feat(hotkey): make the new-entry hotkey configurable + fix tray title capture

Part A — Ctrl+Shift+A (new entry from window title) is now editable like the
other 3 global hotkeys, following the same pattern end to end: state.newEntryHotkey
(synced), a capture button in Settings > Autofill, dup cross-check, reset-to-
defaults, autofillPushHotkeys, and Bridge.setAutofillHotkeys carrying ne_mods/
ne_vk. Delphi gets SetNewEntryHotkey + stores the live combo (FNewEntryHotkeyMods/
Vk) so ExecuteAutofill's post-fill re-register uses the user's combo instead of
resetting to Ctrl+Shift+A. UMainForm parses ne_* unconditionally (works with
autofill off).

Part B — new-entry from the tray pre-filled the title with "Password Manager":
GetForegroundWindow resolved to our own hidden window. Only capture the title
when the foreground window belongs to another process; otherwise pass '' (blank).

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

delphi-backend/UMainForm.pas

@@ -874,6 +874,16 @@ begin
       LogLine(Format('Quick-search hotkey set — mods:%d vk:%d (ok=%s)',
         [LQsMods, LQsVk, BoolToStr(LQsOk, True)]));
     end;
+    // New-entry combo — also independent of the autofill enabled flag
+    // (Ctrl+Shift+A works even with autofill turned off).
+    if GetParam('ne_vk') <> '' then
+    begin
+      var LNeMods := Word(StrToIntDef(GetParam('ne_mods'), 6));
+      var LNeVk   := Word(StrToIntDef(GetParam('ne_vk'),   Ord('A')));
+      var LNeOk   := FBridge.SetNewEntryHotkey(LNeMods, LNeVk);
+      LogLine(Format('New-entry hotkey set — mods:%d vk:%d (ok=%s)',
+        [LNeMods, LNeVk, BoolToStr(LNeOk, True)]));
+    end;
     if GetParam('enabled') <> '1' then
     begin
       FBridge.UnregisterAutofillHotkey;