fix(trx-client): prefer TX rig default and add header rig picker

src/trx-client/src/remote_client.rs

@@ -211,11 +211,11 @@ async fn refresh_remote_snapshot(
     }
 
     let selected = selected_rig_id(config);
-    let fallback = &rigs[0];
     let target = selected
         .as_deref()
         .and_then(|id| rigs.iter().find(|entry| entry.rig_id == id))
-        .unwrap_or(fallback);
+        .or_else(|| choose_default_rig(rigs.as_slice()))
+        .ok_or_else(|| RigError::communication("GetRigs returned no selectable rig"))?;
 
     if selected.as_deref() != Some(target.rig_id.as_str()) {
         set_selected_rig_id(config, Some(target.rig_id.clone()));
@@ -287,6 +287,15 @@ fn set_selected_rig_id(config: &RemoteClientConfig, value: Option<String>) {
     }
 }
 
+fn choose_default_rig(rigs: &[RigEntry]) -> Option<&RigEntry> {
+    rigs.iter().max_by_key(|entry| {
+        let tx_capable = entry.state.info.capabilities.tx;
+        let initialized = entry.state.initialized;
+        // Prefer initialized TX-capable rigs; tie-break by rig_id for deterministic choice.
+        (tx_capable, initialized, entry.rig_id.as_str())
+    })
+}
+
 async fn read_limited_line<R: AsyncBufRead + Unpin>(
     reader: &mut R,
     max_bytes: usize,

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

@@ -279,6 +279,8 @@ const headerSigCanvas = document.getElementById("header-sig-canvas");
 const themeToggleBtn = document.getElementById("theme-toggle");
 const rigSwitchSelect = document.getElementById("rig-switch-select");
 const rigSwitchBtn = document.getElementById("rig-switch-btn");
+const headerRigSwitchSelect = document.getElementById("header-rig-switch-select");
+const headerRigSwitchBtn = document.getElementById("header-rig-switch-btn");
 
 let lastControl;
 let lastTxEn = null;
@@ -341,6 +343,25 @@ function readyText() {
   return lastClientCount !== null ? `Ready \u00b7 ${lastClientCount} user${lastClientCount !== 1 ? "s" : ""}` : "Ready";
 }
 
+function populateRigPicker(selectEl, rigIds, activeRigId, disabled) {
+  if (!selectEl) return;
+  const selectedBefore = selectEl.value;
+  selectEl.innerHTML = "";
+  rigIds.forEach((id) => {
+    const opt = document.createElement("option");
+    opt.value = id;
+    opt.textContent = id;
+    selectEl.appendChild(opt);
+  });
+  const preferred = (typeof activeRigId === "string" && rigIds.includes(activeRigId))
+    ? activeRigId
+    : selectedBefore;
+  if (preferred && rigIds.includes(preferred)) {
+    selectEl.value = preferred;
+  }
+  selectEl.disabled = disabled;
+}
+
 function showHint(msg, duration) {
   powerHint.textContent = msg;
   if (hintTimer) clearTimeout(hintTimer);
@@ -950,26 +971,11 @@ function render(update) {
   if (Array.isArray(update.rig_ids)) {
     lastRigIds = update.rig_ids.filter((id) => typeof id === "string" && id.length > 0);
     document.getElementById("about-rig-list").textContent = lastRigIds.length ? lastRigIds.join(", ") : "--";
-    if (rigSwitchSelect) {
+    const disableSwitch = lastRigIds.length === 0 || authRole === "rx";
-      const selectedBefore = rigSwitchSelect.value;
+    populateRigPicker(rigSwitchSelect, lastRigIds, update.active_rig_id, lastRigIds.length === 0);
-      rigSwitchSelect.innerHTML = "";
+    populateRigPicker(headerRigSwitchSelect, lastRigIds, update.active_rig_id, lastRigIds.length === 0);
-      lastRigIds.forEach((id) => {
+    if (rigSwitchBtn) rigSwitchBtn.disabled = disableSwitch;
-        const opt = document.createElement("option");
+    if (headerRigSwitchBtn) headerRigSwitchBtn.disabled = disableSwitch;
-        opt.value = id;
-        opt.textContent = id;
-        rigSwitchSelect.appendChild(opt);
-      });
-      const preferred = (typeof update.active_rig_id === "string" && lastRigIds.includes(update.active_rig_id))
-        ? update.active_rig_id
-        : selectedBefore;
-      if (preferred && lastRigIds.includes(preferred)) {
-        rigSwitchSelect.value = preferred;
-      }
-      rigSwitchSelect.disabled = lastRigIds.length === 0;
-      if (rigSwitchBtn) {
-        rigSwitchBtn.disabled = lastRigIds.length === 0 || authRole === "rx";
-      }
-    }
   }
   if (typeof update.rigctl_clients === "number") {
     document.getElementById("about-rigctl-clients").textContent = update.rigctl_clients;
@@ -1110,8 +1116,8 @@ async function postPath(path) {
   return resp;
 }
 
-async function switchRig() {
+async function switchRigFromSelect(selectEl) {
-  if (!rigSwitchSelect || !rigSwitchSelect.value) {
+  if (!selectEl || !selectEl.value) {
     showHint("No rig selected", 1500);
     return;
   }
@@ -1119,25 +1125,31 @@ async function switchRig() {
     showHint("Control role required", 1500);
     return;
   }
-  if (!lastRigIds.includes(rigSwitchSelect.value)) {
+  if (!lastRigIds.includes(selectEl.value)) {
     showHint("Unknown rig", 1500);
     return;
   }
   if (rigSwitchBtn) rigSwitchBtn.disabled = true;
+  if (headerRigSwitchBtn) headerRigSwitchBtn.disabled = true;
   showHint("Switching rig…");
   try {
-    await postPath(`/select_rig?rig_id=${encodeURIComponent(rigSwitchSelect.value)}`);
+    await postPath(`/select_rig?rig_id=${encodeURIComponent(selectEl.value)}`);
     showHint("Rig switch requested", 1500);
   } catch (err) {
     showHint("Rig switch failed", 2000);
     console.error(err);
   } finally {
-    if (rigSwitchBtn) rigSwitchBtn.disabled = authRole === "rx";
+    const disableSwitch = lastRigIds.length === 0 || authRole === "rx";
+    if (rigSwitchBtn) rigSwitchBtn.disabled = disableSwitch;
+    if (headerRigSwitchBtn) headerRigSwitchBtn.disabled = disableSwitch;
   }
 }
 
 if (rigSwitchBtn) {
-  rigSwitchBtn.addEventListener("click", switchRig);
+  rigSwitchBtn.addEventListener("click", () => switchRigFromSelect(rigSwitchSelect));
+}
+if (headerRigSwitchBtn) {
+  headerRigSwitchBtn.addEventListener("click", () => switchRigFromSelect(headerRigSwitchSelect));
 }
 
 powerBtn.addEventListener("click", async () => {

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

@@ -22,6 +22,10 @@
       </div>
       <div class="header-right">
         <img id="logo" class="header-logo" src="/logo.png?v=1" alt="trx logo" onerror="this.style.display='none'" />
+        <div class="header-rig-switch">
+          <select id="header-rig-switch-select" aria-label="Select active rig"></select>
+          <button id="header-rig-switch-btn" type="button">Switch Rig</button>
+        </div>
         <div class="button-group">
           <button id="theme-toggle" class="theme-toggle-btn" type="button" aria-label="Toggle dark or light theme">Light</button>
           <button id="header-auth-btn" class="theme-toggle-btn" type="button" style="display:none;" aria-label="Login or Logout">Login</button>

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

@@ -338,6 +338,27 @@ small { color: var(--text-muted); }
   gap: 0.4rem;
   flex-shrink: 0;
 }
+.header-rig-switch {
+  display: flex;
+  align-items: center;
+  gap: 0.35rem;
+}
+.header-rig-switch select {
+  min-width: 8rem;
+  height: 2rem;
+  padding: 0.15rem 0.35rem;
+  border: 1px solid var(--border-light);
+  border-radius: 6px;
+  background: var(--input-bg);
+  color: var(--text);
+  font-size: 0.85rem;
+}
+.header-rig-switch button {
+  height: 2rem;
+  padding: 0 0.65rem;
+  font-size: 0.78rem;
+  white-space: nowrap;
+}
 .header-logo { height: 6em; width: auto; flex-shrink: 0; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.35)); }
 .button-group {
   display: flex;
@@ -549,6 +570,8 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   .header-text { width: auto; min-width: 0; flex: 0 1 auto; }
   .header-signal-wrap { display: none; }
   .header-right { align-items: flex-end; }
+  .header-rig-switch { width: 100%; justify-content: flex-end; }
+  .header-rig-switch select { min-width: 6.5rem; }
   .controls-row { grid-template-columns: 1fr auto; }
   .controls-col-power { grid-column: 1 / -1; }
   .controls-col.label-below-col .inline,