[feat](trx-frontend-http): add F hotkey to focus frequency input

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

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

@@ -10534,6 +10534,14 @@ window.addEventListener("keydown", (event) => {
     return;
   }
 
+  // F — focus frequency input
+  if (key === "f" && !event.ctrlKey && !event.metaKey && !event.altKey && !shouldIgnoreGlobalShortcut(event.target)) {
+    event.preventDefault();
+    const fi = document.getElementById("freq");
+    if (fi) { fi.focus(); fi.select(); }
+    return;
+  }
+
   if (event.ctrlKey || event.metaKey || event.altKey) return;
   if (shouldIgnoreGlobalShortcut(event.target)) return;
 

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

@@ -1258,6 +1258,7 @@
       <div class="shortcut-overlay-title">Keyboard Shortcuts</div>
       <table class="shortcut-table">
         <tbody>
+          <tr><td class="shortcut-key"><kbd>F</kbd></td><td>Focus frequency input</td></tr>
           <tr><td class="shortcut-key"><kbd>R</kbd></td><td>Round frequency up to next step</td></tr>
           <tr><td class="shortcut-key"><kbd>T</kbd></td><td>Retune current frequency</td></tr>
           <tr><td class="shortcut-key"><kbd>B</kbd></td><td>Jump to previous freq/bw/mode</td></tr>