refactor: remove legacy Tauri desktop support

Electron updater now uses Electron release metadata only
Removed legacy Tauri package and migration workflow
Replaced Tauri shim usage with the desktop bridge

packages/ui/src/hooks/useMenuActions.ts

@@ -56,17 +56,13 @@ const copyCurrentSelectionFallback = async (): Promise<boolean> => {
 const MENU_ACTION_EVENT = 'openchamber:menu-action';
 const CHECK_FOR_UPDATES_EVENT = 'openchamber:check-for-updates';
 
-type TauriEventApi = {
+type DesktopBridgeGlobal = {
   listen?: (
     event: string,
     handler: (evt: { payload?: unknown }) => void
   ) => Promise<() => void>;
 };
 
-type TauriGlobal = {
-  event?: TauriEventApi;
-};
-
 type MenuAction =
   | 'about'
   | 'settings'
@@ -344,8 +340,8 @@ export const useMenuActions = (
 
   React.useEffect(() => {
     if (typeof window === 'undefined') return;
-    const tauri = (window as unknown as { __TAURI__?: TauriGlobal }).__TAURI__;
-    const listen = tauri?.event?.listen;
+    const desktop = (window as unknown as { __OPENCHAMBER_DESKTOP__?: DesktopBridgeGlobal }).__OPENCHAMBER_DESKTOP__;
+    const listen = desktop?.listen;
     if (typeof listen !== 'function') return;
 
     let unlistenMenu: null | (() => void | Promise<void>) = null;

packages/ui/src/hooks/useRouter.ts

@@ -27,7 +27,7 @@ function isVSCodeContext(): boolean {
  *
  * Works in:
  * - Web: Full bidirectional sync
- * - Desktop (Tauri): Full bidirectional sync
+ * - Desktop: Full bidirectional sync
  * - VS Code: State-only (no URL updates, reads initial params)
  */
 export function useRouter(): void {

packages/ui/src/hooks/useWindowTitle.ts

@@ -1,6 +1,6 @@
 import React from 'react';
 import { useProjectsStore } from '@/stores/useProjectsStore';
-import { isDesktopLocalOriginActive, isDesktopShell, isTauriShell } from '@/lib/desktop';
+import { isDesktopLocalOriginActive, isDesktopShell } from '@/lib/desktop';
 import { desktopHostsGet, getDesktopHostApiUrl, locationMatchesHost, redactSensitiveUrl } from '@/lib/desktopHosts';
 import { setDesktopWindowTitle } from '@/lib/desktopNative';
 import { getRuntimeApiBaseUrl } from '@/lib/runtime-switch';
@@ -110,7 +110,7 @@ export const useWindowTitle = () => {
       document.title = title;
     }
 
-    if (!isTauriShell()) {
+    if (!isDesktopShell()) {
       return;
     }