Recapture spark-tools.jsonl from live muse exec --json #1155

Part of #877. Recapture muse exec --json (not --provider echo, not --yolo) that actually calls tools. Needs META_API_KEY or a stored muse login (~/.config/muse/auth.json). Save stdout under electron/test/fixtures/muse/spark-tools.jsonl plus stderr notes. Update CAPTURE.md with tool/thinking payload_type names and tool-name aliases from that capture only. Do not copy JSONL from the muse-codes crate.