fix(hotkeys): focus the buried dialog and say why the shortcut did nothing

SetForegroundWindow is refused when the hotkey comes from another application, so the dialog was raised but never focused; ForceForegroundWindow is now exposed by PM.Bridge for that. The explanation goes through a tray balloon because our window is disabled and behind the dialog, where no toast would be seen.

delphi-backend/Source/PM.Bridge.pas

@@ -272,6 +272,12 @@ type
       read FOnQuickSearchHotkey write FOnQuickSearchHotkey;
   end;
 
+// Bring a window to the foreground despite the Win10/11 anti-focus-stealing
+// rules (AttachThreadInput + poll). Exposed because the host needs it to raise
+// a native dialog of ours that got buried — plain SetForegroundWindow is
+// refused when we are not the foreground process.
+function ForceForegroundWindow(ATargetHwnd: HWND): Boolean;
+
 implementation
 
 uses
@@ -307,7 +313,6 @@ function UnhookWinEvent(hWinEventHook: THandle): BOOL;
 // Defined further down but needed by the constructor / MinimizeToTray.
 function IsOwnProcessWindow(AHwnd: HWND): Boolean; forward;
 function IsShellWindow(AHwnd: HWND): Boolean; forward;
-function ForceForegroundWindow(ATargetHwnd: HWND): Boolean; forward;
 procedure ForegroundEventProc(hWinEventHook: THandle; AEvent: DWORD; AWnd: HWND;
   idObject, idChild: LongInt; idEventThread, dwmsEventTime: DWORD); stdcall; forward;
 

delphi-backend/UMainForm.pas

@@ -514,7 +514,15 @@ begin
   if (LPopup <> 0) and (LPopup <> LHwnd) and IsWindow(LPopup) then
   begin
     ShowWindow(LPopup, SW_SHOW);
-    SetForegroundWindow(LPopup);
+    // Not plain SetForegroundWindow: the hotkey is pressed from ANOTHER
+    // application, so we are not the foreground process and Windows refuses
+    // the call — the dialog was raised but never focused.
+    ForceForegroundWindow(LPopup);
+    // A tray balloon, not a toast: our own window is disabled and sits behind
+    // the dialog, so nothing rendered in the page would be seen.
+    FBridge.ShowBalloon('Finish the open dialog',
+      'A Save or folder dialog is waiting for an answer. Shortcuts stay ' +
+      'disabled until you close it.', True);
     LogLine('Hotkey ignored — a native dialog is open; brought it to front.');
   end;
 end;