docs: enhance schedule documentation coverage

[ysyneu]

Doc Review — 2026-03-27

Mode: audit (scope: on-call/schedule)
Findings: 6 actionable — 0 high, 4 medium, 2 low

Changes

Finding	Type	Module	Doc	Action
f001	missing_coverage	on-call	schedule.mdx	Added fair rotation to core concepts table and rule config
f002	missing_coverage	on-call	schedule.mdx	Listed all 4 rotation units (hour/day/week/month) with 1-30 range, handoff time condition
f003	missing_coverage	on-call	schedule.mdx	Documented 3 time restriction modes (none/daily/weekly), multiple periods, day mask interaction
f004	missing_coverage	on-call	schedule.mdx	Expanded notification section with personal channels (preference vs unified), group chat channels (9 IM platforms)
f005	missing_coverage	on-call	schedule.mdx	Added schedule detail view section (week/two-week/calendar, highlight my shifts)
f006	config_drift	on-call	schedule.mdx	Added schedule name constraints (1-40 chars, unique) and team permission note

Review checklist

• Verify rotation cycle units and value range match current UI
• Check that notification channel list matches current integrations
• Ensure tone and style match the rest of the docs
• Confirm fair rotation tooltip description is accurate

Mapping warnings

None

Skipped

• f007 (verified claim — Markdown description support confirmed)

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