feat: choose probe/agent links from the admin, fix the overview popover [CI]

The panel decides which probes link to which agents (probes dial out): an
auto-link setting plus per-pair manual overrides with a link matrix in the
admin, and the hovered overview card is lifted above its neighbours.

web/shared/api/client.ts

@@ -83,5 +83,6 @@ export const api = {
   get: <T>(path: string, query?: Query, init?: RequestInit) => request<T>('GET', withQuery(path, query), undefined, init),
   post: <T>(path: string, body?: unknown) => request<T>('POST', path, body ?? {}),
   patch: <T>(path: string, body: unknown) => request<T>('PATCH', path, body),
+  put: <T>(path: string, body: unknown) => request<T>('PUT', path, body),
   del: <T>(path: string) => request<T>('DELETE', path),
 }