Add native self-hosted instance connection to fluxer_desktop

Trimmed monorepo checkout (fluxer_desktop + packages/voice_engine_v2 +
tools/ci) with a "Connect to a Different Server" menu item and popout
that lets the desktop app switch to any self-hosted Fluxer instance,
plus fixes for well-known discovery on single-domain self-hosted
deployments and a false-positive ERR_ABORTED on same-origin client
redirects during the switch. Defaults to chat.fluxr.chat and uses an
isolated userData directory from the official build.

fluxer_desktop/native/win-shell/index.d.ts

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+export interface CreateShortcutOptions {
+	lnkPath: string;
+	target: string;
+	args?: string;
+	appUserModelId?: string;
+	toastActivatorClsid?: string;
+	iconPath?: string;
+	iconIndex?: number;
+	workingDir?: string;
+	description?: string;
+}
+
+export interface SetRunValueOptions {
+	name: string;
+	command: string;
+}
+
+export declare function createShortcut(opts: CreateShortcutOptions): Promise<void>;
+
+export declare function setCurrentUserRunValue(opts: SetRunValueOptions): Promise<void>;
+
+export declare function deleteCurrentUserRunValue(name: string): Promise<void>;
+
+export declare function getCurrentUserRunValue(name: string): Promise<string | null>;
+
+export declare function getUserNotificationState(): string;
+
+export declare const loadError: Error | null;