feat(client): add Portuguese language localization (#688)

Expose Portuguese through shared locale preferences and keep the catalog synchronized with current English messages. Use keyed interpolation so series headings follow each language’s natural word order.

Closes #673

Co-authored-by: neon <18559658+neonsolstice@users.noreply.github.com>

packages/types/src/locale.ts

@@ -1,4 +1,4 @@
-export const SUPPORTED_LOCALES = ["en", "de", "nl", "sl"] as const;
+export const SUPPORTED_LOCALES = ["en", "de", "nl", "pt", "sl"] as const;
 export type Locale = (typeof SUPPORTED_LOCALES)[number];
 
 export const DEFAULT_LOCALE: Locale = "en";
@@ -8,6 +8,7 @@ export const LOCALE_LABELS: Record<Locale, string> = {
   en: "English",
   de: "Deutsch",
   nl: "Nederlands",
+  pt: "Português",
   sl: "Slovenščina",
 };
 
@@ -15,6 +16,7 @@ export const LOCALE_DIRECTIONS: Record<Locale, "ltr" | "rtl"> = {
   en: "ltr",
   de: "ltr",
   nl: "ltr",
+  pt: "ltr",
   sl: "ltr",
 };