chore(dashboard): remove SATCOM 'UPSTREAM: JAMMED' banner

The big red banner above the header (driven by /aip/entities polling)
fired on the dev box's baseline 'AIP not configured' state, so operators
saw it constantly and learned to ignore it. The signal value was
negative.

Drops:
- the JSX banner block in App.tsx
- aipConnected / aipLastError / aipEverConnectedRef state
- the 5s AIP-status polling useEffect that fed them
- the now-unused fetchAipEntities import (still used by AIPPanel.tsx)

The CSS rules (.satcom-banner*) are kept in place — harmless dead style,
will be reaped in a future css cleanup pass.

Author: kovtcharov

dashboard/src/App.tsx

@@ -3,7 +3,6 @@ import {
   acknowledgeInsight,
   confirmPending,
   dismissInsight,
-  fetchAipEntities,
   fetchInsights,
   fetchState,
   openInsightsStream,
@@ -205,19 +204,6 @@ export default function App() {
   const [streamLive, setStreamLive] = useState(false);
   const textareaRef = useRef<HTMLTextAreaElement | null>(null);
 
-  // SATCOM/upstream status — driven by polling /aip/entities. We track
-  // three conditions to decide whether to red-flag the banner:
-  //   - `aipConnected` — current connectivity (null until first probe).
-  //   - `aipLastError` — server-side last-error string. NULL means AIP is
-  //                      genuinely "not configured" (no AIP_BASE_URL),
-  //                      NOT a failure. Don't scream red in that case.
-  //   - `aipEverConnected` — sticky bit; once we've seen a healthy AIP,
-  //                          a subsequent disconnection IS jamming.
-  // Banner shows when (everConnected && !connected) OR (lastError set).
-  const [aipConnected, setAipConnected] = useState<boolean | null>(null);
-  const [aipLastError, setAipLastError] = useState<string | null>(null);
-  const aipEverConnectedRef = useRef(false);
-
   // Support strip toggle. Default closed so the primary view (queries +
   // insights + reasoning + pending) gets the full screen. Click "SHOW
   // DETAILS" to surface burndown / AIP / mesh / doctrine.
@@ -419,35 +405,6 @@ export default function App() {
     }
   }, []);
 
-  // SATCOM status poll — drives the red "UPSTREAM: JAMMED" banner. Runs
-  // every 5s, mirrors AIPPanel's cadence so the two surfaces stay
-  // coherent. Initial state is `null` (unknown) so the banner stays
-  // hidden until we have a real signal.
-  useEffect(() => {
-    let alive = true;
-    const tick = async () => {
-      try {
-        const res = await fetchAipEntities("Unit");
-        if (!alive) return;
-        setAipConnected(Boolean(res.connected));
-        setAipLastError(res.last_error ?? null);
-        if (res.connected) aipEverConnectedRef.current = true;
-      } catch (e) {
-        if (!alive) return;
-        // Real network failure (backend unreachable) — surface it.
-        console.warn("[beacon][app] aip status poll failed", e);
-        setAipConnected(false);
-        setAipLastError(e instanceof Error ? e.message : String(e));
-      }
-    };
-    void tick();
-    const id = window.setInterval(() => void tick(), 5000);
-    return () => {
-      alive = false;
-      window.clearInterval(id);
-    };
-  }, []);
-
   // Mesh panel toggle. Default collapsed — keeps polling off until the
   // operator intentionally opens it.
   const [meshPanelOpen, setMeshPanelOpen] = useState(false);
@@ -502,23 +459,6 @@ export default function App() {
         <MeshStatusChip onClick={onMeshChipClick} />
       </header>
 
-      {/* Show the SATCOM banner ONLY when AIP genuinely failed (sticky-on
-          after we'd seen it healthy, OR a real last-error string came back).
-          AIP being unconfigured (last_error === null) is NOT jamming — that's
-          the dev-machine baseline, and red-flagging it constantly trains
-          operators to ignore the banner when it actually matters. */}
-      {(aipEverConnectedRef.current && aipConnected === false) ||
-       (aipLastError !== null) ? (
-        <div className="satcom-banner" role="alert" aria-live="polite">
-          <span className="satcom-banner-headline mono">
-            UPSTREAM: JAMMED · MESH: HEALTHY
-          </span>
-          <span className="satcom-banner-sub">
-            Brigade still has the picture via mesh. AIP push queued.
-          </span>
-        </div>
-      ) : null}
-
       {/* Pending banner moved into the right "Actions" column. */}
       {false && state.pending.length > 0 ? (
         <section