[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/uilog.go

@@ -0,0 +1,36 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// UILog forwards frontend console output into logrus, tagging the JS origin
+// as the "ui" field to stay distinct from logrus's Go-caller source.
+type UILog struct{}
+
+func NewUILog() *UILog { return &UILog{} }
+
+// Log maps an unrecognised level to info; empty source becomes "unknown".
+func (s *UILog) Log(_ context.Context, level, source, msg string) {
+	origin := "unknown"
+	if source != "" {
+		origin = source
+	}
+	entry := log.WithField("ui", origin)
+	switch level {
+	case "trace":
+		entry.Trace(msg)
+	case "debug":
+		entry.Debug(msg)
+	case "warn", "warning":
+		entry.Warn(msg)
+	case "error":
+		entry.Error(msg)
+	default:
+		entry.Info(msg)
+	}
+}