fix(build): ShowBalloon must be public (called from UMainForm)

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

delphi-backend/Source/PM.Bridge.pas

@@ -125,12 +125,12 @@ type
     procedure PrepareNid;
     procedure ShowTrayMenu;
     procedure ShowFirstTimeBalloon;
+    function FindFMXAppWindow: HWND;
+  public
     // Tray balloon (gated by the "Show tray notifications" setting). Used
     // for messages the user must see while the window is hidden — e.g. an
     // autofill blocked by an elevated target.
     procedure ShowBalloon(const ATitle, AText: string; AWarning: Boolean = False);
-    function FindFMXAppWindow: HWND;
-  public
     constructor Create(AMainForm: TForm);
     destructor Destroy; override;
     // Hide main window and show tray icon. AClearClipboard defaults to