feat: add localized ledger explorer dashboard

interface/web/i18n_test.go

@@ -0,0 +1,23 @@
+package web
+
+import (
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestLocaleURLPreservesExplorerQuery(t *testing.T) {
+	request := httptest.NewRequest("GET", "/accounts?class=USER_AVAILABLE&asset_id=9", nil)
+	value := localeURL(request, LocalePersian)
+	for _, expected := range []string{"/accounts?", "class=USER_AVAILABLE", "asset_id=9", "lang=fa"} {
+		if !strings.Contains(value, expected) {
+			t.Fatalf("locale URL %q did not preserve %q", value, expected)
+		}
+	}
+}
+
+func TestTranslationFallsBackToEnglish(t *testing.T) {
+	if got := tr(Locale("invalid"), "overview"); got != "Overview" {
+		t.Fatalf("unexpected fallback translation: %q", got)
+	}
+}