[feat](trx-frontend-http): make the SQL label the squelch switch

Clicking SQL turns the squelch on and off.  The label and the button
beside it said the same thing twice — one naming the control, the other
reading "On" or "Off" — where the name itself is the obvious target, and
the dot already carries the state: grey when off, green while the gate
passes, amber while it holds.

The pressed state is on the label, so the switch reads the same to a
screen reader as it looks.

Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -1856,9 +1856,32 @@ small { color: var(--text-muted); }
   font-size: 0.82rem;
   white-space: nowrap;
 }
-.sql-title {
+/* The name is the switch: one target instead of a label and a button that
+   said the same thing twice, with the dot carrying the state. */
+.sql-toggle {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.3rem;
+  height: 1.5rem;
+  min-height: 0;
+  padding: 0 0.4rem;
+  border: 1px solid transparent;
+  border-radius: 4px;
+  background: transparent;
+  color: var(--text-muted);
+  font-size: 0.82rem;
   font-weight: 700;
   letter-spacing: 0.02em;
+  cursor: pointer;
+}
+.sql-toggle:hover {
+  border-color: color-mix(in srgb, var(--border-light) 60%, transparent);
+  color: var(--text);
+}
+.sql-toggle[aria-pressed="true"] {
+  border-color: color-mix(in srgb, var(--accent-green) 50%, var(--border-light));
+  background: color-mix(in srgb, var(--accent-green) 10%, transparent);
+  color: var(--accent-text);
 }
 .sql-state {
   width: 0.5rem;