[fix](trx-frontend): add decoder pause controls and rename tab

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -4978,7 +4978,7 @@ window.ft8MapAddLocator = function(message, grids, type = "ft8", station = null,
   applyMapFilter();
 };
 
-// --- Sub-tab navigation (Plugins tab) ---
+// --- Sub-tab navigation (Decoders tab) ---
 document.querySelectorAll(".sub-tab-bar").forEach((bar) => {
   bar.addEventListener("click", (e) => {
     const btn = e.target.closest(".sub-tab[data-subtab]");