mara on #630: host options page came up empty (template chrome with no
`<h2>` option headers).
Root cause: `pickSubtrees` filtered the host eval against the pre-#615
roots `[ "hyperhive" ]` and `[ "services" "hive-c0re" ]`. #615 moved
the whole host option tree under `services.hyperhive.*`; neither old
root matches anymore, so the filter silently produced an empty tree
and the rendered page degraded to just `<nav> + <main><h1></h1></main>
+ <footer>` chrome.
Fix: pick under `[ "services" "hyperhive" ]`. Agent options stay at
`[ "hyperhive" ]` — per-agent harness options weren't moved by #615.
Before: 100 lines, 0 `<h2>` headers
After: 661 lines, 33 `<h2>` headers covering:
services.hyperhive.{enable,domain,c0re.*,forge.*,matrix.*,gateway.*}
Closes#630.
1de4a6f654