## Context

Repository creation currently produces mirrored bare repos for any remote clone and bare repos for blank creations. The workspace, file browser, commit editor, and git toolbar are built around a working-tree repository model, so users can hit 400s when they try to sync or when the repo has no usable branch state.

## Goals

- Create working clones for remote repositories
- Create working repos with an initial branch for blank repositories
- Preserve the existing repository create endpoint and shared UI flow
- Keep fetch/pull/push aligned with a normal local clone

## Decisions

1. Clone mode
- Use `git clone` without `--mirror`
- Keep the existing remote URL preflight and URL parsing behavior

2. Blank repositories
- Initialize with `git init -b main` when supported
- Fall back to `git init` plus `git symbolic-ref HEAD refs/heads/main` if needed

3. Branch state
- Treat `main` as the initial branch name for blank repos
- Make branch listing and current-branch helpers tolerate unborn `HEAD`

4. Pull behavior
- Prefer the current branch when no explicit branch is supplied
- Do not force `origin <branch>` if the branch is unborn or already tracked by the current checkout

## Risks

- Some older git versions may not support `git init -b`; the backend should fall back cleanly
- Existing blank repos created under the old bare model may still require migration or cleanup outside this change