Scaffold @forte/admin package with React, Vite, shadcn/ui, TanStack Router

Sets up the admin frontend with login page, auth guard, API client, Zustand
auth store, and all shadcn/ui components. Vite proxies /v1 to backend in dev.

packages/admin/vite.config.ts

@@ -0,0 +1,27 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
+import { TanStackRouterVite } from '@tanstack/router-plugin/vite'
+import path from 'path'
+
+export default defineConfig({
+  plugins: [
+    TanStackRouterVite({ routesDirectory: './src/routes', generatedRouteTree: './src/routeTree.gen.ts' }),
+    react(),
+    tailwindcss(),
+  ],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  server: {
+    port: 5173,
+    proxy: {
+      '/v1': {
+        target: 'http://localhost:8000',
+        changeOrigin: true,
+      },
+    },
+  },
+})