feat(protocol-dashboard): show validator stats from /health-check and link to /console

[raymondjacobson]

Mirrors OpenAudio/staking#2 on the protocol dashboard — same code, applied here since the NodeOverview / useNodeHealth components are nearly identical between the two repos.

Summary

• Replaces the old uptime/disk/db health rows on the validator node page with stats parsed from the validator /health-check endpoint: Node Type, Peers (recursive count over nested groupings like inbound/outbound), Current Height, Storage Type, Last Restart (computed from timestamp - uptime), and Git SHA (short, full on hover).
• Adds a View Console button on the validator overview that opens ${endpoint}/console in a new tab.
• Drops the IndividualNodeUptimeChart section for validators only. Content Node and Discovery Node pages are unchanged.
• Guards the ServiceTable country flag against missing or non-ISO-3166 alpha-2 codes (validators may not report a country) — renders a neutral fallback instead.

Implementation notes vs. the staking PR

• The View Console button reuses the existing styles.modifyBtn / styles.modifyBtnText classes (matching the Manage Node button) instead of the staking app's global gradient-button manageNodeButton classes, which don't exist in this repo.

Test plan

• Navigate to a validator node page — confirm the six new stats render and the View Console button opens the validator's console in a new tab.
• Confirm Peers count matches reality on a node whose core.peers is grouped (e.g. inbound/outbound) — recursion sums across nested groups.
• Confirm Content Node and Discovery Node pages are visually unchanged (still show disk/db/peer-reachability/uptime chart).
• Confirm a validator with no core.peers shows 0 rather than blank.
• Confirm fetch failure renders the "Failed to fetch health data" row instead of an empty section.
• Confirm the ServiceTable falls back to a neutral 🏁 icon for rows whose country is missing or not a 2-letter code.

🤖 Generated with Claude Code

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