Merge pull request 'Fall back to prune-based removal for submodule-bearing worktrees' (#6) from fix/task-finish-remove into main

scripts/task.sh

@@ -127,7 +127,9 @@ cmd_finish() {
     echo "[verified] ${branch} 已包含于 origin/${TARGET_BRANCH}；成果已落盘"
   fi
   git submodule deinit --all -f >/dev/null 2>&1 || true
-  git -C "$mainrepo" worktree remove "$PWD" 2>/dev/null || { echo "finish: worktree remove 失败（含未清理内容）——已验证合入，可手动 rm -rf 后 git worktree prune" >&2; exit 1; }
+  # git 对含 gitlink 的 worktree 无条件拒绝 remove（查索引，与 deinit 无关）：
+  # 已验证合入且子模块已 deinit 后，直接清目录并 prune。
+  git -C "$mainrepo" worktree remove "$PWD" 2>/dev/null || { rm -rf "$PWD"; git -C "$mainrepo" worktree prune; }
   git -C "$mainrepo" branch -d "$branch" 2>/dev/null || git -C "$mainrepo" branch -D "$branch"
   git -C "$mainrepo" worktree prune
   git push -q --delete origin "$branch" 2>/dev/null || true