[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/hooks/useKeyboardShortcut.ts

@@ -0,0 +1,46 @@
+import { useEffect } from "react";
+import { isMacOS } from "@/lib/platform";
+
+export type Shortcut = {
+    key: string;
+    cmd?: boolean;
+    shift?: boolean;
+    alt?: boolean;
+    preventDefault?: boolean;
+};
+
+export const useKeyboardShortcut = (shortcut: Shortcut, callback: () => void, enabled = true) => {
+    useEffect(() => {
+        if (!enabled) return;
+        const onKey = (e: KeyboardEvent) => {
+            if (e.key.toLowerCase() !== shortcut.key.toLowerCase()) return;
+            const mod = e.metaKey || e.ctrlKey;
+            if (!!shortcut.cmd !== mod) return;
+            if (!!shortcut.shift !== e.shiftKey) return;
+            if (!!shortcut.alt !== e.altKey) return;
+            if (shortcut.preventDefault !== false) e.preventDefault();
+            callback();
+        };
+        globalThis.addEventListener("keydown", onKey);
+        return () => globalThis.removeEventListener("keydown", onKey);
+    }, [
+        shortcut.key,
+        shortcut.cmd,
+        shortcut.shift,
+        shortcut.alt,
+        shortcut.preventDefault,
+        callback,
+        enabled,
+    ]);
+};
+
+export const formatShortcut = (shortcut: Shortcut): string => {
+    // navigator.platform is empty on some WebView2 builds → misrenders ⌘ as Ctrl on Mac.
+    const mac = isMacOS();
+    const parts: string[] = [];
+    if (shortcut.cmd) parts.push(mac ? "⌘" : "Ctrl");
+    if (shortcut.shift) parts.push(mac ? "⇧" : "Shift");
+    if (shortcut.alt) parts.push(mac ? "⌥" : "Alt");
+    parts.push(shortcut.key.length === 1 ? shortcut.key.toUpperCase() : shortcut.key);
+    return parts.join(mac ? "" : "+");
+};