return nil
-}
-
-// renamedURL replaces the repository name old at the end of a remote URL with name, keeping the
-// rest of the URL, such as an SSH host alias, and its .git suffix.
-func renamedURL(raw, old, name string) (string, bool) {
-	base, suffix := strings.TrimSuffix(raw, "/"), ""
-	if trimmed, ok := strings.CutSuffix(base, ".git"); ok {
-		base, suffix = trimmed, ".git"
-	}
-	if len(base) <= len(old) || !strings.EqualFold(base[len(base)-len(old):], old) || !strings.ContainsRune("/:", rune(base[len(base)-len(old)-1])) {
-		return "", false
-	}
-	return base[:len(base)-len(old)] + name + suffix, true
-}
-
 func (a *application) repoDeleteCommand() *cobra.Command {
 	command := &cobra.Command{
 		Use:   "delete [<repository>]",