[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/preferences.go

@@ -0,0 +1,36 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+
+	"github.com/netbirdio/netbird/client/ui/i18n"
+	"github.com/netbirdio/netbird/client/ui/preferences"
+)
+
+// Preferences is the Wails-bound facade over preferences.Store; the context.Context-first
+// signatures are what the binding generator requires.
+type Preferences struct {
+	store *preferences.Store
+}
+
+func NewPreferences(store *preferences.Store) *Preferences {
+	return &Preferences{store: store}
+}
+
+func (s *Preferences) Get(_ context.Context) (preferences.UIPreferences, error) {
+	return s.store.Get(), nil
+}
+
+func (s *Preferences) SetLanguage(_ context.Context, lang i18n.LanguageCode) error {
+	return s.store.SetLanguage(lang)
+}
+
+func (s *Preferences) SetViewMode(_ context.Context, mode preferences.ViewMode) error {
+	return s.store.SetViewMode(mode)
+}
+
+func (s *Preferences) SetOnboardingCompleted(_ context.Context, done bool) error {
+	return s.store.SetOnboardingCompleted(done)
+}