Branches pane never marks the default branch under local branches

[Defmon3]

Seen on: component/git-history

What it fixes

In Git History's branches pane, the default branch (usually main) is never marked as the default in the local branches list. Only the remote copy gets the marker. Someone scanning local branches cannot tell which one is the default without opening the remote section, and the existing branch toolbar marks it correctly, so the two views disagree.

How to fix it

When the server lists local branches for the history pane, it should resolve the remote's default branch name and flag the matching local branch, the same way the branch toolbar's listing already does. Tags stay unflagged. Ships with a test for a repository whose default branch exists locally.

[Defmon3]

Technical appendix: Branches pane never marks the default branch under local branches

Investigated on branch component/git-history at commit 821fc7f.

Findings

• File apps/server/src/vcs/GitVcsDriverCore.ts, function listHistoryRefs: isDefault is computed as namespace === "remote" && fullName === defaultRemoteRef. defaultRemoteRef comes from the symref row that git for-each-ref emits for the remote HEAD, which only exists under refs/remotes/. The local and tag namespaces therefore always produce isDefault: false. Established by reading the function.
• The contract VcsHistoryRef (file packages/contracts/src/git.ts) declares isDefault as a required boolean for every namespace.
• Consumers: file apps/web/src/components/git-history/GitHistoryRefsPane.tsx and apps/web/src/components/git-history/useGitHistoryRefs.ts read ref.isDefault without regard to namespace.
• The branch toolbar's listing in the same server file (the listRefs path) computes isDefault: name === defaultBranch for local branches, so the two listings disagree for the same repository.
• Not reproduced against a running server. No test in apps/server/src/vcs/GitVcsDriverCore.test.ts pins the local-namespace default flag for listHistoryRefs.

The problem

Observed: the local default branch row shows no default marker; only its remote copy does.

Once fixed: the local default branch row is marked, tags never are, and the marker agrees with what the branch toolbar shows for the same repository.