refactor: clarify running status diagnostics

[cxymds]

Pull Request

Description

Reorganizes the running status page around the current operational result before supporting diagnostics. Adds a compact cluster summary, routes peer and storage diagnostics into cluster health, surfaces stale or degraded usage data beside scanner metrics, and moves raw diagnostic sources into a compact collapsible section. Missing optional diagnostics are no longer rendered as five synthetic not_reported rows.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code refactoring
• Performance improvement
• Test improvements
• Security fix

Testing

• Unit tests added/updated
• Manual testing completed

pnpm install --frozen-lockfile
pnpm type-check
pnpm lint
pnpm format:check
pnpm test:run
pnpm build

Checklist

• Code follows the project's style guidelines
• Self-review completed
• TypeScript types are properly defined
• All commit messages are in English (Conventional Commits)
• All existing tests pass
• No new dependencies added, or they are justified

Related Issues

N/A

Screenshots (if applicable)

A local static design preview was reviewed before implementation. Runtime screenshot capture requires a connected RustFS backend and authenticated admin session; the standalone development server redirects /status to /403 when those services are unavailable.

Additional Notes

• Diagnostic details automatically open when a newly refreshed status changes to degraded, stale, or unknown.
• not_reported remains a neutral optional-source state and does not by itself mark the cluster unhealthy.
• Locale key structure remains aligned across all 14 language packs.