[fix](trx-frontend-http): show map loading message, sync active rig marker, align recorder actions with bookmarks

- Display "Loading map…" placeholder on first map tab click while
  map-core.js is still loading; hide it once the module initializes.
- Sync receiver marker highlight when switching rigs so the map
  reflects the currently active rig immediately.
- Add "Actions" header to recorder files table and match button
  sizing to bookmarks table style.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -3850,6 +3850,7 @@ async function switchRigFromSelect(selectEl) {
   if (typeof setSchedulerRig === "function") setSchedulerRig(lastActiveRigId);
   if (typeof setBackgroundDecodeRig === "function") setBackgroundDecodeRig(lastActiveRigId);
   if (typeof bmFetch === "function") bmFetch(document.getElementById("bm-category-filter")?.value || "");
+  window.trx.map?.syncAprsReceiverMarker();
   // Switch this session's rig and reconnect SSE to the new rig's
   // state channel.
   try {
@@ -4450,9 +4451,15 @@ function navigateToTab(name, options = {}) {
   scheduleSpectrumLayout();
   if (typeof window.loadPluginsForTab === "function") window.loadPluginsForTab(name);
   if (name === "map") {
-    window.trx.map?.initAprsMap();
-    window.trx.map?.sizeAprsMapToViewport();
-    if (window.trx.map?.aprsMap) setTimeout(() => window.trx.map.aprsMap.invalidateSize(), 50);
+    const loadingEl = document.getElementById("map-loading");
+    if (window.trx.map) {
+      if (loadingEl) loadingEl.style.display = "none";
+      window.trx.map.initAprsMap();
+      window.trx.map.sizeAprsMapToViewport();
+      if (window.trx.map.aprsMap) setTimeout(() => window.trx.map.aprsMap.invalidateSize(), 50);
+    } else if (loadingEl) {
+      loadingEl.style.display = "";
+    }
   }
   if (name === "statistics") {
     window.trx.map?.scheduleStatsRender();
@@ -5833,7 +5840,7 @@ function renderRecorderFiles() {
     return;
   }
 
-  let html = '<table class="recorder-table"><thead><tr><th>File</th><th>Size</th><th></th></tr></thead><tbody>';
+  let html = '<table class="recorder-table"><thead><tr><th>File</th><th>Size</th><th>Actions</th></tr></thead><tbody>';
   for (const f of page) {
     const safeName = escapeMapHtml(f.name);
     const encodedName = encodeURIComponent(f.name);

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

@@ -977,6 +977,7 @@
       </div>
     </div>
     <div id="tab-map" class="tab-panel" data-tab="map" style="display:none;">
+      <div id="map-loading" class="map-loading-msg">Loading map&hellip;</div>
       <template id="tmpl-map">
       <div id="map-stage">
         <div class="map-overlay-panel">

src/trx-client/trx-frontend/trx-frontend-http/assets/web/map-core.js

@@ -3428,6 +3428,8 @@
   function autoInitIfVisible() {
     const panel = document.getElementById("tab-map");
     if (panel && panel.style.display !== "none") {
+      const loadingEl = document.getElementById("map-loading");
+      if (loadingEl) loadingEl.style.display = "none";
       initAprsMap();
       sizeAprsMapToViewport();
       if (aprsMap) setTimeout(() => aprsMap.invalidateSize(), 50);

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

@@ -1263,7 +1263,6 @@ small { color: var(--text-muted); }
   box-sizing: border-box;
   margin: 0;
   padding: 0.2rem 0.5rem;
-  height: 1.65rem;
   font-size: 0.78rem;
   font-family: inherit;
   line-height: 1.4;
@@ -1274,7 +1273,6 @@ small { color: var(--text-muted); }
   background: var(--btn-bg);
   color: var(--text);
   cursor: pointer;
-  transition: background-color 100ms ease, border-color 100ms ease, color 100ms ease, box-shadow 100ms ease;
 }
 .recorder-table .rec-file-btn:hover { background: color-mix(in srgb, var(--btn-bg) 75%, var(--accent-green)); border-color: color-mix(in srgb, var(--btn-border) 60%, var(--accent-green)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent-green) 18%, transparent); }
 .recorder-table .rec-file-btn:active { background: color-mix(in srgb, var(--btn-bg) 55%, var(--accent-green)); border-color: var(--accent-green); box-shadow: none; transform: translateY(1px); }
@@ -1704,6 +1702,15 @@ small { color: var(--text-muted); }
   min-height: 0;
   gap: 0.85rem;
 }
+.map-loading-msg {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 60vh;
+  font-size: 1.1rem;
+  color: var(--text-secondary);
+  opacity: 0.8;
+}
 #map-stage {
   position: relative;
   flex: 0 1 auto;