feat: add pitch-deck service to core infrastructure

Migrated pitch-deck from breakpilot-pwa to breakpilot-core.
Container: bp-core-pitch-deck on port 3012.

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

pitch-deck/components/LanguageToggle.tsx

@@ -0,0 +1,24 @@
+'use client'
+
+import { Language } from '@/lib/types'
+
+interface LanguageToggleProps {
+  lang: Language
+  onToggle: () => void
+}
+
+export default function LanguageToggle({ lang, onToggle }: LanguageToggleProps) {
+  return (
+    <button
+      onClick={onToggle}
+      className="fixed top-4 right-4 z-40 flex items-center gap-1
+        px-3 py-1.5 rounded-full bg-white/[0.06] backdrop-blur-sm
+        border border-white/10 text-xs font-medium
+        hover:bg-white/[0.1] transition-all"
+    >
+      <span className={lang === 'de' ? 'text-white' : 'text-white/40'}>DE</span>
+      <span className="text-white/20 mx-1">|</span>
+      <span className={lang === 'en' ? 'text-white' : 'text-white/40'}>EN</span>
+    </button>
+  )
+}