fix: use working clones for git repos

- Create normal working clones for remote repositories
- Initialize blank repositories with a main branch
- Align pull and branch helpers with unborn HEAD handling
- Gate fetch/pull on repositories with a remote

Quality gates: vitest repositories-settings-tab (passed); api pytest blocked by missing fastapi in environment

apps/api/src/utils/git_control.py

@@ -45,7 +45,10 @@ def get_status(repo_path: str) -> GitStatus:
     try:
         branch = _run_git_command(repo_path, "rev-parse", "--abbrev-ref", "HEAD").strip()
     except RuntimeError:
-        branch = "HEAD"
+        try:
+            branch = _run_git_command(repo_path, "symbolic-ref", "--short", "HEAD").strip()
+        except RuntimeError:
+            branch = "HEAD"
 
     status = GitStatus(branch=branch)
 
@@ -215,7 +218,8 @@ def pull(repo_path: str, branch: str | None = None) -> None:
     """
     args = ["pull"]
     if branch:
-        args.extend(["origin", branch])
+        args.append("origin")
+        args.append(branch)
     _run_git_command(repo_path, *args)
 
 
@@ -279,4 +283,7 @@ def get_current_branch(repo_path: str) -> str:
     Returns:
         Current branch name
     """
-    return _run_git_command(repo_path, "rev-parse", "--abbrev-ref", "HEAD").strip()
+    try:
+        return _run_git_command(repo_path, "rev-parse", "--abbrev-ref", "HEAD").strip()
+    except RuntimeError:
+        return _run_git_command(repo_path, "symbolic-ref", "--short", "HEAD").strip()