swarm.js: drop the queue-summary banner rather than ship it on an interim jobq fetch

mara, on the already-approved PR: "dont replace one legacy thing with
another. then we will have to either wait with this pr or split it
into what can and cannot be done now."

Splitting: the transients-only per-agent badge fix is real, correct,
and fixes a live regression (the old DagView fields it read no longer
exist) — nothing about it depends on job-queue data at all, so it
ships as-is. The queue-summary banner is the part that doesn't belong
in this shape: it was reading GET /api/jobq/graph directly and
deriving counts client-side as an interim stand-in for the dedicated
rollup endpoint mara separately asked for — exactly the kind of
stopgap-on-a-stopgap her comment is calling out, since the endpoint
that should serve it doesn't exist on main yet.

Removes jobqNodesState, refreshJobqGraph(), the rebuild_queue_changed
SSE subscription, and the banner's render block from swarm.js/tabs.js
entirely — swarm.js now reads no job-queue state of any kind, fully
satisfying "swarm.js should not need to pull in the jobq to do its
job." The banner comes back once the rollup endpoint
(hyperhive#2985's follow-up) exists, reading that directly instead of
the full graph. Until then the per-agent transient pills still show
what's actually running on each card; only the hive-wide "N running /
M queued" summary line is temporarily gone.

CSS classes for the banner (.queue-summary/.queue-summary-link) kept
in dashboard.css rather than deleted-then-restored — commented as
currently unused, expected to come back unchanged.

docs/web-ui/dashboard.md updated to match (Container-row pending-
badge section, the removed Build-queue-summary-banner section, and
the BU1LDS-page note that used to describe SW4RM's now-removed
parallel fetch).

frontend/packages/dashboard/src/tabs.js

@@ -42,8 +42,8 @@ import {
   renderQuestions, activeQuestionCount,
 } from './call.js';
 import {
-  refreshJobqGraph, syncTransientsFromSnapshot,
-  applyRebuildQueueChanged, applyContainerStateChanged, applyContainerRemoved,
+  syncTransientsFromSnapshot,
+  applyContainerStateChanged, applyContainerRemoved,
   applyTransientSet, applyTransientCleared,
   renderContainers, renderContainersFromState,
   renderSelectionBar, renderPeerHives,
@@ -234,15 +234,6 @@ window.marked = marked;
       // `transientsState` + `containersState`, not from `s.*`).
       syncTransientsFromSnapshot(s);
       syncContainersFromSnapshot(s);
-      // Job-queue graph feeds only the SW4RM queue-summary banner now
-      // (per-agent card badges are transient-only — see swarm.js); its
-      // own detailed view lives on /builds.html. Self-fetches GET
-      // /api/jobq/graph — not read off `s` (this page's snapshot
-      // carries no jobq field) — fire-and-forget: renderContainers
-      // below runs off whatever jobqNodesState already holds, and
-      // refreshJobqGraph's own re-render catches up once the fetch
-      // resolves.
-      refreshJobqGraph();
       renderContainers(s);
       // Sync the derived approvals + questions stores from the
       // snapshot, then render. Live `*_added` / `*_resolved` events
@@ -313,10 +304,10 @@ window.marked = marked;
     container_removed:       applyContainerRemoved,
     // tombstones_changed / meta_inputs_changed / meta_update_running are
     // handled on /core.html now (the SYST3M panels moved there).
-    // rebuild_queue_changed stays: it refreshes the SW4RM queue-summary
-    // banner (see swarm.js — the per-agent badges it fed too, before
-    // mara's "only show what is running" ask, are transient-only now).
-    rebuild_queue_changed:   applyRebuildQueueChanged,
+    // rebuild_queue_changed: this page no longer subscribes to it at
+    // all (see swarm.js's transients-section comment) — the SW4RM tab
+    // has nothing left that reads it, unlike /builds.html which still
+    // does (its own separate subscription).
     schedules_changed:       applySchedulesChanged,
     capabilities_changed:    applyCapabilitiesChanged,
     tool_groups_changed:     applyToolGroupsChanged,
@@ -338,7 +329,7 @@ window.marked = marked;
     const es = openStream(
       '/api/dashboard/stream?kinds=sent,approval_added,approval_resolved,' +
         'question_added,question_resolved,transient_set,transient_cleared,' +
-        'container_state_changed,container_removed,rebuild_queue_changed,' +
+        'container_state_changed,container_removed,' +
         'schedules_changed,capabilities_changed,tool_groups_changed',
     );
     es.onmessage = (e) => {