dashboard: remove peer-hives headline block (hyperhive#3294)

Removes the SW4RM tab's "P33R H1V3S" headline section
(#peers-block/#peers-section in dashboard.html, renderPeerHives in
swarm.js, its call site + import in tabs.js). Superseded by swarm-ui's
own hive roster page.

Verified: npm run build clean (would have failed to resolve
renderPeerHives if the import/export pair were left mismatched).

frontend/packages/dashboard/src/dashboard.html

@@ -100,15 +100,6 @@
       <div id="containers-section">
         <p class="meta">loading…</p>
       </div>
-      <!-- Peer hives (federated swarms). The headline block is hidden
-           entirely when nothing is federated; renderPeerHives then drops
-           a quiet "no peer hives configured" note into #peers-section. -->
-      <div id="peers-block" hidden>
-        <h2>◆ P33R H1V3S ◆</h2>
-        <div class="divider">══════════════════════════════════════════════════════════════</div>
-        <p class="meta">peer hives in this swarm. click a card to open that hive's dashboard.</p>
-      </div>
-      <div id="peers-section"></div>
     </section>
 
     <!-- Y3R C4LL: things blocked on operator decision. Approvals +

frontend/packages/dashboard/src/swarm.js

@@ -1,6 +1,6 @@
 // SW4RM (containers) domain — extracted from tabs.js.
-// Agent topology, container-row rendering, selection bar, peer-hives block,
-// and all live-update apply handlers for container-state, transient, and
+// Agent topology, container-row rendering, selection bar, and all
+// live-update apply handlers for container-state, transient, and
 // job-queue-rollup ops. See docs/web-ui.md::Container row for the
 // rendering contract.
 
@@ -1049,43 +1049,6 @@ function addBulkButton(parent, btnClass, label, enabled, selected, opts) {
   parent.append(btn);
 }
 
-// ─── peer hives ──────────────────────────────────────────────────────────────
-
-// Peer hives: render link cards as a headline section under SW4RM
-// (state.peer_hives). Called on every state refresh. When nothing is
-// federated, the "P33R H1V3S" headline block is hidden entirely and a
-// quiet grey note replaces the cards.
-export function renderPeerHives(peers) {
-  const block = $('peers-block');
-  const root = $('peers-section');
-  if (!root) return;
-  root.replaceChildren();
-  const hasPeers = Array.isArray(peers) && peers.length > 0;
-  if (block) block.hidden = !hasPeers;
-  if (!hasPeers) {
-    root.append(el('p', { class: 'empty' }, 'no peer hives configured'));
-    return;
-  }
-  const ul = el('ul', { class: 'containers' });
-  for (const p of peers) {
-    const li = el('li', { class: 'container-row' });
-    const head = el('div', { class: 'head' });
-    const icon = el('span', { class: 'container-icon' }, '⬡');
-    const nameEl = el('span', { class: 'name' }, p.name || p.url);
-    const linkEl = el('a', {
-      href: p.url,
-      target: '_blank',
-      rel: 'noopener noreferrer',
-      class: 'meta',
-      title: 'open ' + p.name + ' dashboard',
-    }, p.url);
-    head.append(icon, nameEl);
-    li.append(head, el('div', { class: 'meta' }, linkEl));
-    ul.append(li);
-  }
-  root.append(ul);
-}
-
 // ─── tickers ─────────────────────────────────────────────────────────────────
 
 // 30s ticker for agent status-age chips. Renderers stamp `data-set-at`

frontend/packages/dashboard/src/tabs.js

@@ -46,7 +46,7 @@ import {
   applyRebuildQueueChanged, applyContainerStateChanged, applyContainerRemoved,
   applyTransientSet, applyTransientCleared,
   renderContainers, renderContainersFromState,
-  renderSelectionBar, renderPeerHives,
+  renderSelectionBar,
 } from './swarm.js';
 
 // mdNode (in common.js) reads `window.marked` for the markdown side
@@ -201,9 +201,6 @@ window.marked = marked;
       // synchronous read (e.g. the compose autocomplete pulls agent
       // names from here instead of refetching on every keystroke).
       window.__hyperhive_state = s;
-      // Peer hives render as a headline section under SW4RM (no longer
-      // a tab); renderPeerHives shows/hides its own headline block.
-      renderPeerHives(s.peer_hives || []);
       renderServerWarnings(s.server_warnings);
       // (The M4TR1X surface is reachable from the H0M3 hub now, not the
       // dashboard tab strip — home.js gates its tile on matrix_gui_enabled.)