fix(01): remove traefik, lighten dark mode, fix sidebar accent color, move locale switcher to sidebar footer

apps/web/src/components/layout/header.tsx

@@ -3,7 +3,6 @@
 import { useTranslations } from 'next-intl';
 import { useSidebarStore } from '@/lib/stores/sidebar-store';
 import { ThemeToggle } from '@/components/theme-toggle';
-import { LocaleSwitcher } from '@/components/locale-switcher';
 
 export function Header() {
   const t = useTranslations();
@@ -49,7 +48,6 @@ export function Header() {
       {/* Right: Actions */}
       <div className="flex items-center gap-2">
         <ThemeToggle />
-        <LocaleSwitcher />
         {/* User avatar placeholder - wired to auth in Phase 2 */}
         <div
           className="h-8 w-8 rounded-full bg-muted flex items-center justify-center text-xs text-muted-foreground"