chore: checkpoint MiroFish runtime ops

[adrianlat]

Summary

• Add MiroFish host runbook, Hermes integration contract, and ops contract.
• Add LaunchDaemon/LaunchAgent templates plus host start/stop/status/smoke scripts.
• Route frontend API calls through /api and configure Vite dev/preview for LAN proxying.

Validation

• /Users/Shared/OpenClaw/mirofish-runtime/scripts/host-smoke-test.sh passed.
• Hermes npm run preflight:mirofish passed with READY mirofish.
• Hermes npm run dispatch:mirofish:smoke passed with DISPATCH_OK mirofish.

Notes

• Upstream push to 666ghj/MiroFish was denied for adrianlat, so this PR is opened from the adrianlat fork.
• Local iCloud source build was not used as final validation because its node_modules Rollup optional dependency was incomplete; the shared runtime smoke and Hermes dispatch were the authoritative checks.