chore: remove preview-update debug button, add GDI features, add contributor

- Remove debug "Preview Update Modal" button from Settings/About
- Add Win32_Graphics/Win32_Graphics_Gdi features for taskbar GDI icons
- Add sorensiimSalling contributor credit for Russian translation (PR #140)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/Settings.tsx

@@ -107,6 +107,7 @@ const CONTRIBUTORS = [
       'Auto-install script for Debian / RHEL (PR #121)',
       'Album cover art in Discord Rich Presence via iTunes API (PR #111)',
       'Tiling WM detection: hide custom TitleBar on Hyprland/Sway/i3/etc. (PR #134)',
+      'Russian translation: lyricsServerFirst settings strings (PR #140)',
     ],
   },
   {
@@ -1871,13 +1872,6 @@ export default function Settings() {
                   <ExternalLink size={14} />
                   {t('settings.aboutRepo')}
                 </button>
-                <button
-                  className="btn btn-ghost"
-                  style={{ alignSelf: 'flex-start' }}
-                  onClick={() => window.dispatchEvent(new CustomEvent('psysonic:preview-update'))}
-                >
-                  {t('settings.aboutPreviewUpdate')}
-                </button>
               </div>
             </div>
           </section>