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.

app.go

@@ -8984,15 +8984,21 @@ func (a *App) pttUnkey() {
 // configured Audio → PTT method (CAT / RTS / DTR); when that is VOX/none it
 // falls back to CAT keying so the hotkey still works with a plain CAT rig.
 func (a *App) PTTHotkeyDown() error {
+	// This hotkey lives under CAT and is meant to key the rig over CAT — so prefer
+	// CAT whenever a backend is active. Only a rig with no CAT link falls back to
+	// the Audio-tab PTT method (RTS/DTR serial). Previously it always used the
+	// Audio method, so a stale serial PTT setting (e.g. an RTS line on a COM port
+	// that is no longer present) hijacked the hotkey and it failed with a serial
+	// error — even though the operator only ever wanted CAT.
+	if a.cat != nil {
+		return a.pttKey(AudioSettings{PTTMethod: "cat"})
+	}
 	cfg, err := a.GetAudioSettings()
 	if err != nil {
 		return err
 	}
 	if cfg.PTTMethod == "" || cfg.PTTMethod == "none" {
-		if a.cat == nil {
-			return fmt.Errorf("no PTT method configured and CAT not active")
-		}
-		cfg.PTTMethod = "cat"
+		return fmt.Errorf("no PTT method configured and CAT not active")
 	}
 	return a.pttKey(cfg)
 }
@@ -14783,6 +14789,7 @@ type AmpConfig struct {
 	Transport string `json:"transport"` // "tcp" | "serial"
 	Host      string `json:"host"`
 	Port      int    `json:"port"`
+	Password  string `json:"password"` // PowerGenius XL remote-access code (blank on LAN); sent as AUTH like the Tuner/Antenna Genius
 	ComPort   string `json:"com_port"`
 	Baud      int    `json:"baud"`
 
@@ -14931,7 +14938,7 @@ func (a *App) startAmps() {
 		inst := &ampInst{cfg: c}
 		switch {
 		case isPGXL:
-			inst.pgxl = powergenius.New(c.Host, c.Port)
+			inst.pgxl = powergenius.New(c.Host, c.Port, c.Password)
 			_ = inst.pgxl.Start()
 			if a.pgxl == nil {
 				a.pgxl = inst.pgxl