feat(yubico): refactor Yubico credential management and enhance settings UI

webapp/src/lib/api/auth.ts

@@ -687,6 +687,7 @@ function normalizeYubiKeySettings(raw: any): YubiKeyOtpSettings {
     ],
     nfc: !!(raw?.nfc ?? raw?.Nfc),
     yubicoConfigured: !!(raw?.yubicoConfigured ?? raw?.YubicoConfigured),
+    yubicoCanManage: !!(raw?.yubicoCanManage ?? raw?.YubicoCanManage),
     yubicoClientId: String(raw?.yubicoClientId ?? raw?.YubicoClientId ?? ''),
     yubicoSecretKey: String(raw?.yubicoSecretKey ?? raw?.YubicoSecretKey ?? ''),
   };

webapp/src/lib/types.ts

@@ -423,6 +423,7 @@ export interface YubiKeyOtpSettings {
   keys: [string, string, string, string, string];
   nfc: boolean;
   yubicoConfigured: boolean;
+  yubicoCanManage: boolean;
   yubicoClientId: string;
   yubicoSecretKey: string;
 }