claude-remote-control: pass --spawn=same-dir to avoid first-run prompt

Without it, a fresh `claude rc` start blocks on the interactive
"[1] same-dir / [2] worktree" spawn-mode question, which hangs the
systemd service on new hosts/directories until answered by hand.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

nixos/claude-remote-control.nix

@@ -79,6 +79,9 @@
           "${pkgs.claude-code}/bin/claude remote-control"
           "--remote-control-session-name-prefix ${namePrefix}"
           "--permission-mode bypassPermissions"
+          # Set spawn mode explicitly so a fresh start doesn't block on the
+          # interactive "[1] same-dir / [2] worktree" first-run prompt.
+          "--spawn same-dir"
         ];
         ExecStop = "${pkgs.tmux}/bin/tmux -L ${socket} kill-server";
         Restart = "on-failure";