[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/frontend/src/contexts/NavSectionContext.tsx

@@ -0,0 +1,24 @@
+import { createContext, useContext, useMemo, useState, type ReactNode } from "react";
+
+export type NavSection = "peers" | "networks";
+
+type NavSectionContextValue = {
+    section: NavSection;
+    setSection: (s: NavSection) => void;
+};
+
+const NavSectionContext = createContext<NavSectionContextValue | null>(null);
+
+export const useNavSection = (): NavSectionContextValue => {
+    const ctx = useContext(NavSectionContext);
+    if (!ctx) {
+        throw new Error("useNavSection must be used inside NavSectionProvider");
+    }
+    return ctx;
+};
+
+export const NavSectionProvider = ({ children }: { children: ReactNode }) => {
+    const [section, setSection] = useState<NavSection>("peers");
+    const value = useMemo<NavSectionContextValue>(() => ({ section, setSection }), [section]);
+    return <NavSectionContext.Provider value={value}>{children}</NavSectionContext.Provider>;
+};