fix: PGXL meters/auth/fan, TCI spots+click, PTT-over-CAT, CW <LOGQSO>

- PGXL: remote AUTH password; direct-link meter fallback (VITA-first) with
  250 ms poll + peak-hold; fan mode uses bare "fanmode=" (was ignored).
- TCI: spot colour sent as decimal ARGB (ExpertSDR dropped the hex string);
  spot click handled via CLICKED_ON_SPOT / RX_CLICKED_ON_SPOT to fill the entry.
- FlexRadio: clicking an OpsLog spot on the panadapter now applies the mode too.
- Filter presets: the trash icon deletes again (Radix pointer-down intercept).
- PTT hotkey: keys over CAT when a backend is active (was hijacked by a stale
  Audio-tab RTS/DTR serial setting); AltGr keys allowed; presses logged.
- CW macro <LOGQSO>: logs after the preceding CW is sent, not on the first letter.

frontend/src/components/AmpWidget.tsx

@@ -189,13 +189,20 @@ function AmpBlock({ amp, flex, showName, t }: {
   const txing = typeof flex?.transmitting === 'boolean'
     ? flex.transmitting
     : fwd ? flexW >= 1 : /TRANSMIT/i.test(pg.state || '');
+  // Prefer the radio's VITA meter stream when it is actually flowing (local or
+  // over a VPN) — it is fast and matches SmartSDR. Fall back to the amp's OWN
+  // link only when the radio isn't streaming its meters (a remote link without
+  // the VITA path), so the reading survives but is naturally slower.
   const liveW = flexW > 0 ? flexW : (pg.connected ? Number(pg.fwd_w) || 0 : 0);
   const fwdW = hold('fwd', txing ? liveW : 0, txing);
   const id = meter(/^ID$|current/i);
-  // Live drain current, for the same reason: peak_id latches like peak_w.
+  // Live drain current, same source preference. peak_id latches like peak_w, so
+  // use the instantaneous 'id' and gate it on the radio's transmit flag.
   const idA = id ? Number(id.value) : (txing ? Number(pg.id) || undefined : 0);
   const temp = meter(/temp/i);
-  const tempC = pg.temperature > 0 ? pg.temperature : (temp ? temp.value : undefined);
+  // VITA temp matches SmartSDR (the amp's direct link exposes a different sensor
+  // that can read ~10°C higher); fall back to the direct temp when no VITA.
+  const tempC = temp ? temp.value : (pg.temperature > 0 ? pg.temperature : undefined);
 
   return (
     <div className="h-full flex flex-col gap-1.5">