fix(tui/merge): avoid showing agents HUD on handoff

codex-rs/tui/src/chatwidget.rs

@@ -11653,7 +11653,6 @@ impl ChatWidget<'_> {
                         &tx,
                         format!("`/merge` — handing off to agent ({})", reason_text),
                     );
-                    let _ = tx.send(AppEvent::PrepareAgents);
                     let mut preface = format!(
                         "[developer] Non-trivial git state detected while finalizing the branch. Reasons: {}.\n\nRepository context:\n- Repo root: {}\n- Worktree: {}\n- Branch to merge: {}\n- Default branch target: {}\n\nCurrent git status:\nWorktree status:\n{}\n\nRepo root status:\n{}\n\nRequired actions:\n1. cd {}\n   - Inspect status. Review the diff summary below and stage/commit only the changes that belong in this merge (`git add -A` + `git commit -m \"merge {} via /merge\"`). Stash or drop anything that should stay local.\n2. git fetch origin {}\n3. Merge the default branch into the worktree branch (`git merge origin/{}`) and resolve conflicts.\n4. cd {}\n   - Ensure the local {} branch exists (create tracking branch if needed). If checkout complains about local changes, stash safely, then checkout and pop/apply before finishing.\n5. Merge {} into {} from {} (`git merge --no-ff {}`) and resolve conflicts.\n6. Remove the worktree (`git worktree remove {} --force`) and delete the branch (`git branch -D {}`).\n7. End inside {} with a clean working tree and no leftover stashes. Pop/apply anything you created.\n\nReport back with a concise summary of the steps or explain any blockers.",
                         reason_text,