Early sleep calendar

A DeepSeek Harness plugin that adds an early-sleep check-in calendar to the Web UI.

• Sidebar panel (early-sleep): month calendar and year overview views.
• Click any day to add or edit a sleep record (bedtime + optional note); delete with one click.
• Failure rule: a bedtime from 00:00 through 11:59 means the night went past midnight, so it is marked failed (warning color) and excluded from the success stats and streaks.
• Stats: successful nights, current streak, longest streak, this-month successes; the footer lists total records including past-midnight failures.
• Quick check-in button for tonight in the panel header.
• Records are stored on the Host in <DSH_HOME>/early-sleep/records.json (atomic writes, one record per date).

API

Host route GET|POST|DELETE /api/early-sleep/records:

• GET → { ok, records: [{ date, time, note, createdAt }] }
• POST body { date: "YYYY-MM-DD", time?: "HH:MM", note?: string } → upsert, returns the full list
• DELETE ?date=YYYY-MM-DD → remove, returns the full list

config.dataFile overrides the storage path in cordis.patch.yml if needed.