feat: QO-100 beacon bulletin text display (Phase C)

Decode and show the AO-40 frame payload as text in the beacon scope window.

- RadioController.GetBeaconFrame exposes the latest 256-byte frame.
- BeaconScopeForm: poll the frame counter; on each new frame, parse the
  payload (drop trailing 2-byte CRC, printable ASCII, 64-char lines, as in
  gr-satellites qo100.parse) and append to a scrolling read-only memo.
- Window widened/heightened; constellation size capped to leave room.

Frame format verified offline against a real on-air capture: the decoder
produces the live QO-100 AMSAT bulletin text (RS errors=0).

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

BeaconScopeForm.pas

@@ -16,18 +16,22 @@ interface
 
 uses
   Classes, SysUtils, Math, StrUtils,
-  Forms, Controls, Graphics, ExtCtrls,
+  Forms, Controls, Graphics, ExtCtrls, StdCtrls,
-  AppTheme, BeaconDecoder, RadioController;
+  AppTheme, BeaconDecoder, BeaconFEC, RadioController;
 
 type
   TBeaconScopeForm = class(TForm)
   private
     FCtl:    TRadioController;
     FBox:    TPaintBox;
+    FMemo:   TMemo;            // декодированный текст бюллетеня (AO-40 кадры)
     FTimer:  TTimer;
     FTheme:  TAppTheme;
+    FLastFrames: Int64;        // счётчик кадров на прошлом тике (детект нового)
     procedure DoTick(Sender: TObject);
     procedure DoPaint(Sender: TObject);
+    procedure PollFrame;
+    function  FrameToText(const Frame: TBeaconFrame): string;
   public
     constructor CreateWith(AOwner: TComponent; ACtl: TRadioController);
     procedure ApplyTheme(const T: TAppTheme);
@@ -41,12 +45,25 @@ begin
   FCtl := ACtl;
   FTheme := DarkTheme;
 
-  Caption := 'QO-100 Beacon — Constellation';
+  Caption := 'QO-100 Beacon — Constellation + Bulletin';
   BorderStyle := bsSizeable;
-  Width := 360;
+  Width := 600;
-  Height := 560;
+  Height := 680;
   Position := poScreenCenter;
 
+  // Текст бюллетеня (декодированные AO-40 кадры) — снизу, моноширинный, ReadOnly.
+  FMemo := TMemo.Create(Self);
+  FMemo.Parent := Self;
+  FMemo.Align := alBottom;
+  FMemo.Height := 230;
+  FMemo.ReadOnly := True;
+  FMemo.ScrollBars := ssVertical;
+  FMemo.WordWrap := False;
+  FMemo.Font.Name := 'Courier New';
+  FMemo.Font.Size := 9;
+  FMemo.Color := FTheme.BG;
+  FMemo.Font.Color := FTheme.Text;
+
   FBox := TPaintBox.Create(Self);
   FBox.Parent := Self;
   FBox.Align := alClient;
@@ -61,12 +78,57 @@ end;
 procedure TBeaconScopeForm.ApplyTheme(const T: TAppTheme);
 begin
   FTheme := T;
+  if FMemo <> nil then
+  begin
+    FMemo.Color := FTheme.BG;
+    FMemo.Font.Color := FTheme.Text;
+  end;
   if FBox <> nil then FBox.Invalidate;
 end;
 
 procedure TBeaconScopeForm.DoTick(Sender: TObject);
 begin
-  if (FBox <> nil) and Visible then FBox.Invalidate;
+  if not Visible then Exit;
+  PollFrame;
+  if FBox <> nil then FBox.Invalidate;
+end;
+
+function TBeaconScopeForm.FrameToText(const Frame: TBeaconFrame): string;
+// AO-40 кадр QO-100 = ASCII-текст (space-padded), последние 2 байта = CRC-16.
+// Как gr-satellites qo100.parse: отбрасываем CRC, печатные ASCII, строки по 64.
+var
+  i, b: Integer;
+  line: string;
+begin
+  Result := '';
+  i := 0;
+  while i <= 253 do
+  begin
+    line := '';
+    for b := i to Min(i + 63, 253) do
+      if (Frame[b] >= 32) and (Frame[b] < 127) then line := line + Chr(Frame[b])
+      else line := line + ' ';
+    Result := Result + TrimRight(line) + LineEnding;
+    Inc(i, 64);
+  end;
+end;
+
+procedure TBeaconScopeForm.PollFrame;
+// Раз/тик: если декодер выдал НОВЫЙ кадр (S.Frames вырос) — печатаем бюллетень.
+var
+  S: TBeaconScope;
+  Frame: TBeaconFrame;
+  rs: Integer;
+begin
+  if FCtl = nil then Exit;
+  if not FCtl.GetBeaconScope(S) then Exit;
+  if S.Frames <= FLastFrames then Exit;
+  FLastFrames := S.Frames;
+  if not FCtl.GetBeaconFrame(Frame, rs) then Exit;
+  FMemo.Append(Format('--- frame %d  (RS err %d) ---', [S.Frames, rs]));
+  FMemo.Append(FrameToText(Frame));
+  while FMemo.Lines.Count > 400 do FMemo.Lines.Delete(0);   // ограничиваем рост
+  FMemo.SelStart := Length(FMemo.Text);                     // автоскролл вниз
 end;
 
 procedure TBeaconScopeForm.DoPaint(Sender: TObject);
@@ -89,6 +151,7 @@ begin
   // область констелляции — квадрат сверху, текст снизу
   r := (Min(W, H - 70) - 20) div 2;
   if r < 20 then r := 20;
+  if r > 110 then r := 110;          // кап: оставляем место метрикам над memo
   cx := W div 2;
   cy := 10 + r;
 

RadioController.pas

@@ -49,7 +49,7 @@ interface
 uses
   Classes, SysUtils, Math,
   HPSDRProtocol, HPSDRNetwork, RadioBackend, PlutoBackend, IIOBindings,
-  WDSPEngine, AudioOutput, AudioInput, BeaconDecoder,
+  WDSPEngine, AudioOutput, AudioInput, BeaconDecoder, BeaconFEC,
   Settings, ChannelStore, FMRepeater, BoardUtils, DeviceStore;
 
 type
@@ -503,6 +503,7 @@ type
     procedure SetBeaconDecodeInvert(On_: Boolean);    // зеркальный baseband вкл/выкл
     function  BeaconDecodeInvert: Boolean;
     function  GetBeaconScope(out S: TBeaconScope): Boolean;
+    function  GetBeaconFrame(out Frame: TBeaconFrame; out RSErrors: Integer): Boolean;
 
     // Отображение / приём
     procedure SetCTun(On_: Boolean);
@@ -1473,6 +1474,11 @@ begin
   else FillChar(S, SizeOf(S), 0);
 end;
 
+function TRadioController.GetBeaconFrame(out Frame: TBeaconFrame; out RSErrors: Integer): Boolean;
+begin
+  Result := Assigned(FBeaconDec) and FBeaconDec.GetLastFrame(Frame, RSErrors);
+end;
+
 procedure TRadioController.ApplyModeFilter;
 var
   Lo, Hi, Half: Integer;