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/lib/desktopNative.ts

@@ -1,30 +1,15 @@
-import { isDesktopShell } from '@/lib/desktop';
+import { hasDesktopInvoke, invokeDesktop, isDesktopShell } from '@/lib/desktop';
 
 type InvokeArgs = Record<string, unknown>;
 
-const isElectronDesktop = (): boolean => {
-  return typeof window !== 'undefined' && Boolean((window as { __OPENCHAMBER_ELECTRON__?: unknown }).__OPENCHAMBER_ELECTRON__);
-};
-
-const getInvoke = () => {
-  if (typeof window === 'undefined') {
-    return null;
-  }
-  const tauri = (window as unknown as {
-    __TAURI__?: { core?: { invoke?: (cmd: string, args?: InvokeArgs) => Promise<unknown> } };
-  }).__TAURI__;
-  return typeof tauri?.core?.invoke === 'function' ? tauri.core.invoke : null;
-};
-
 export const invokeDesktopCommand = async <TValue = unknown>(
   command: string,
   args?: InvokeArgs,
 ): Promise<TValue> => {
-  const invoke = getInvoke();
-  if (!invoke) {
+  if (!hasDesktopInvoke()) {
     throw new Error('Desktop runtime is not available');
   }
-  return invoke(command, args) as Promise<TValue>;
+  return invokeDesktop<TValue>(command, args) as Promise<TValue>;
 };
 
 export const startDesktopWindowDrag = async (): Promise<void> => {
@@ -33,13 +18,7 @@ export const startDesktopWindowDrag = async (): Promise<void> => {
   }
 
   try {
-    if (isElectronDesktop()) {
-      await invokeDesktopCommand('desktop_start_window_drag');
-      return;
-    }
-
-    const { getCurrentWindow } = await import('@tauri-apps/api/window');
-    await getCurrentWindow().startDragging();
+    await invokeDesktopCommand('desktop_start_window_drag');
   } catch {
     // ignore
   }
@@ -51,11 +30,6 @@ export const isDesktopWindowFullscreen = async (): Promise<boolean> => {
   }
 
   try {
-    if (!isElectronDesktop()) {
-      const { getCurrentWindow } = await import('@tauri-apps/api/window');
-      return await getCurrentWindow().isFullscreen();
-    }
-
     return Boolean(await invokeDesktopCommand('desktop_is_window_fullscreen'));
   } catch {
     return false;
@@ -77,12 +51,6 @@ export const setDesktopWindowTitle = async (title: string): Promise<void> => {
   }
 
   try {
-    if (!isElectronDesktop()) {
-      const { getCurrentWindow } = await import('@tauri-apps/api/window');
-      await getCurrentWindow().setTitle(title);
-      return;
-    }
-
     await invokeDesktopCommand('desktop_set_window_title', { title });
   } catch {
     // ignore
@@ -98,12 +66,6 @@ export const setDesktopWindowTheme = async (
   }
 
   try {
-    if (!isElectronDesktop()) {
-      const { invoke } = await import('@tauri-apps/api/core');
-      await invoke('desktop_set_window_theme', { themeMode, themeVariant });
-      return;
-    }
-
     await invokeDesktopCommand('desktop_set_window_theme', { themeMode, themeVariant });
   } catch {
     // ignore
@@ -116,11 +78,6 @@ export const getDesktopAppVersion = async (): Promise<string | null> => {
   }
 
   try {
-    if (!isElectronDesktop()) {
-      const { getVersion } = await import('@tauri-apps/api/app');
-      return await getVersion();
-    }
-
     const version = await invokeDesktopCommand('desktop_get_app_version');
     return typeof version === 'string' && version.trim().length > 0 ? version : null;
   } catch {
@@ -146,17 +103,6 @@ export const listenDesktopNativeDragDrop = async (
     return null;
   }
 
-  // Electron uses the renderer's native DOM drag/drop events instead of a
-  // separate webview drag listener.
-  if (isElectronDesktop()) {
-    return null;
-  }
-
-  try {
-    const { getCurrentWebviewWindow } = await import('@tauri-apps/api/webviewWindow');
-    const webviewWindow = getCurrentWebviewWindow();
-    return await webviewWindow.onDragDropEvent(handler as never);
-  } catch {
-    return null;
-  }
+  void handler;
+  return null;
 };