add swedish (sv-SE) locale — all three catalogues, wired in all four registration points

538 app.* + 541 panel.* + 43 ui.* = 1122 keys, full parity with en-GB. Registered in
catalogues.ts, locales.ts SHIPPED_LOCALES, and both workspace locales/index.ts —
the four-edit checklist docs/localization.md calls out, since a missed import is
what shipped es-ES/de-DE/fr-FR dead the first time.

files.menu.selected (officerdev) was number-invariant in English ("selected") but
needs one/other in Swedish ("vald"/"valda"), same class of bug as the "1
seleccionados" fix in es-ES — split it rather than copying the English shape.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/apps/officer-web/lib/locales.ts

@@ -19,7 +19,7 @@ const autonym = (code: string): string => {
   return name.charAt(0).toUpperCase() + name.slice(1);
 };
 
-export const SHIPPED_LOCALES: ShippedLocale[] = ['en-GB', 'pt-PT', 'fr-FR', 'de-DE', 'es-ES'].map((code) => ({
+export const SHIPPED_LOCALES: ShippedLocale[] = ['en-GB', 'pt-PT', 'fr-FR', 'de-DE', 'es-ES', 'sv-SE'].map((code) => ({
   code,
   label: autonym(code),
 }));