… link to /console (#14376)

Mirrors
[OpenAudio/staking#2](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](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>