Phase 5: move global-settings persistence into the controller

MakeGlobalSettings (the central persist builder, ~50 fields) lived in MainForm
and mixed radio state with UI fields, blocking headless persistence. Replace it
with TRadioController.BuildGlobalSettings (radio fields from live state) +
SaveGlobalSettings (self-gated on FDevConnected). The 7 scattered
SaveGlobal(FDevMAC, MakeGlobalSettings) call-sites collapse to FController.
SaveGlobalSettings.

Non-radio fields (theme/FPS/MHz-digits/CAT) are NOT controller state — they ride
through FLoadedGlobal (the loaded persist record the controller already holds for
round-trip). The GUI mirrors them into FLoadedGlobal at their change-points
(SetLightTheme/ApplyFPS/ApplyFreqMhzDigits/OnCATSettingsChange + connect for the
app-global theme). Controller never reads or acts on them.

Behavior-preserving (same blob, same save points); makes the daemon able to
persist radio settings without the UI.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

RadioController.pas

@@ -314,6 +314,13 @@ type
     function  MakeBandSettings: TBandSettings;
     procedure SaveCurrentBand;
     procedure RestoreBand(BandIdx: Integer);
+
+    // Глобальные настройки устройства (persist по MAC). BuildGlobalSettings
+    // собирает радио-поля из своего состояния, а НЕ-радио поля (тема/FPS/digits/
+    // CAT) переносит сквозь из FLoadedGlobal — контроллер их не трактует, только
+    // round-trip в файл. SaveGlobalSettings пишет блоб (гейт по FDevConnected).
+    function  BuildGlobalSettings: TGlobalSettings;
+    procedure SaveGlobalSettings;
     // Применяет DSP-настройки диапазона (mode/filter/AGC/CTUN/FM) + шлёт события
     // рендера. НЕ трогает частоты VFO/центр — это переиспользуется как RestoreBand
     // (с загрузкой VFO), так и SetActiveVfo (bandstack: смена бэнда без сброса VFO).
@@ -994,6 +1001,77 @@ begin
   FSettings.SaveBand(FDevMAC, FCurrentBand, FBandCache[FCurrentBand]);
 end;
 
+function TRadioController.BuildGlobalSettings: TGlobalSettings;
+// Радио-поля — из живого состояния; тема/FPS/digits/CAT — сквозь из FLoadedGlobal
+// (контроллер их не трактует). Сидируем загруженным блобом, поверх — радио.
+var i: Integer;
+begin
+  Result := FLoadedGlobal;   // несёт не-радио поля (тема/FPS/digits/CAT) round-trip
+
+  Result.Volume           := FVolume;
+  Result.DriveLevel       := FDrivePercent;
+  Result.PAMaxPower       := FPAMaxPower;
+  for i := 0 to CFG_BAND_COUNT - 1 do Result.PABandCal[i]  := FPABandCal[i];
+  for i := 0 to CFG_XVTR_COUNT - 1 do Result.VHFBandCal[i] := FVHFBandCal[i];
+  Result.ActiveVfo        := FActiveVfo;
+  Result.NRMode           := FNRMode;
+  Result.NBMode           := FNBMode;
+  Result.SNBEnabled       := FSNB;
+  Result.ANFEnabled       := FANF;
+  Result.AGCSlope         := 0;
+  Result.AGCHangThreshold := 100;
+  Result.WfAGCEnabled     := FWfAGCEnabled;
+  Result.WfNFEnabled      := FWfNFEnabled;
+  Result.DitherEnabled    := FDitherEnabled;
+  Result.RandomEnabled    := FRandomEnabled;
+  Result.LastBand         := FCurrentBand;
+  Result.LastXvtr         := FCurrentXvtr;
+  Result.SampleRate       := FSampleRate;
+  if FWDSPReady then
+  begin
+    Result.FFTSize       := FDSPEngine.FFTSize;
+    Result.WindowType    := FDSPEngine.WindowType;
+    Result.SpecDetector  := FDSPEngine.SpecDetector;
+    Result.SpecAvgMode   := FDSPEngine.SpecAvgMode;
+    Result.SpecAvgTimeMS := FDSPEngine.SpecAvgTimeMS;
+    Result.WfDetector    := FDSPEngine.WfDetector;
+    Result.WfAvgMode     := FDSPEngine.WfAvgMode;
+    Result.WfAvgTimeMS   := FDSPEngine.WfAvgTimeMS;
+  end
+  else
+  begin
+    Result.FFTSize       := 131072;
+    Result.WindowType    := 2;
+    Result.SpecDetector  := 0;
+    Result.SpecAvgMode   := 3;
+    Result.SpecAvgTimeMS := 30.0;
+    Result.WfDetector    := 0;
+    Result.WfAvgMode     := 3;
+    Result.WfAvgTimeMS   := 120.0;
+  end;
+  Result.WfManualHigh    := FWfManualHigh;
+  Result.WfManualLow     := FWfManualLow;
+  Result.WfAGCOffset     := FWfAGCOffset;
+  Result.SpecRefLevel    := FSpecRefLevel;
+  Result.SpecRange       := FSpecRange;
+  Result.SpecGridStep    := FSpecGridStep;
+  Result.AudioSampleRate := FAudioOut.SampleRate;
+  Result.ShowSpectrum    := FShowSpectrum;
+  Result.ShowWaterfall   := FShowWaterfall;
+  Result.ShowWideband    := FShowWideband;
+  Result.WidebandFill    := FWidebandFill;
+  Result.SpectrumFill    := FSpectrumFill;
+  Result.DisplayDuplex   := FDisplayDuplex;
+  Result.AudioOutDevice  := FAudioOutDevName;
+  Result.AudioInDevice   := FAudioInDevName;
+  Result.SendAudioToRadio := FSendAudioToRadio;
+end;
+
+procedure TRadioController.SaveGlobalSettings;
+begin
+  if FDevConnected then FSettings.SaveGlobal(FDevMAC, BuildGlobalSettings);
+end;
+
 procedure TRadioController.ApplyBandDSP(const B: TBandSettings);
 // DSP-настройки диапазона + события рендера. Частоты VFO/центр НЕ трогает.
 begin