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>
     </>

frontend/src/components/monitor/alertShared.tsx

@@ -47,7 +47,7 @@ export const CHANNEL_TYPES: { key: string; label: string; placeholder: string }[
   { key: 'dingtalk', label: '钉钉', placeholder: '{\n  "webhook": "https://oapi.dingtalk.com/robot/send?access_token=***",\n  "secret": "SECxxx"\n}' },
   { key: 'wechat', label: '企业微信', placeholder: '{\n  "webhook": "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=***"\n}' },
   { key: 'email', label: '邮件', placeholder: '{\n  "to": "ops@ezops.io",\n  "subject": "告警通知"\n}' },
-  { key: 'sms', label: '短信', placeholder: '{\n  "phones": "13800138000",\n  "sign": "EZOps"\n}' },
+  { key: 'sms', label: '短信', placeholder: '{\n  "phones": "13800138000",\n  "sign": "AIOps"\n}' },
   { key: 'webhook', label: 'Webhook', placeholder: '{\n  "url": "https://example.com/alert"\n}' },
 ];