fix: RoleAuthManager直接连接manage-app，不添加签名头

根本原因：
- 测试环境启动的是manage-app（8084端口），不是gateway（8080端口）
- manage-app没有签名验证过滤器
- 添加签名头会导致认证失败

修复方案：
- 改回8084端口
- 不添加签名头，直接发送请求

影响范围：
- Token注入登录测试
- 所有需要认证的测试

novalon-manage-web/e2e/role-based-tests/shared/role-auth-manager.ts

@@ -10,7 +10,7 @@ const SIGNATURE_SECRET = 'NovalonManageSystemSecretKey2026';
 
 export class RoleAuthManager {
   private static tokenCache: Map<string, TokenCache> = new Map();
-  private static readonly API_BASE_URL = process.env.VITE_API_BASE_URL || 'http://localhost:8080';
+  private static readonly API_BASE_URL = process.env.VITE_API_BASE_URL || 'http://localhost:8084';
   private static readonly TOKEN_EXPIRY_BUFFER = 60000;
 
   static async getRoleToken(roleName: string): Promise<string> {
@@ -59,13 +59,11 @@ export class RoleAuthManager {
   private static async authenticateWithBackend(credentials: { username: string; password: string }): Promise<string> {
     const path = '/api/auth/login';
     const body = JSON.stringify(credentials);
-    const signatureHeaders = this.generateSignatureHeaders('POST', path, body);
 
     const response = await fetch(`${this.API_BASE_URL}${path}`, {
       method: 'POST',
       headers: {
-        'Content-Type': 'application/json',
-        ...signatureHeaders
+        'Content-Type': 'application/json'
       },
       body,
     });