[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/layouts/AppLayout.tsx

@@ -0,0 +1,27 @@
+import { Outlet } from "react-router-dom";
+import { ClientVersionProvider } from "@/contexts/ClientVersionContext.tsx";
+import { StatusProvider } from "@/contexts/StatusContext.tsx";
+import { DebugBundleProvider } from "@/contexts/DebugBundleContext.tsx";
+import { ProfileProvider } from "@/contexts/ProfileContext.tsx";
+import { DialogProvider } from "@/contexts/DialogContext.tsx";
+import { RestrictionsProvider } from "@/contexts/RestrictionsContext.tsx";
+
+export const AppLayout = () => {
+    return (
+        <div className={"relative flex h-full flex-col"}>
+            <DialogProvider>
+                <StatusProvider>
+                    <ProfileProvider>
+                        <RestrictionsProvider>
+                            <DebugBundleProvider>
+                                <ClientVersionProvider>
+                                    <Outlet />
+                                </ClientVersionProvider>
+                            </DebugBundleProvider>
+                        </RestrictionsProvider>
+                    </ProfileProvider>
+                </StatusProvider>
+            </DialogProvider>
+        </div>
+    );
+};

client/ui/frontend/src/layouts/AppRightPanel.tsx

@@ -0,0 +1,38 @@
+import { type ReactNode } from "react";
+import { motion } from "framer-motion";
+import { cn } from "@/lib/cn.ts";
+
+type Props = {
+    children: ReactNode;
+    overlay?: ReactNode;
+    overlayOpen?: boolean;
+    className?: string;
+};
+
+const PANEL_TRANSITION = {
+    duration: 0.32,
+    ease: [0.32, 0.72, 0, 1] as [number, number, number, number],
+};
+
+export const AppRightPanel = ({ children, overlay, overlayOpen = false, className }: Props) => {
+    return (
+        <div
+            className={cn(
+                "wails-no-draggable relative m-5",
+                "border border-nb-gray-920 bg-nb-gray-940",
+                "flex min-h-0 min-w-0 flex-1 flex-col overflow-hidden rounded-xl rounded-br-2xl",
+                className,
+            )}
+        >
+            <motion.div
+                animate={{ x: overlayOpen ? -48 : 0 }}
+                transition={PANEL_TRANSITION}
+                className={"flex min-h-0 min-w-0 flex-1 flex-col"}
+                style={{ pointerEvents: overlayOpen ? "none" : "auto" }}
+            >
+                {children}
+            </motion.div>
+            {overlay}
+        </div>
+    );
+};