[client] UI refactor (#6069)

Refactor UI

---------

Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Pascal Fischer <32096965+pascal-fischer@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: riccardom <riccardomanfrin@gmail.com>

client/ui/services/i18n.go

@@ -0,0 +1,30 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+
+	"github.com/netbirdio/netbird/client/ui/i18n"
+)
+
+// I18n is the Wails-bound facade over i18n.Bundle; the translation logic lives
+// in client/ui/i18n.
+type I18n struct {
+	bundle *i18n.Bundle
+}
+
+func NewI18n(bundle *i18n.Bundle) *I18n {
+	return &I18n{bundle: bundle}
+}
+
+// Languages returns the shipped locales.
+func (s *I18n) Languages(_ context.Context) ([]i18n.Language, error) {
+	return s.bundle.Languages(), nil
+}
+
+// Bundle returns the full key->text map so the React side can drive its own
+// translation library off the same source bundles.
+func (s *I18n) Bundle(_ context.Context, code i18n.LanguageCode) (map[string]string, error) {
+	return s.bundle.BundleFor(code)
+}