Sibling to the has_remote fix on this branch (6d97335d). Plain `git remote`
lists remote names defined in any config layer, so a [remote "origin"]
section inherited from ~/.gitconfig (e.g. with `prune = true`) made
list_remotes return ["origin"] for fresh local vaults. That broke
git_add_remote (returned "already_configured") and silently neutered
disconnect_all_remotes.
Reuse remote::remote_line_has_url to parse `git remote -v` output and
keep only remotes with a non-empty URL column. Dedupe by name across
the (fetch)/(push) line pair.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2b368dc8f0