activity, capabilities, chat history and the locale picker (21 -> 2)

The locale picker's labels are now AUTONYMS computed from Intl -- each language named
in its own language, so "Português europeu" reads as Portuguese whichever locale the
UI is in. That is the convention for a language picker and the useful behaviour:
somebody who cannot read the current language still has to find theirs.

CapabilityPage interpolated the capability KIND into six strings by lowercasing it in
code. "skill" does not lowercase into a Portuguese noun, so kind is a parameter now.

What is left is two strings, both deliberate: see the next commit message.

src/apps/officer-web/Screens/Dashboard/PasskeyGate/index.tsx

@@ -4,8 +4,10 @@ import { KeyRound } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Card } from '@/components/Card';
 import { useAuth } from 'hooks/useAuth';
+import { useTranslation } from '@/lib/i18n';
 
 export const PasskeyGate = () => {
+  const { t } = useTranslation();
   const { user, createPasskeyCredentials } = useAuth();
   const [isRegistering, setIsRegistering] = useState(false);
 
@@ -31,7 +33,7 @@ export const PasskeyGate = () => {
             <KeyRound className="h-8 w-8 text-duck-teal" />
           </div>
 
-          <h2 className="text-2xl font-bold text-duck-dark">Set up your passkey</h2>
+          <h2 className="text-2xl font-bold text-duck-dark">{t('passkeyGate.setUp')}</h2>
 
           <p className="text-duck-dark/70">
             Passkeys provide a secure, passwordless way to access your account. Each device or browser needs its own