feat: 登录页底部添加ICP备案号及工信部链接

- 新增login-footer，显示粤ICP备2025408522号-2
- 链接跳转至 https://beian.miit.gov.cn
- 样式：底部居中，hover变为主题色

Co-Authored-By: Claude <noreply@anthropic.com>

admin-web/src/views/login/index.vue

@@ -40,6 +40,9 @@
 			</div>
 		</div>
 	</div>
+	<div class="login-footer">
+		<a href="https://beian.miit.gov.cn" target="_blank" rel="noopener noreferrer">粤ICP备2025408522号-2</a>
+	</div>
 </template>
 
 <script setup lang="ts" name="loginIndex">
@@ -255,4 +258,19 @@ onMounted(() => {
 		}
 	}
 }
+.login-footer {
+	position: absolute;
+	bottom: 20px;
+	width: 100%;
+	text-align: center;
+	z-index: 10;
+	a {
+		color: #999;
+		font-size: 13px;
+		text-decoration: none;
+		&:hover {
+			color: var(--el-color-primary);
+		}
+	}
+}
 </style>