[management,client] 0.75.0 release with new desktop UI (#6473)

- **Wails v3 application** (`client/ui`) with a React + TypeScript + Tailwind frontend replacing the Fyne UI: main connection view, exit-node switcher, networks/peers browser with detail panels, profile management, settings (general, network, SSH, security, troubleshooting, appearance), debug-bundle creation, and a first-run welcome flow.
- **Internationalization**: go-i18n bundle with 9 locales (en, de, es, fr, hu, it, pt, ru, zh-CN) shared between the tray and the frontend.
- **New system tray** implementation with per-platform theme-aware icons, including a native XEmbed host for Linux (`xembed_tray_linux.c`) and a Linux theme watcher.
- **Session handling**: auth session watcher (`client/internal/auth/sessionwatch`), pending login flow, session-expiration dialog and tray notifications, and `netbird login` improvements.
- **Daemon API extensions** (`daemon.proto`): status stream subscription, event stream, networks/exit-node selection endpoints, and richer full status — with probe throttling on the daemon side to protect against UI-driven request storms.
- **UI preferences store** persisted per profile, autostart management via the daemon (single source of truth in HKCU on Windows).
- **Build system**: Taskfile-based builds per platform (macOS, Linux, Windows), Docker cross-compilation images, MSIX/NSIS/nfpm/AppImage packaging, and a new `frontend-ui` CI workflow.

Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
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: riccardom <riccardomanfrin@gmail.com>

client/ui/notifier/notifier.go

@@ -1,27 +0,0 @@
-// Package notifier sends desktop notifications. On Windows it uses the WinRT
-// COM API directly via go-toast/v2 to avoid the PowerShell window flash that
-// fyne's default implementation produces. On other platforms it delegates to
-// fyne.
-package notifier
-
-import "fyne.io/fyne/v2"
-
-// Notifier sends desktop notifications.
-type Notifier interface {
-	Send(title, body string)
-}
-
-// New returns a platform-specific Notifier. The fyne app is used as the
-// fallback notifier on platforms where no native implementation is wired up,
-// and on Windows when the COM path fails to initialize.
-func New(app fyne.App) Notifier {
-	return newNotifier(app)
-}
-
-type fyneNotifier struct {
-	app fyne.App
-}
-
-func (f *fyneNotifier) Send(title, body string) {
-	f.app.SendNotification(fyne.NewNotification(title, body))
-}

client/ui/notifier/notifier_other.go

@@ -1,9 +0,0 @@
-//go:build !windows
-
-package notifier
-
-import "fyne.io/fyne/v2"
-
-func newNotifier(app fyne.App) Notifier {
-	return &fyneNotifier{app: app}
-}

client/ui/notifier/notifier_windows.go

@@ -1,88 +0,0 @@
-package notifier
-
-import (
-	"os"
-	"path/filepath"
-	"sync"
-
-	"fyne.io/fyne/v2"
-	toast "git.sr.ht/~jackmordaunt/go-toast/v2"
-	"git.sr.ht/~jackmordaunt/go-toast/v2/wintoast"
-	log "github.com/sirupsen/logrus"
-)
-
-const (
-	// appID is the AppUserModelID shown in the Windows Action Center. It
-	// must match the System.AppUserModel.ID property set on the Start Menu
-	// shortcut by the MSI (see client/netbird.wxs); otherwise Windows
-	// groups toasts under a separate, unbranded entry.
-	appID = "NetBird"
-
-	// appGUID identifies the COM activation callback class. Generated once
-	// for NetBird; do not change without coordinating an installer bump,
-	// since old registry entries pointing at the previous GUID would orphan.
-	appGUID = "{0E1B4DE7-E148-432B-9814-544F941826EC}"
-)
-
-type comNotifier struct {
-	fallback *fyneNotifier
-	ready    bool
-	iconPath string
-}
-
-var (
-	initOnce sync.Once
-	initErr  error
-)
-
-func newNotifier(app fyne.App) Notifier {
-	n := &comNotifier{
-		fallback: &fyneNotifier{app: app},
-		iconPath: resolveIcon(),
-	}
-	initOnce.Do(func() {
-		initErr = wintoast.SetAppData(wintoast.AppData{
-			AppID:    appID,
-			GUID:     appGUID,
-			IconPath: n.iconPath,
-		})
-	})
-	if initErr != nil {
-		log.Warnf("toast: register app data failed, falling back to fyne notifications: %v", initErr)
-		return n.fallback
-	}
-	n.ready = true
-	return n
-}
-
-func (n *comNotifier) Send(title, body string) {
-	if !n.ready {
-		n.fallback.Send(title, body)
-		return
-	}
-	notification := toast.Notification{
-		AppID: appID,
-		Title: title,
-		Body:  body,
-		Icon:  n.iconPath,
-	}
-	if err := notification.Push(); err != nil {
-		log.Warnf("toast: push failed, using fyne fallback: %v", err)
-		n.fallback.Send(title, body)
-	}
-}
-
-// resolveIcon returns an absolute path to the toast icon, or an empty string
-// when no icon can be located. Windows requires a PNG/JPG for the
-// AppUserModelId IconUri registry value; .ico is silently ignored.
-func resolveIcon() string {
-	exe, err := os.Executable()
-	if err != nil {
-		return ""
-	}
-	candidate := filepath.Join(filepath.Dir(exe), "netbird.png")
-	if _, err := os.Stat(candidate); err == nil {
-		return candidate
-	}
-	return ""
-}