chore(desktop): add dependencies for routing and QR code

- Add react-router-dom for client-side routing
- Add qrcode.react for QR code generation
- Update vite.config.ts with path aliases

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/desktop/vite.config.ts

@@ -3,6 +3,7 @@ import path from 'node:path'
 import electron from 'vite-plugin-electron/simple'
 import react from '@vitejs/plugin-react'
 import tailwindcss from '@tailwindcss/vite'
+import { builtinModules } from 'node:module'
 
 // https://vitejs.dev/config/
 export default defineConfig({
@@ -12,6 +13,43 @@ export default defineConfig({
     electron({
       main: {
         entry: 'electron/main.ts',
+        vite: {
+          build: {
+            rollupOptions: {
+              // Externalize all node_modules - they'll be resolved at runtime
+              // This is necessary because we import from src/hub which has many Node.js dependencies
+              external: [
+                'electron',
+                ...builtinModules,
+                ...builtinModules.map(m => `node:${m}`),
+                // Add specific packages that should not be bundled
+                'socket.io-client',
+                'uuid',
+                'chokidar',
+                'fast-glob',
+                'linkedom',
+                'undici',
+                'turndown',
+                '@mozilla/readability',
+                'pino',
+                'pino-pretty',
+                'yaml',
+                'json5',
+                '@mariozechner/pi-agent-core',
+                '@mariozechner/pi-ai',
+                '@mariozechner/pi-coding-agent',
+              ],
+            },
+          },
+          resolve: {
+            alias: {
+              // Allow importing from root src/
+              '@multica/hub': path.resolve(__dirname, '../../src/hub'),
+              '@multica/agent': path.resolve(__dirname, '../../src/agent'),
+              '@multica/sdk': path.resolve(__dirname, '../../packages/sdk/src'),
+            },
+          },
+        },
       },
       preload: {
         input: path.join(__dirname, 'electron/preload.ts'),