Add Mode1 auth testing environment with token comparison verification

- Created Mode1 as self-contained test environment
- Added auth-module copy with self-contained configuration
- Implemented backend server with Graph token and PocketBase validation endpoints
- Added frontend test dashboard with token comparison functionality
- Fixed TypeScript compatibility issues (replaced import.meta.dir with __dirname)
- Implemented actual PB token validation in comparison endpoint (no placeholders)
- All endpoints tested and working with real tokens

Mode1/vite.config.ts

@@ -0,0 +1,17 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  build: {
+    outDir: 'frontend/dist',
+    emptyOutDir: true,
+    lib: {
+      entry: 'frontend/auth.ts',
+      name: 'AuthModule',
+      fileName: () => 'auth.js',
+      formats: ['umd']
+    }
+  },
+  server: {
+    middlewareMode: true
+  }
+});