[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/components/switches/SwitchItemGroup.tsx

@@ -0,0 +1,60 @@
+import * as RadioGroup from "@radix-ui/react-radio-group";
+import { createContext, type ReactNode, useContext, useId, useMemo } from "react";
+import { cn } from "@/lib/cn";
+
+type SwitchItemGroupContextValue = {
+    value: string;
+    layoutId: string;
+};
+
+const SwitchItemGroupContext = createContext<SwitchItemGroupContextValue | null>(null);
+
+export const useSwitchItemGroup = () => {
+    const ctx = useContext(SwitchItemGroupContext);
+    if (!ctx) {
+        throw new Error("SwitchItem must be used inside a SwitchItemGroup");
+    }
+    return ctx;
+};
+
+type Props = {
+    value: string;
+    onChange: (value: string) => void;
+    children: ReactNode;
+    className?: string;
+    disabled?: boolean;
+    "aria-label"?: string;
+    "aria-labelledby"?: string;
+};
+
+export const SwitchItemGroup = ({
+    value,
+    onChange,
+    children,
+    className,
+    disabled = false,
+    "aria-label": ariaLabel,
+    "aria-labelledby": ariaLabelledBy,
+}: Props) => {
+    const layoutId = useId();
+    const contextValue = useMemo(() => ({ value, layoutId }), [value, layoutId]);
+
+    return (
+        <SwitchItemGroupContext.Provider value={contextValue}>
+            <RadioGroup.Root
+                value={value}
+                onValueChange={onChange}
+                disabled={disabled}
+                aria-label={ariaLabel}
+                aria-labelledby={ariaLabelledBy}
+                className={cn(
+                    "flex shrink-0 overflow-hidden rounded-lg border border-nb-gray-850 bg-nb-gray-910 p-1",
+                    disabled && "pointer-events-none opacity-50",
+                    className,
+                )}
+            >
+                {children}
+            </RadioGroup.Root>
+        </SwitchItemGroupContext.Provider>
+    );
+};