Add state management, WebSocket polling, html.js templating, and refactor pages

- lib/state.py: per-subsystem collectors with versioned state store
- daemon/server.py: state refresh on request, batch routing updates
- webui/static/hoover/html.js: new html tag template helper via htm.js
- webui/static/hoover/websocket.js: real-time state change notifications
- webui/static/hoover/vdom.js: VDOM improvements for keyed diff
- All frontend pages refactored to use html templates
- Add tests for state management and polling
- Update docs and AGENTS.md

webui/static/hoover/index.js

@@ -10,6 +10,9 @@ export { reactive, requestUpdate } from './reactivity.js?v=7';
 /* ── VDOM ────────────────────────────────────────────────────── */
 export { h } from './vdom.js?v=7';
 
+/* ── HTM ──────────────────────────────────────────────────────── */
+export { html } from './html.js?v=7';
+
 /* ── Render ──────────────────────────────────────────────────── */
 export { render } from './render.js?v=7';
 
@@ -38,7 +41,7 @@ export { PageHeader, renderGuard, renderGuardMulti, Tabs, SectionTitle, ActionGr
 export { Badge, StatusDot, Empty, Card, ConfirmDelete, Table, ActionButton, certStatusBadge, serviceStatusBadge, StatCard, StatusText, ServiceStatus, ActionCell, MonoText, ZoneSelect } from './components/data.js?v=7';
 
 /* ── UI Components: Modal ────────────────────────────────────── */
-export { openModal, closeModal, closeAllModals, formModal, MultiSelectModal, QuickModal } from './components/modal.js?v=7';
+export { openModal, closeModal, closeAllModals, modalVNodes, refreshModals, formModal, MultiSelectModal, QuickModal } from './components/modal.js?v=7';
 
 /* ── UI Components: Toast ────────────────────────────────────── */
 export { ToastContainer } from './components/toast.js?v=7';