added NAS configuration file; updated MediaViewer to support thumbnail carousel; improved error handling in NASAPI and NASAUTH; refactored various comments for clarity

src/AUTH/AuthServiceBase.js

@@ -1,7 +1,4 @@
-/**
- * Abstract base class for authentication services
- * This provides a common interface for different authentication providers
- */
+// Abstract base class for authentication services — provides a common interface for all providers
 export class AuthServiceBase {
   constructor() {
     if (new.target === AuthServiceBase) {
@@ -9,26 +6,11 @@ export class AuthServiceBase {
     }
   }
 
-  async authenticate() {
-    throw new Error('authenticate() must be implemented');
-  }
-
-  async getAccessToken() {
-    throw new Error('getAccessToken() must be implemented');
-  }
-
-  async refreshToken() {
-    throw new Error('refreshToken() must be implemented');
-  }
-
-  async revokeAccess() {
-    throw new Error('revokeAccess() must be implemented');
-  }
-
-  async getUserInfo() {
-    throw new Error('getUserInfo() must be implemented');
-  }
+  async authenticate() { throw new Error('authenticate() must be implemented'); }
+  async getAccessToken() { throw new Error('getAccessToken() must be implemented'); }
+  async refreshToken() { throw new Error('refreshToken() must be implemented'); }
+  async revokeAccess() { throw new Error('revokeAccess() must be implemented'); }
+  async getUserInfo() { throw new Error('getUserInfo() must be implemented'); }
 }
 
 export default AuthServiceBase;
-