[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/debug.go

@@ -0,0 +1,136 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"google.golang.org/protobuf/types/known/durationpb"
+
+	"github.com/netbirdio/netbird/client/proto"
+	"github.com/netbirdio/netbird/version"
+)
+
+type DebugBundleParams struct {
+	Anonymize    bool   `json:"anonymize"`
+	SystemInfo   bool   `json:"systemInfo"`
+	UploadURL    string `json:"uploadUrl"`
+	LogFileCount uint32 `json:"logFileCount"`
+}
+
+// DebugBundleResult: Path is set for local-only bundles, UploadedKey on upload
+// success, UploadFailureReason on upload failure.
+type DebugBundleResult struct {
+	Path                string `json:"path"`
+	UploadedKey         string `json:"uploadedKey"`
+	UploadFailureReason string `json:"uploadFailureReason"`
+}
+
+// LogLevel carries a logrus level name: "error", "warn", "info", "debug", "trace".
+type LogLevel struct {
+	Level string `json:"level"`
+}
+
+type Debug struct {
+	conn DaemonConn
+}
+
+func NewDebug(conn DaemonConn) *Debug {
+	return &Debug{conn: conn}
+}
+
+func (s *Debug) Bundle(ctx context.Context, p DebugBundleParams) (DebugBundleResult, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return DebugBundleResult{}, err
+	}
+	resp, err := cli.DebugBundle(ctx, &proto.DebugBundleRequest{
+		Anonymize:    p.Anonymize,
+		SystemInfo:   p.SystemInfo,
+		UploadURL:    p.UploadURL,
+		LogFileCount: p.LogFileCount,
+		CliVersion:   version.NetbirdVersion(),
+	})
+	if err != nil {
+		return DebugBundleResult{}, err
+	}
+	return DebugBundleResult{
+		Path:                resp.GetPath(),
+		UploadedKey:         resp.GetUploadedKey(),
+		UploadFailureReason: resp.GetUploadFailureReason(),
+	}, nil
+}
+
+func (s *Debug) GetLogLevel(ctx context.Context) (LogLevel, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return LogLevel{}, err
+	}
+	resp, err := cli.GetLogLevel(ctx, &proto.GetLogLevelRequest{})
+	if err != nil {
+		return LogLevel{}, err
+	}
+	return LogLevel{Level: resp.GetLevel().String()}, nil
+}
+
+// RevealFile opens the OS file manager focused on path. Needed because Wails'
+// Browser.OpenURL refuses non-http(s) schemes like file://.
+func (s *Debug) RevealFile(_ context.Context, path string) error {
+	if path == "" {
+		return fmt.Errorf("empty path")
+	}
+	return revealFile(path)
+}
+
+// RegisterUILog reports the GUI log path to the daemon for bundle collection;
+// the daemon runs as root and can't resolve the user's config dir. Called on
+// each daemon (re)connect.
+func (s *Debug) RegisterUILog(ctx context.Context, path string) error {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return err
+	}
+	_, err = cli.RegisterUILog(ctx, &proto.RegisterUILogRequest{Path: path})
+	return err
+}
+
+func (s *Debug) StartBundleCapture(ctx context.Context, timeoutSeconds int32) error {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return err
+	}
+	req := &proto.StartBundleCaptureRequest{}
+	if timeoutSeconds > 0 {
+		req.Timeout = durationpb.New(time.Duration(timeoutSeconds) * time.Second)
+	}
+	_, err = cli.StartBundleCapture(ctx, req)
+	return err
+}
+
+func (s *Debug) StopBundleCapture(ctx context.Context) error {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return err
+	}
+	_, err = cli.StopBundleCapture(ctx, &proto.StopBundleCaptureRequest{})
+	return err
+}
+
+func (s *Debug) SetLogLevel(ctx context.Context, lvl LogLevel) error {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return err
+	}
+	// proto.LogLevel_value keys are upper-case enum names; callers pass
+	// lowercase logrus names. Upper-case before lookup or a valid level
+	// silently falls through to INFO.
+	level, ok := proto.LogLevel_value[strings.ToUpper(lvl.Level)]
+	if !ok {
+		level = int32(proto.LogLevel_INFO)
+	}
+	_, err = cli.SetLogLevel(ctx, &proto.SetLogLevelRequest{Level: proto.LogLevel(level)})
+	return err
+}