v5.104.1

Muse Spark Open 816B on pooled Macs (hotfix on 5.104.0, TS+python only — Rust bytes identical to 5.104.0): muse-spark-open-816b-a42b catalog entry + smart-shard planner caps; mlx_shard_server Muse fixes (embed_norm, _finalize_logits) with the muse_spark mlx-lm pin; NEW hyperspace pod showcase (publish a pod's machines/layer ranges/live tokens to a public showcase page — never the pod key); pod join --name opt-in display name; pod limit / join --max-memory: choose how much memory your machine gives the pod (enforced on your own machine); pod create --hive-free/--hive-pro: send the account token (was always 401).