[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/services/update.go

@@ -0,0 +1,73 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+	"time"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+
+	"github.com/netbirdio/netbird/client/proto"
+	"github.com/netbirdio/netbird/client/ui/updater"
+)
+
+// UpdateResult mirrors TriggerUpdateResponse.
+type UpdateResult struct {
+	Success  bool   `json:"success"`
+	ErrorMsg string `json:"errorMsg"`
+}
+
+// Update is the Wails-bound facade over the daemon's update RPCs. The state
+// machine and push event live in client/ui/updater.
+type Update struct {
+	conn   DaemonConn
+	holder *updater.Holder
+}
+
+func NewUpdate(conn DaemonConn, holder *updater.Holder) *Update {
+	return &Update{conn: conn, holder: holder}
+}
+
+func (s *Update) GetState() updater.State {
+	return s.holder.Get()
+}
+
+// Quit exits the app. Scheduled off the calling goroutine so the JS caller's
+// response returns before the runtime tears down.
+func (s *Update) Quit() {
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		application.Get().Quit()
+	}()
+}
+
+func (s *Update) Trigger(ctx context.Context) (UpdateResult, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	resp, err := cli.TriggerUpdate(ctx, &proto.TriggerUpdateRequest{})
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	return UpdateResult{
+		Success:  resp.GetSuccess(),
+		ErrorMsg: resp.GetErrorMsg(),
+	}, nil
+}
+
+func (s *Update) GetInstallerResult(ctx context.Context) (UpdateResult, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	resp, err := cli.GetInstallerResult(ctx, &proto.InstallerResultRequest{})
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	return UpdateResult{
+		Success:  resp.GetSuccess(),
+		ErrorMsg: resp.GetErrorMsg(),
+	}, nil
+}