feat(git): rename remote branches atomically via push

Adds a new command to rename remote branches and update tracking refs.
Renaming remote refs is performed atomically using a single push.
The push creates the new remote ref and deletes the old if it succeeds.
The frontend now invokes remote-rename when needed and shows labels.

- Atomic remote rename via push with create/ref and delete
- Frontend supports remote branch renames from the branch panel
- Compare UI now shows labels for remote refs in results

src-tauri/src/main.rs

@@ -24,11 +24,12 @@ use git::{
     merge_continue, move_worktree, open_repo_in_explorer, open_repository, open_repository_bundle,
     open_repository_file, prune_worktrees, pull, push, push_commit_notes, push_tag, read_conflict,
     rebase_abort, rebase_branch, rebase_continue, remove_remote, remove_worktree, rename_branch,
-    repair_worktree, resolve_conflict, resolve_conflict_side, restore_file_from_commit,
-    restore_files, restore_reflog_entry, restore_to_commit, revert_commit,
-    run_sequence_editor_if_requested, search_code_introductions, set_branch_upstream,
-    set_commit_note, stage_files, start_interactive_rebase, stash_apply, stash_drop, stash_pop,
-    stash_push, undo_last_commit, unlock_worktree, unstage_files, update_remote,
+    rename_remote_branch, repair_worktree, resolve_conflict, resolve_conflict_side,
+    restore_file_from_commit, restore_files, restore_reflog_entry, restore_to_commit,
+    revert_commit, run_sequence_editor_if_requested, search_code_introductions,
+    set_branch_upstream, set_commit_note, stage_files, start_interactive_rebase, stash_apply,
+    stash_drop, stash_pop, stash_push, undo_last_commit, unlock_worktree, unstage_files,
+    update_remote,
 };
 use tauri::Manager;
 use telemetry::{emit_frontend_log, emit_frontend_span, set_telemetry_enabled};
@@ -144,6 +145,7 @@ async fn main() {
             checkout_branch,
             create_branch,
             rename_branch,
+            rename_remote_branch,
             delete_branch,
             list_worktrees,
             add_worktree,