Added support for single localization

dist/modules/i18n/localizedPath.js

@@ -28,6 +28,12 @@ import { isValidLocale } from './helpers.js';
     if (!slug) {
         return undefined;
     }
+    // Single-locale sites have no /pl, /en prefix — the language segment is
+    // dropped entirely (path is /o-nas, not /pl/o-nas). Detected automatically:
+    // one configured locale means one language, so no prefix is needed. The
+    // project's folder structure matches (app/[[...slug]] without [locale]).
+    const singleLocale = config.locales.length === 1;
+    const localeSegment = singleLocale ? '' : `/${locale}`;
     if (prefix) {
         const segment = prefix[locale];
         // No archive slug in this locale means the entry is unreachable there —
@@ -36,12 +42,13 @@ import { isValidLocale } from './helpers.js';
         if (!segment) {
             return undefined;
         }
-        return `/${locale}/${segment}/${slug}`;
+        return `${localeSegment}/${segment}/${slug}`;
     }
     if (slug === homeSlug) {
-        return `/${locale}`;
+        // Home collapses to the root: '/' for single-locale, '/pl' otherwise.
+        return localeSegment || '/';
     }
-    return `/${locale}/${slug}`;
+    return `${localeSegment}/${slug}`;
 }
 /**
  * Resolves the equivalent path for the same document in a different locale —