feat(ui): reversal-rate + auto-action health card

[jeffrey701]

What & why

Closes #2193.

Adds a self-host analytics card surfacing auto-action reversal health — how often a human reopened or reverted a bot auto-action (from computeAgentHealth, src/review/ops.ts). It answers "is the bot's autonomy trustworthy, or are maintainers frequently overriding it?"

• reversal-health-card-model.ts — ReversalHealthReport / ReversedTarget types + pure folds: summarizeReversalHealth (a null rate when the denominator recentAutoActions is 0) and bandForReversalHealth (info when no auto-actions yet, ready at zero reversals, warn at/under a 10% reversal rate, blocked above).
• reversal-health-card.tsx — reversal-rate percentage + reversals / manual-rate Stat tiles, a StatusPill band, the list of reversed targets, and a graceful EmptyState when there are none or when the agentHealth field is absent on the payload.
• Wiring — app.analytics.tsx gains an optional agentHealth field and renders the card when present (backend computation is tracked in Maintainer analytics dashboard (gate precision, calibration, acceptance rate) #1967), so it degrades to an EmptyState until the data lands.

Tests (reversal-health-card.test.tsx): the rate/band folds (zero-reversals, above-threshold, empty-denominator) and the card's populated / empty-list / field-absent arms. ui:typecheck, ui:lint, vitest, and the Vite build all pass.

Screenshots

View	Before	After
Self-host analytics dashboard (/app/analytics)	screenshot pending	screenshot pending

⚠️ Draft — screenshots pending. The card renders on the operator-dashboard payload once an agentHealth slice is present; before/after screenshots of the analytics dashboard are being captured and will be added to the table above before this is marked ready for review.

[loopover-orb]

Warning

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⏸️ Gittensory review result - manual review recommended

_{Review updated: 2026-07-10 20:37:11 UTC}

4 files · no blockers · readiness 96/100 · CI pending · dirty

⏸️ Suggested Action - Manual Review

Signal	Result	Evidence
Code review	✅ No blockers	No AI review summary
Linked issue	✅ Linked	#2193
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (draft PR; 1 linked issue).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 120 registered-repo PR(s), 53 merged, 11 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	jeffrey701; Gittensor profile; 120 PR(s), 11 issue(s).
Gate result	✅ Passing	No configured blocker found.

Review context

• Author: jeffrey701
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: not available
• Official Gittensor activity: 120 PR(s), 11 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Mark ready when done.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

Visual preview

Route	Viewport	Before (production)	After (this PR's preview)	Diff
/app/analytics	desktop			—
/app/analytics	mobile			—

Click any thumbnail to open the full-size screenshot. Before = production · After = this PR's preview deploy.

_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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