[fix](trx-rs): frost main view on trx-server disconnect

Nudge state watch when server_connected goes false so SSE delivers the change. Frontend applies a desaturated frost + banner instead of a blocking overlay, keeping the last-known state visible.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/src/remote_client.rs

@@ -109,6 +109,8 @@ pub async fn run_remote_client(
                     warn!("Remote connection dropped: {}", e);
                 }
                 config.server_connected.store(false, Ordering::Relaxed);
+                // Nudge the state watch so SSE clients see server_connected=false.
+                state_tx.send_modify(|_| {});
             }
             Ok(Err(e)) => {
                 warn!("Remote connect failed: {}", e);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js

@@ -3381,6 +3381,8 @@ function connect() {
   lastEventAt = Date.now();
   es.onopen = () => {
     setConnLostOverlay(false);
+    const tm = document.getElementById("tab-main");
+    if (tm) tm.classList.remove("server-disconnected");
     if (!aboutUptimeStart) aboutUptimeStart = Date.now();
     pollFreshSnapshot();
     refreshRigList();
@@ -3392,11 +3394,12 @@ function connect() {
       lastRendered = evt.data;
       render(data);
       lastEventAt = Date.now();
+      const tabMain = document.getElementById("tab-main");
       if (data.server_connected === false) {
         powerHint.textContent = "trx-server connection lost";
-        setConnLostOverlay(true, "trx-server connection lost", "trx-client is running but cannot reach the radio server");
+        if (tabMain) tabMain.classList.add("server-disconnected");
       } else {
-        setConnLostOverlay(false);
+        if (tabMain) tabMain.classList.remove("server-disconnected");
         if (data.initialized) powerHint.textContent = readyText();
       }
     } catch (e) {

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -96,6 +96,7 @@
       <div id="auth-role" style="margin-top: 1rem; color: var(--text-muted); font-size: 0.85rem; display: none;"></div>
     </div>
     <div id="tab-main" class="tab-panel">
+    <div id="server-lost-banner" aria-live="assertive"><span class="banner-dot"></span>trx-server connection lost — waiting for reconnect</div>
     <div id="loading" style="text-align:center; padding:2rem 0;">
       <div id="loading-title" style="margin-bottom:0.4rem; font-size:1.1rem; font-weight:600;">Initializing (rig)…</div>
       <div id="loading-sub" style="color:#9aa4b5;"></div>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -1431,6 +1431,39 @@ small { color: var(--text-muted); }
   position: fixed;
   border-radius: 0;
 }
+#server-lost-banner {
+  display: none;
+  align-items: center;
+  justify-content: center;
+  gap: 0.5rem;
+  padding: 0.45rem 0.75rem;
+  background: color-mix(in srgb, var(--accent-red) 18%, var(--card-bg));
+  border: 1px solid color-mix(in srgb, var(--accent-red) 40%, var(--border));
+  border-radius: 0.4rem;
+  color: var(--accent-red);
+  font-size: 0.82rem;
+  font-weight: 600;
+  margin-bottom: 0.5rem;
+}
+#server-lost-banner .banner-dot {
+  width: 7px; height: 7px; border-radius: 50%;
+  background: var(--accent-red);
+  animation: banner-pulse 1.5s ease-in-out infinite;
+}
+@keyframes banner-pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.3; }
+}
+#tab-main.server-disconnected #content {
+  pointer-events: none;
+  filter: saturate(0.3) brightness(0.7);
+  opacity: 0.55;
+  transition: filter 0.4s ease, opacity 0.4s ease;
+}
+#tab-main.server-disconnected #server-lost-banner { display: flex; }
+#tab-main:not(.server-disconnected) #content {
+  transition: filter 0.3s ease, opacity 0.3s ease;
+}
 .decode-history-overlay-card {
   min-width: min(26rem, calc(100vw - 2.4rem));
   max-width: min(30rem, calc(100vw - 2.4rem));