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/ChatHistory/index.tsx

@@ -9,6 +9,7 @@ import { errorText } from 'helpers/error-text';
 import { useDashboardState } from 'state/useDashboardState';
 import type { ClaudeSessionDetail } from 'state/useClaudeSessions';
 import { defaultLayout, hasAppType } from './defaultLayout';
+import { useTranslation } from '@/lib/i18n';
 
 // How many messages to render on first open (anchored to the bottom); scroll-up pages older ones in.
 const CHAT_TAIL = 20;
@@ -18,6 +19,7 @@ type SessionListPageProps = {
 };
 
 export const SessionListPage = ({ isNew }: SessionListPageProps) => {
+  const { t } = useTranslation();
   // The group is a path suffix now, not ?cwd= — see officerdev/apps/ChatHistory/chat-routes.ts.
   const { sessionId, '*': splat } = useParams<{ sessionId: string; '*': string }>();
   const groupCwd = cwdFromSplat(splat);
@@ -122,7 +124,7 @@ export const SessionListPage = ({ isNew }: SessionListPageProps) => {
         // Falling back to a bare id still opens a usable pane, but silently: you get an empty chat and
         // no hint that the transcript could not be read, which is indistinguishable from a new session.
         // Most often the id is stale — the transcript was deleted or pruned out from under the link.
-        toast.error(`Could not load this conversation: ${errorText(err, 'not found')}`);
+        toast.error(t('chatHistory.loadFailed', { reason: errorText(err, 'not found') }));
         setSelected({ id: sessionId });
       }
     })();