refactor: rename EZOps → AIOps globally (brand unification)

frontend/src/components/auth/Login.tsx

@@ -235,7 +235,7 @@ export function Login() {
               </svg>
             </div>
             <h1 className="text-3xl font-bold dg-gradient-text tracking-tight">
-              EZOps AIOps
+              AIOps
             </h1>
             <p
               className="mt-2 text-sm"
@@ -366,7 +366,7 @@ export function Login() {
           className="absolute bottom-4 left-0 right-0 text-center text-xs"
           style={{ color: 'var(--dg-text-muted)', opacity: 0.7 }}
         >
-          © EZOps AIOps · 智能运维平台
+          © AIOps · 智能运维平台
         </p>
       </div>
     </>