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

auth-module/types.ts

@@ -0,0 +1,62 @@
+/**
+ * Frontend Auth Configuration
+ */
+export interface AuthConfig {
+  pbUrl: string;              // PocketBase URL (required)
+  collection?: string;
+  provider?: string;
+  loginContainerId?: string;
+  userDisplayNameId?: string;
+  userEmailId?: string;
+  loginBtnId?: string;
+  loginErrorId?: string;
+}
+
+/**
+ * Frontend configuration provided by backend
+ */
+export interface FrontendConfig {
+  pbUrl: string;
+  provider?: string;
+  collection?: string;
+}
+
+/**
+ * Backend Auth Configuration
+ */
+export interface BackendAuthConfig {
+  clientId?: string;
+  tenantId?: string;
+  clientSecret?: string;
+}
+
+/**
+ * Auth state object
+ */
+export interface AuthState {
+  isAuthenticated: boolean;
+  user: {
+    id: string;
+    name: string;
+    email: string;
+  } | null;
+  token: string | null;
+}
+
+/**
+ * Graph token cache object
+ */
+export interface GraphTokenCache {
+  token: string;
+  expiresOn: number;
+}
+
+/**
+ * Auth event callbacks
+ */
+export interface AuthCallbacks {
+  onAuthSuccess?: (state: AuthState) => void;
+  onAuthFailure?: (error: any) => void;
+  onTokenUpdate?: (state: AuthState) => void;
+  onUiUpdate?: (state: AuthState) => void;
+}