feat: Add chromedp and rod-based OAuth authorization methods.

backend/internal/auth/rod.go

@@ -123,7 +123,8 @@ func (r *RodAuth) Close() {
 func (r *RodAuth) CompleteOAuth(authURL, email, password, teamID string) (string, error) {
 	// Handle proxy auth (407) in headless mode.
 	// When Fetch domain is enabled without patterns, requests will be paused and must be continued.
-	if r.proxy != "" {
+	// 只在代理需要认证时才启用 Fetch 域
+	if r.proxy != "" && r.proxyUser != "" {
 		authBrowser, cancel := r.browser.WithCancel()
 		defer cancel()
 
@@ -160,7 +161,8 @@ func (r *RodAuth) CompleteOAuth(authURL, email, password, teamID string) (string
 	}
 	defer page.Close()
 
-	page = page.Timeout(45 * time.Second)
+	// 增加超时时间到 90 秒
+	page = page.Timeout(90 * time.Second)
 
 	if err := page.Navigate(authURL); err != nil {
 		return "", fmt.Errorf("访问授权URL失败: %v", err)