[feat](trx-frontend-http): one navigation model at every width

Eight destinations sat flat in the tab strip with equal weight, competing
with the controls for the same row and then scrolling out of reach with
only a fade to say so.  They are not equal: Radio is where an operator
spends nearly all their time, Bookmarks, Digital modes and Map are
operating surfaces, and Statistics, Recorder, Settings and About are
occasional.

The mobile layout already grouped them exactly that way, behind its More
menu, so the application carried two navigation models.  Adopt the mobile
grouping at every width instead of adding a third: four operating tabs
plus More.  The strip no longer scrolls at any width, and the menu keeps
its bottom-sheet placement on mobile while anchoring under its button
elsewhere.

Drop the labels between 701 and 1180px so the tabs degrade to their icons
— which every tab already carries — before the strip could ever need to
hide a destination.

Rename Main to Radio: it is the receiver, not a generic first page, and
the name now says what the destination is rather than where it sits.

Freeing that width also let the style picker and theme toggle return to
the bar inline, leaving only the layout picker in the overflow menu.

Navigating to About in the browser smoke test now goes through More, as a
person would.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GdyUjuXejCEfiub675z6cz
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -637,6 +637,22 @@ function elementById(id) {
   };
   const layoutCapabilities = { broadcast: false, digital: false };
   let activeRigId = null;
+  const layoutSections = [
+    { id: "advanced-radio-controls", key: "advanced" },
+    { id: "audio-controls", key: "audio" },
+    { id: "scheduler-controls", key: "scheduler" }
+  ];
+  const seededSections = /* @__PURE__ */ new Set();
+  let appliedLayoutName = null;
+  function seedLayoutSections(layout, layoutChanged) {
+    layoutSections.forEach(({ id, key }) => {
+      const section = document.getElementById(id);
+      if (!section) return;
+      if (!layoutChanged && seededSections.has(id)) return;
+      seededSections.add(id);
+      section.open = layout[key];
+    });
+  }
   function layoutStorageKey() {
     return activeRigId ? `trxOperatorLayout:${activeRigId}` : "trxOperatorLayout";
   }
@@ -690,12 +706,9 @@ function elementById(id) {
     const layout = layouts[permittedName];
     document.body.dataset.operatorLayout = permittedName in layouts ? permittedName : "compact";
     if (options.persist !== false) localStorage.setItem(layoutStorageKey(), permittedName);
-    const details = document.getElementById("advanced-radio-controls");
-    if (details) details.open = layout.advanced;
-    const audioDetails = document.getElementById("audio-controls");
-    if (audioDetails) audioDetails.open = layout.audio;
-    const schedulerDetails = document.getElementById("scheduler-controls");
-    if (schedulerDetails) schedulerDetails.open = layout.scheduler;
+    const layoutChanged = appliedLayoutName !== permittedName;
+    appliedLayoutName = permittedName;
+    seedLayoutSections(layout, layoutChanged);
     if (options.navigate && typeof browserWindow.navigateToTab === "function") {
       browserWindow.navigateToTab(layout.preferredTab);
     }
@@ -734,6 +747,71 @@ function elementById(id) {
       api.applyLayout(savedLayoutName(), { persist: false });
     }
   }
+  const overflowOrder = [".operator-layout-picker", ".header-style-pick", "#theme-toggle"];
+  function installTopBarOverflow() {
+    const actions = document.querySelector(".top-bar-actions");
+    if (!actions || document.getElementById("top-bar-more")) return;
+    const wrap = document.createElement("div");
+    wrap.id = "top-bar-more";
+    wrap.className = "top-bar-more";
+    const button = document.createElement("button");
+    button.type = "button";
+    button.id = "top-bar-more-btn";
+    button.className = "header-bar-btn top-bar-more-btn";
+    button.textContent = "⋯";
+    button.setAttribute("aria-haspopup", "menu");
+    button.setAttribute("aria-expanded", "false");
+    button.setAttribute("aria-label", "More controls");
+    button.title = "More controls";
+    const menu = document.createElement("div");
+    menu.id = "top-bar-more-menu";
+    menu.className = "top-bar-more-menu";
+    menu.setAttribute("role", "menu");
+    button.setAttribute("aria-controls", menu.id);
+    wrap.append(button, menu);
+    actions.appendChild(wrap);
+    const closeMenu = () => {
+      menu.classList.remove("is-open");
+      button.setAttribute("aria-expanded", "false");
+    };
+    button.addEventListener("click", () => {
+      const open = menu.classList.toggle("is-open");
+      button.setAttribute("aria-expanded", String(open));
+    });
+    document.addEventListener("click", (event) => {
+      if (!(event.target instanceof Node) || !wrap.contains(event.target)) closeMenu();
+    });
+    document.addEventListener("keydown", (event) => {
+      if (event.key === "Escape") closeMenu();
+    });
+    const barFits = () => {
+      const bar = actions.closest(".tab-bar");
+      if (!bar) return true;
+      const identity = bar.querySelector(".header-main");
+      const nav = bar.querySelector(".tab-bar-nav");
+      const gutters = 48;
+      const needed = (identity?.offsetWidth ?? 0) + (nav?.scrollWidth ?? 0) + actions.scrollWidth + gutters;
+      return needed <= bar.clientWidth;
+    };
+    const reflowOverflow = () => {
+      overflowOrder.forEach((selector) => {
+        const element = menu.querySelector(selector);
+        if (element) actions.insertBefore(element, wrap);
+      });
+      wrap.hidden = true;
+      for (const selector of overflowOrder) {
+        if (barFits()) break;
+        const element = actions.querySelector(selector);
+        if (!element) continue;
+        wrap.hidden = false;
+        menu.appendChild(element);
+      }
+      wrap.hidden = menu.children.length === 0;
+      if (wrap.hidden) closeMenu();
+    };
+    reflowOverflow();
+    window.addEventListener("resize", reflowOverflow);
+  }
   function installMobileMore() {
     const nav = document.querySelector(".tab-bar-nav");
     if (!nav || document.getElementById("mobile-more-btn")) return;
@@ -840,6 +918,7 @@ function elementById(id) {
   api.init = function init() {
     ensureLiveRegions();
     installLayoutControls();
+    installTopBarOverflow();
     installMobileMore();
     installDecoderPicker();
     installDecoderBadges();
@@ -1934,7 +2013,6 @@ var signalSplitValueEl = document.getElementById("signal-split-value");
 var overviewPeakHoldEl = document.getElementById("overview-peak-hold");
 var themeToggleBtn = document.getElementById("theme-toggle");
 var headerRigSwitchSelect = document.getElementById("header-rig-switch-select");
-var headerRigSummary = document.getElementById("header-rig-summary");
 var headerStylePickSelect = document.getElementById("header-style-pick-select");
 var rdsPsOverlay = document.getElementById("rds-ps-overlay");
 var tabMainEl = document.getElementById("tab-main");
@@ -2651,19 +2729,6 @@ function populateRigPicker(selectEl, rigIds, activeRigId, disabled) {
   }
   selectEl.disabled = disabled;
 }
-function updateRigIdentitySummary(rigId, pending = false) {
-  if (!headerRigSummary) return;
-  const rig = serverRigs.find((entry) => entry?.remote === rigId);
-  if (!rig) {
-    headerRigSummary.textContent = pending ? "Switching rigs…" : "No rig details available";
-    return;
-  }
-  const hardware = [rig.manufacturer, rig.model].map((value) => String(value || "").trim()).filter(Boolean).join(" ") || rig.remote;
-  const modes = Array.isArray(rig.supported_modes) ? rig.supported_modes.map(normalizeMode).filter(Boolean) : [];
-  const features = [rig.tx ? "TX" : "RX", rig.filter_controls ? "SDR filters" : null, ...modes.slice(0, 5)];
-  if (modes.length > 5) features.push(`+${modes.length - 5} modes`);
-  headerRigSummary.textContent = `${pending ? "Switching to " : ""}${hardware} · ${features.filter(Boolean).join(" · ")}`;
-}
 function updateRigSubtitle(activeRigId) {
   if (!rigSubtitle) return;
   const name = activeRigId && lastRigDisplayNames[activeRigId] || activeRigId || "--";
@@ -2694,7 +2759,6 @@ function applyRigList(activeRigId, rigIds, displayNames = {}) {
   const disableSwitch = lastRigIds.length === 0 || !authRole || authRole === "rx";
   populateRigPicker(headerRigSwitchSelect, lastRigIds, lastActiveRigId, disableSwitch);
   updateRigSubtitle(lastActiveRigId);
-  updateRigIdentitySummary(lastActiveRigId);
   window.trxUi?.setActiveRig(lastActiveRigId);
   if (rigListChanged) {
     window.trx.modules.scheduler?.setRig(lastActiveRigId);
@@ -4955,7 +5019,7 @@ async function switchRigFromSelect(selectEl) {
   rigSwitchInProgress = true;
   setControlPending(selectEl, true);
   selectEl.closest(".header-rig-switch")?.classList.add("is-switching");
-  updateRigIdentitySummary(nextRig, true);
+  showHint(`Switching to ${lastRigDisplayNames[nextRig] || nextRig}…`);
   showHint(`Switching to ${lastRigDisplayNames[nextRig] || nextRig}…`);
   try {
     const sidParam = sseSessionId ? `&session_id=${encodeURIComponent(sseSessionId)}` : "";
@@ -4963,7 +5027,6 @@ async function switchRigFromSelect(selectEl) {
     lastActiveRigId = nextRig;
     resetDecoderStateOnRigSwitch();
     updateRigSubtitle(lastActiveRigId);
-    updateRigIdentitySummary(lastActiveRigId);
     window.trxUi?.setActiveRig(lastActiveRigId);
     window.trx.modules.scheduler?.setRig(lastActiveRigId);
     window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
@@ -4982,7 +5045,6 @@ async function switchRigFromSelect(selectEl) {
   } catch (err) {
     console.error("select_rig failed:", err);
     selectEl.value = prevRig || "";
-    updateRigIdentitySummary(prevRig);
     window.trxUi?.notify("Rig could not be switched", { kind: "error" });
   } finally {
     rigSwitchInProgress = false;

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

@@ -46,7 +46,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <div class="tab-bar-nav" aria-label="Primary navigation">
           <button class="tab active" data-tab="main">
             <svg class="tab-icon" aria-hidden="true"><use href="#icon-home"/></svg>
-            <span class="tab-label">Main</span>
+            <span class="tab-label">Radio</span>
           </button>
           <button class="tab" data-tab="bookmarks">
             <svg class="tab-icon" aria-hidden="true"><use href="#icon-bookmark"/></svg>
@@ -85,7 +85,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <button id="header-rec-btn" class="header-bar-btn header-rec-btn" type="button" aria-label="Toggle recording" title="Toggle recording">REC</button>
         <div class="header-rig-switch">
           <select id="header-rig-switch-select" aria-label="Select active rig"></select>
-          <span id="header-rig-summary" class="header-rig-summary" aria-live="polite"></span>
         </div>
         <div class="header-style-pick">
           <select id="header-style-pick-select" aria-label="Select UI style">

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

@@ -1229,12 +1229,20 @@ small { color: var(--text-muted); }
   gap: 0;
   flex-shrink: 0;
 }
+/* One row, always.  Controls that do not fit are moved into the overflow menu
+ * by ui-core rather than wrapping: wrapping made the header's height depend on
+ * the viewport width in a way that was not even monotonic (112px at 1440,
+ * 169px at 1100, 131px at 900), which is what made the bar feel unstable. */
 .top-bar-actions {
   display: flex;
-  align-items: flex-start;
-  gap: 0.45rem 0.6rem;
+  align-items: center;
+  gap: 0.4rem;
   min-width: 0;
-  flex-wrap: wrap;
+  flex-wrap: nowrap;
+}
+/* Every control in the bar is the same height and none of them stretch. */
+.top-bar-actions > * {
+  flex: 0 0 auto;
 }
 .header-bar-btn.header-audio-btn {
   width: 2rem;
@@ -1403,21 +1411,13 @@ small { color: var(--text-muted); }
   gap: 0.8rem;
   padding: 0.9rem 0.2rem 0;
 }
+/* Inline, not stacked: the summary used to sit under the select, making this
+ * the only 54px control in a bar of 32px ones. */
 .header-rig-switch {
-  display: grid;
-  grid-template-columns: minmax(0, 1fr);
-  align-items: start;
-  gap: 0.35rem;
-}
-.header-rig-summary {
-  display: block;
-  max-width: 20rem;
-  color: var(--text-muted);
-  font-size: var(--fs-xs);
-  line-height: 1.35;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  display: flex;
+  align-items: center;
+  gap: 0.4rem;
+  min-width: 0;
 }
 .header-rig-switch select {
   min-width: 8rem;
@@ -1531,7 +1531,32 @@ small { color: var(--text-muted); }
   align-items: center;
   gap: 0.2rem;
   min-width: 0;
-  flex-wrap: wrap;
+  /* Scroll rather than wrap: eight labels wrapped into a ragged block (four
+   * rows at 1100px) and made the header's height depend on the viewport. */
+  flex-wrap: nowrap;
+  overflow-x: auto;
+  scrollbar-width: thin;
+}
+/* Fade the trailing edge so a tab scrolled out of view reads as "there is more"
+ * rather than as a label cut mid-word.  A mask rather than a colour-matched
+ * cover gradient: the card is transparent, so a cover would have to track the
+ * page background across both themes and all nine styles.  Only the trailing
+ * edge is faded, so the first tab stays crisp when the strip is at rest. */
+.tab-bar-nav {
+  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 2rem), transparent 100%);
+  mask-image: linear-gradient(to right, #000 calc(100% - 2rem), transparent 100%);
+}
+.tab-bar-nav::-webkit-scrollbar { height: 3px; }
+.tab-bar-nav::-webkit-scrollbar-thumb {
+  border-radius: 3px;
+  background: color-mix(in srgb, var(--border-light) 70%, transparent);
+}
+.tab-bar-nav .tab { flex: 0 0 auto; }
+/* Icons before scrolling: every tab already carries one, and four icons plus
+ * More always fit, so the strip never has to hide a destination. */
+@media (max-width: 1180px) and (min-width: 701px) {
+  .tab-bar-nav .tab .tab-label { display: none; }
+  .tab-bar-nav .tab { padding: 0.5rem 0.6rem; }
 }
 .tab {
   background: transparent;
@@ -2964,7 +2989,10 @@ button.is-active {
   text-transform: uppercase;
   overflow: visible;
 }
-.operator-layout-picker::before { content: "Layout"; }
+/* The prefix made the least-used control the widest in the bar; the
+ * select carries its own aria-label and title instead. */
+.operator-layout-picker { padding-left: 0; }
+.operator-layout-picker select { max-width: 8rem; }
 .operator-layout-picker select {
   width: auto;
   min-height: 2rem;
@@ -3060,9 +3088,22 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   body[data-operator-layout="broadcast"] .controls-row { grid-template-columns: 1fr auto; }
   body[data-operator-layout="broadcast"] #wfm-controls-col { grid-column: 1 / -1; }
 }
-.mobile-more-btn, .mobile-more-menu, .decoder-tab-select { display: none; }
+/* One navigation model at every width.  Statistics, Recorder, Settings and
+ * About are occasional destinations: they live behind More rather than
+ * competing with the operating tabs for the row and then scrolling out of
+ * reach.  The mobile layout already grouped them this way; the desktop strip
+ * now matches it, which is why the tab strip no longer needs to scroll. */
+.tab-bar-nav .tab[data-tab="statistics"],
+.tab-bar-nav .tab[data-tab="recorder"],
+.tab-bar-nav .tab[data-tab="settings"],
+.tab-bar-nav .tab[data-tab="about"] { display: none; }
+.mobile-more-btn { display: flex; flex: 0 0 auto; }
+.mobile-more-menu, .decoder-tab-select { display: none; }
+.tab-bar-nav { position: relative; }
 .mobile-more-menu {
-  position: fixed;
+  position: absolute;
+  top: calc(100% + 0.4rem);
+  right: 0;
   right: max(0.75rem, env(safe-area-inset-right));
   bottom: calc(5.4rem + env(safe-area-inset-bottom));
   z-index: 80;
@@ -3259,6 +3300,12 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   .tab[data-tab="statistics"], .tab[data-tab="recorder"],
   .tab[data-tab="settings"], .tab[data-tab="about"] { display: none; }
   .mobile-more-btn { display: flex; }
+  .mobile-more-menu {
+    position: fixed;
+    top: auto;
+    right: max(0.75rem, env(safe-area-inset-right));
+    bottom: calc(5.4rem + env(safe-area-inset-bottom));
+  }
   .mobile-more-btn[aria-expanded="true"] {
     color: var(--accent-text);
     background: color-mix(in srgb, var(--accent-green) 10%, transparent);
@@ -3282,24 +3329,24 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   .toast-region { bottom: calc(5.7rem + env(safe-area-inset-bottom)); }
   .top-bar-actions {
     width: 100%;
-    justify-content: flex-start;
-    flex-wrap: wrap;
-    gap: 0.45rem;
+    justify-content: flex-end;
+    flex-wrap: nowrap;
+    gap: 0.4rem;
   }
   .operator-layout-picker { max-width: 100%; }
   .operator-layout-picker select { max-width: 10rem; }
   .header-rig-switch,
   .header-style-pick {
-    flex: 1 1 12rem;
+    flex: 0 0 auto;
     min-width: 0;
   }
   .header-rig-switch select,
   .header-style-pick select {
-    width: 100%;
+    width: auto;
     min-width: 0;
   }
   .header-bar-btn {
-    flex: 1 1 calc(50% - 0.3rem);
+    flex: 0 0 auto;
     min-width: 0;
   }
   #tab-main,
@@ -5379,3 +5426,34 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
     font-size: max(0.75rem, 12px);
   }
 }
+
+
+/* --- Top bar overflow menu ------------------------------------------------ */
+.top-bar-more { position: relative; }
+.top-bar-more[hidden] { display: none; }
+.top-bar-more-btn {
+  width: 2rem;
+  height: 2rem;
+  min-height: 2rem;
+  padding: 0;
+  font-size: 1rem;
+  line-height: 1;
+}
+.top-bar-more-menu {
+  position: absolute;
+  top: calc(100% + 0.35rem);
+  right: 0;
+  z-index: 40;
+  display: none;
+  flex-direction: column;
+  gap: 0.4rem;
+  min-width: 12rem;
+  padding: 0.5rem;
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-md);
+  background: var(--surface);
+  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
+}
+.top-bar-more-menu.is-open { display: flex; }
+.top-bar-more-menu > * { width: 100%; }
+.top-bar-more-menu select { width: 100%; max-width: none; }

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/app.ts

@@ -724,7 +724,6 @@ const signalSplitValueEl = document.getElementById("signal-split-value");
 const overviewPeakHoldEl = document.getElementById("overview-peak-hold") as HTMLInputElement | null;
 const themeToggleBtn = document.getElementById("theme-toggle") as HTMLButtonElement | null;
 const headerRigSwitchSelect = document.getElementById("header-rig-switch-select") as HTMLSelectElement | null;
-const headerRigSummary = document.getElementById("header-rig-summary");
 const headerStylePickSelect = document.getElementById("header-style-pick-select") as HTMLSelectElement | null;
 const rdsPsOverlay = document.getElementById("rds-ps-overlay");
 const tabMainEl = document.getElementById("tab-main");
@@ -1371,20 +1370,6 @@ function populateRigPicker(selectEl: HTMLSelectElement | null, rigIds: string[],
   selectEl.disabled = disabled;
 }
 
-function updateRigIdentitySummary(rigId: string | null, pending = false) {
-  if (!headerRigSummary) return;
-  const rig = serverRigs.find((entry) => entry?.remote === rigId);
-  if (!rig) {
-    headerRigSummary.textContent = pending ? "Switching rigs…" : "No rig details available";
-    return;
-  }
-  const hardware = [rig.manufacturer, rig.model].map(value => String(value || "").trim()).filter(Boolean).join(" ") || rig.remote;
-  const modes = Array.isArray(rig.supported_modes) ? rig.supported_modes.map(normalizeMode).filter(Boolean) : [];
-  const features = [rig.tx ? "TX" : "RX", rig.filter_controls ? "SDR filters" : null, ...modes.slice(0, 5)];
-  if (modes.length > 5) features.push(`+${modes.length - 5} modes`);
-  headerRigSummary.textContent = `${pending ? "Switching to " : ""}${hardware} · ${features.filter(Boolean).join(" · ")}`;
-}
-
 function updateRigSubtitle(activeRigId: string | null) {
   if (!rigSubtitle) return;
   const name = (activeRigId && lastRigDisplayNames[activeRigId]) || activeRigId || "--";
@@ -1421,7 +1406,6 @@ function applyRigList(activeRigId: string | null, rigIds: string[], displayNames
   const disableSwitch = lastRigIds.length === 0 || !authRole || authRole === "rx";
   populateRigPicker(headerRigSwitchSelect, lastRigIds, lastActiveRigId, disableSwitch);
   updateRigSubtitle(lastActiveRigId);
-  updateRigIdentitySummary(lastActiveRigId);
   window.trxUi?.setActiveRig(lastActiveRigId);
   if (rigListChanged) {
     window.trx.modules.scheduler?.setRig(lastActiveRigId);
@@ -4023,7 +4007,7 @@ async function switchRigFromSelect(selectEl: HTMLSelectElement) {
   rigSwitchInProgress = true;
   setControlPending(selectEl, true);
   selectEl.closest(".header-rig-switch")?.classList.add("is-switching");
-  updateRigIdentitySummary(nextRig, true);
+  showHint(`Switching to ${lastRigDisplayNames[nextRig] || nextRig}…`);
   showHint(`Switching to ${lastRigDisplayNames[nextRig] || nextRig}…`);
   try {
     const sidParam = sseSessionId ? `&session_id=${encodeURIComponent(sseSessionId)}` : "";
@@ -4031,7 +4015,6 @@ async function switchRigFromSelect(selectEl: HTMLSelectElement) {
     lastActiveRigId = nextRig;
     resetDecoderStateOnRigSwitch();
     updateRigSubtitle(lastActiveRigId);
-    updateRigIdentitySummary(lastActiveRigId);
     window.trxUi?.setActiveRig(lastActiveRigId);
     window.trx.modules.scheduler?.setRig(lastActiveRigId);
     window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
@@ -4050,7 +4033,6 @@ async function switchRigFromSelect(selectEl: HTMLSelectElement) {
   } catch (err) {
     console.error("select_rig failed:", err);
     selectEl.value = prevRig || "";
-    updateRigIdentitySummary(prevRig);
     window.trxUi?.notify("Rig could not be switched", { kind: "error" });
   } finally {
     rigSwitchInProgress = false;

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/ui-core.ts

@@ -195,6 +195,31 @@ function elementById<T extends HTMLElement>(id: string): T {
   const layoutCapabilities: Record<LayoutCapability, boolean> = { broadcast: false, digital: false };
   let activeRigId: string | null = null;
 
+  // A layout seeds the collapsible sections; it does not hold them there.
+  // applyLayout runs on every rig-state refresh, so re-applying the disclosure
+  // state unconditionally would reopen or close sections under the operator
+  // once a second — the reason a section could not be expanded while a layout
+  // that collapses it was selected.  Sections are therefore written only when
+  // the layout actually changes, or the first time each one appears in the DOM
+  // (the advanced controls are built after the first applyLayout call).
+  const layoutSections: { id: string; key: "advanced" | "audio" | "scheduler" }[] = [
+    { id: "advanced-radio-controls", key: "advanced" },
+    { id: "audio-controls", key: "audio" },
+    { id: "scheduler-controls", key: "scheduler" },
+  ];
+  const seededSections = new Set<string>();
+  let appliedLayoutName: LayoutName | null = null;
+
+  function seedLayoutSections(layout: OperatorLayout, layoutChanged: boolean) {
+    layoutSections.forEach(({ id, key }) => {
+      const section = document.getElementById(id) as HTMLDetailsElement | null;
+      if (!section) return;
+      if (!layoutChanged && seededSections.has(id)) return;
+      seededSections.add(id);
+      section.open = layout[key];
+    });
+  }
+
   function layoutStorageKey() {
     return activeRigId ? `trxOperatorLayout:${activeRigId}` : "trxOperatorLayout";
   }
@@ -255,12 +280,9 @@ function elementById<T extends HTMLElement>(id: string): T {
     const layout = layouts[permittedName];
     document.body.dataset.operatorLayout = permittedName in layouts ? permittedName : "compact";
     if (options.persist !== false) localStorage.setItem(layoutStorageKey(), permittedName);
-    const details = document.getElementById("advanced-radio-controls") as HTMLDetailsElement | null;
-    if (details) details.open = layout.advanced;
-    const audioDetails = document.getElementById("audio-controls") as HTMLDetailsElement | null;
-    if (audioDetails) audioDetails.open = layout.audio;
-    const schedulerDetails = document.getElementById("scheduler-controls") as HTMLDetailsElement | null;
-    if (schedulerDetails) schedulerDetails.open = layout.scheduler;
+    const layoutChanged = appliedLayoutName !== permittedName;
+    appliedLayoutName = permittedName;
+    seedLayoutSections(layout, layoutChanged);
     if (options.navigate && typeof browserWindow.navigateToTab === "function") {
       browserWindow.navigateToTab(layout.preferredTab);
     }
@@ -300,6 +322,90 @@ function elementById<T extends HTMLElement>(id: string): T {
     }
   }
 
+  // Secondary controls, in the order they leave the bar when it gets tight.
+  // Audio, record and the rig picker are the operating controls and stay.
+  const overflowOrder = [".operator-layout-picker", ".header-style-pick", "#theme-toggle"];
+
+  function installTopBarOverflow() {
+    const actions = document.querySelector<HTMLElement>(".top-bar-actions");
+    if (!actions || document.getElementById("top-bar-more")) return;
+    const wrap = document.createElement("div");
+    wrap.id = "top-bar-more";
+    wrap.className = "top-bar-more";
+    const button = document.createElement("button");
+    button.type = "button";
+    button.id = "top-bar-more-btn";
+    button.className = "header-bar-btn top-bar-more-btn";
+    button.textContent = "⋯";
+    button.setAttribute("aria-haspopup", "menu");
+    button.setAttribute("aria-expanded", "false");
+    button.setAttribute("aria-label", "More controls");
+    button.title = "More controls";
+    const menu = document.createElement("div");
+    menu.id = "top-bar-more-menu";
+    menu.className = "top-bar-more-menu";
+    menu.setAttribute("role", "menu");
+    button.setAttribute("aria-controls", menu.id);
+    wrap.append(button, menu);
+    actions.appendChild(wrap);
+
+    const closeMenu = () => {
+      menu.classList.remove("is-open");
+      button.setAttribute("aria-expanded", "false");
+    };
+    button.addEventListener("click", () => {
+      const open = menu.classList.toggle("is-open");
+      button.setAttribute("aria-expanded", String(open));
+    });
+    document.addEventListener("click", (event) => {
+      if (!(event.target instanceof Node) || !wrap.contains(event.target)) closeMenu();
+    });
+    document.addEventListener("keydown", (event) => { if (event.key === "Escape") closeMenu(); });
+
+    // Measured against the bar, not the actions container: the actions are
+    // sized by their content, so their own scrollWidth never exceeds their
+    // clientWidth.  A viewport-width threshold is not enough either — how much
+    // fits depends on the rig name and the translated labels, so a bar that is
+    // wide enough on one rig clips a control on another.
+    // `bar.scrollWidth > bar.clientWidth` is true even when nothing is clipped,
+    // so it cannot be the test.  What actually matters is that the controls stay
+    // inside the bar and the page tabs are not squeezed into a scroller: seeing
+    // every tab beats keeping the style picker inline.
+    // Compare natural widths against the space available.  Rendered widths
+    // cannot answer this: the nav has min-width 0 and scrolls, so it always
+    // shrinks to the leftover space and always reports "scrolling", while the
+    // bar reports overflow even when nothing is clipped.  scrollWidth on a
+    // scroll container is its unconstrained content width, which is what a fit
+    // test needs.
+    const barFits = () => {
+      const bar = actions.closest<HTMLElement>(".tab-bar");
+      if (!bar) return true;
+      const identity = bar.querySelector<HTMLElement>(".header-main");
+      const nav = bar.querySelector<HTMLElement>(".tab-bar-nav");
+      const gutters = 48;
+      const needed = (identity?.offsetWidth ?? 0) + (nav?.scrollWidth ?? 0) + actions.scrollWidth + gutters;
+      return needed <= bar.clientWidth;
+    };
+    const reflowOverflow = () => {
+      overflowOrder.forEach((selector) => {
+        const element = menu.querySelector<HTMLElement>(selector);
+        if (element) actions.insertBefore(element, wrap);
+      });
+      wrap.hidden = true;
+      for (const selector of overflowOrder) {
+        if (barFits()) break;
+        const element = actions.querySelector<HTMLElement>(selector);
+        if (!element) continue;
+        wrap.hidden = false;
+        menu.appendChild(element);
+      }
+      wrap.hidden = menu.children.length === 0;
+      if (wrap.hidden) closeMenu();
+    };
+    reflowOverflow();
+    window.addEventListener("resize", reflowOverflow);
+  }
+
   function installMobileMore() {
     const nav = document.querySelector(".tab-bar-nav");
     if (!nav || document.getElementById("mobile-more-btn")) return;
@@ -404,6 +510,7 @@ function elementById<T extends HTMLElement>(id: string): T {
   api.init = function init() {
     ensureLiveRegions();
     installLayoutControls();
+    installTopBarOverflow();
     installMobileMore();
     installDecoderPicker();
     installDecoderBadges();

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/browser-smoke.mjs

@@ -184,7 +184,10 @@ try {
   await page.locator('.tab[data-tab="main"]').click();
   assert.equal(new URL(page.url()).pathname, "/");
 
-  await page.locator('.tab[data-tab="about"]').click();
+  // About is an occasional destination, so it lives behind More at every
+  // width rather than in the operating tab strip.
+  await page.locator("#mobile-more-btn").click();
+  await page.locator('[data-navigate-tab="about"]').click();
   await page.locator("#tab-about").waitFor({ state: "visible" });
   assert.equal(new URL(page.url()).pathname, "/about");
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/ui-core.test.mjs

@@ -143,4 +143,31 @@ ui.applyLayout("digital");
 assert.equal(document.body.dataset.operatorLayout, "compact");
 assert.equal(localStorage.getItem("trxOperatorLayout:rig-b"), "compact");
 
+// A layout seeds the collapsible sections but must not hold them there:
+// applyLayout runs on every rig-state refresh, so an operator who expands a
+// section a layout collapses by default had it shut again about once a second.
+const schedulerSection = new Element("details", document);
+schedulerSection.id = "scheduler-controls";
+const audioSection = new Element("details", document);
+audioSection.id = "audio-controls";
+
+ui.setActiveRig("rig-c");
+ui.applyLayout("compact");
+assert.equal(schedulerSection.open, false, "compact seeds the scheduler section closed");
+
+schedulerSection.open = true;             // operator expands it
+ui.applyLayout("compact");                // the next rig-state refresh
+assert.equal(schedulerSection.open, true, "re-applying the same layout leaves sections alone");
+ui.setActiveRig("rig-c");
+assert.equal(schedulerSection.open, true, "a rig-state refresh leaves sections alone");
+
+// Choosing a different layout is an explicit request for its defaults.
+ui.applyLayout("full");
+assert.equal(schedulerSection.open, true, "full seeds the scheduler section open");
+assert.equal(audioSection.open, true, "full seeds the audio section open");
+audioSection.open = false;
+ui.applyLayout("compact");
+assert.equal(audioSection.open, false, "compact seeds the audio section closed");
+assert.equal(schedulerSection.open, false, "switching layout reseeds every section");
+
 console.log("ui-core component tests passed");