IMPROVED - Use swappable image icons and move controls to a corner dock

- Dock icons are now real SVG files under public/dock/ (macOS squircle
  look, active variants), so they can be replaced with custom art later.
- Full-bleed icons (DockIcon padding 0), fixed logo src to stop the
  refresh flash.
- Remove the top menu bar entirely; relocate theme/language/sound (+admin)
  into a corner control dock that expands on click.

app/[locale]/(site)/layout.tsx

@@ -8,7 +8,7 @@ import { SiteDock } from "@/components/layout/site-dock";
 import { SiteFooter } from "@/components/layout/site-footer";
 import { ScrollSmootherProvider } from "@/components/scroll-smoother-provider";
 import { isSuperAdmin } from "@/lib/admin-auth";
-import { getMaintenanceMode, getSiteSettings, getSiteSettingsMediaBindings } from "@/lib/app-config";
+import { getMaintenanceMode, getSiteSettings } from "@/lib/app-config";
 import { getLocalizedPath, resolveLocale } from "@/lib/locale";
 
 type SiteLayoutProps = {
@@ -24,9 +24,8 @@ export const revalidate = 0;
 export default async function SiteLayout({ children, params }: SiteLayoutProps) {
   noStore();
   await params;
-  const [maintenanceEnabled, mediaBindings, siteSettings] = await Promise.all([
+  const [maintenanceEnabled, siteSettings] = await Promise.all([
     getMaintenanceMode(),
-    getSiteSettingsMediaBindings(),
     getSiteSettings(),
   ]);
   const localeKey = resolveLocale(await getLocale().catch(() => siteSettings.defaultLocale), siteSettings.defaultLocale);
@@ -44,12 +43,7 @@ export default async function SiteLayout({ children, params }: SiteLayoutProps)
     <>
       <ScrollSmootherProvider />
       <SiteAmbientBackdrop />
-      <SiteDock
-        lightLogoUrl={mediaBindings.siteLogoLight?.url}
-        darkLogoUrl={mediaBindings.siteLogoDark?.url}
-        defaultLocale={siteSettings.defaultLocale}
-        isSuperAdmin={authenticated}
-      />
+      <SiteDock defaultLocale={siteSettings.defaultLocale} isSuperAdmin={authenticated} />
       <div id="smooth-wrapper">
         <div id="smooth-content">
           <div className="site-content-frame flex min-h-screen flex-col">