refactor: modernize frontend with hoover framework components and docs

- Add quick modal, table, service status, and confirmation dialog components
- Refactor all pages (certs, dhcp, proxy, etc.) to use new component patterns
- Introduce refactor load utility and render guard for consistent UX
- Add hoover documentation and update AGENTS.md, architecture, overview

webui/static/hoover/index.js

@@ -5,37 +5,37 @@
  */
 
 /* ── Reactivity ──────────────────────────────────────────────── */
-export { reactive, requestUpdate } from './reactivity.js';
+export { reactive, requestUpdate } from './reactivity.js?v=6';
 
 /* ── VDOM ────────────────────────────────────────────────────── */
-export { h } from './vdom.js';
+export { h } from './vdom.js?v=6';
 
 /* ── Render ──────────────────────────────────────────────────── */
-export { render } from './render.js';
+export { render } from './render.js?v=6';
 
 /* ── Component ───────────────────────────────────────────────── */
-export { definePage, hComp } from './component.js';
+export { definePage, hComp } from './component.js?v=6';
 
 /* ── Router ──────────────────────────────────────────────────── */
-export { createRouter, Link } from './router.js';
+export { createRouter, Link } from './router.js?v=6';
 
 /* ── WebSocket ───────────────────────────────────────────────── */
-export { connect, onMessage } from './websocket.js';
+export { connect, onMessage } from './websocket.js?v=6';
 
 /* ── API & Toast ─────────────────────────────────────────────── */
-export { apiFetch, toast, dismissToast } from './api.js';
+export { apiFetch, toast, dismissToast, apiSubmit, refactorLoad, checkAbort, poll } from './api.js?v=6';
 
 /* ── Helpers ─────────────────────────────────────────────────── */
-export { esc, att_esc, enc, $val, parseZones } from './helpers.js';
+export { esc, att_esc, enc, $val, parseZones, downloadBlob } from './helpers.js?v=6';
 
 /* ── UI Components: Layout ───────────────────────────────────── */
-export { PageHeader } from './components/layout.js';
+export { PageHeader, renderGuard, Tabs, SectionTitle, ActionGroup, DataTableSection } from './components/layout.js?v=6';
 
 /* ── UI Components: Data ─────────────────────────────────────── */
-export { Badge, StatusDot, Empty, Card } from './components/data.js';
+export { Badge, StatusDot, Empty, Card, ConfirmDelete, Table, ActionButton, certStatusBadge, serviceStatusBadge, StatCard, StatusText, ServiceStatus, ActionCell, MonoText, ZoneSelect } from './components/data.js?v=6';
 
 /* ── UI Components: Modal ────────────────────────────────────── */
-export { openModal, closeModal, closeAllModals, formModal } from './components/modal.js';
+export { openModal, closeModal, closeAllModals, formModal, MultiSelectModal, QuickModal } from './components/modal.js?v=6';
 
 /* ── UI Components: Toast ────────────────────────────────────── */
-export { ToastContainer } from './components/toast.js';
+export { ToastContainer } from './components/toast.js?v=6';