fix(autofill): honest result reporting + restore maximized from tray

Bug 1: a maximized window trayed via the quick-search fill flow came back
"normal" on the next restore. ExecuteAutofill minimizes the window BEFORE
MinimizeToTray snapshots the placement, so the snapshot said SHOWMINIMIZED
and the never-restore-minimized guard forced SHOWNORMAL. Now honours
WPF_RESTORETOMAXIMIZED (Windows keeps the pre-minimize state in flags).

Bug 2: filling into an elevated app (admin Notepad) showed "password sent"
while UIPI silently discarded the keystrokes (SendInput even reports
success). ExecuteAutofill is now a function: it checks the target process
elevation up front (can't-open counts as elevated) and returns False without
typing. UMainForm feeds the result to JS via Bridge.onAutofillResult; the
quick-search success toast is deferred until Delphi confirms, and a failure
shows "Autofill blocked - the target window runs as administrator".

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

delphi-backend/UMainForm.pas

@@ -1467,14 +1467,19 @@ begin
   TTimer(Sender).Free;
 
   // ARestoreAfter = not HideAfter: if the app was open before the hotkey
-  // (quick-search beside the target), it comes back after the fill; if it
+  // (quick-search beside the target), it stays visible during the fill; if it
   // started hidden, the MinimizeToTray below re-hides it anyway.
-  FBridge.ExecuteAutofill(TargetHwnd, PendingUser, PendingPass, UserOnly,
-    not HideAfter);
+  var LFillOk := FBridge.ExecuteAutofill(TargetHwnd, PendingUser, PendingPass,
+    UserOnly, not HideAfter);
   ForegroundAfter := GetForegroundWindow;
-  LogLine(Format('Autofill executed — target=%s, foreground_after=%s, match=%s',
+  LogLine(Format('Autofill executed — target=%s, foreground_after=%s, ok=%s',
     [IntToHex(TargetHwnd, 8), IntToHex(ForegroundAfter, 8),
-     BoolToStr(ForegroundAfter = TargetHwnd, True)]));
+     BoolToStr(LFillOk, True)]));
+  // Tell JS whether the keystrokes were actually sent — the success toast
+  // must not lie when the target runs elevated (UIPI drops our input).
+  WebBrowser.ExecuteJavaScript(
+    'if(window.Bridge&&typeof Bridge.onAutofillResult==="function")' +
+    'Bridge.onAutofillResult(' + BoolToStr(LFillOk, True).ToLower + ')');
 
   // Hide-after (Ctrl+Shift+Q from tray): SendInput is done, the target
   // already has focus — now we can safely tray ourselves without