docs: explain stylesheet ownership, responsive rules and display boundaries

app/assets/styles/PageInfoNotice._16xRFrB.css

@@ -1,3 +1,5 @@
+/* 页面说明容器：静态提示的边界、颜色与内容间距。 */
+/* 导入方：app/components/PageInfoNotice.vue、app/pages/invoices/index.vue、app/pages/invoices/request.vue、app/pages/security/groups/index.vue。 */
 .page-info-notice[data-v-8f81f268] {
   min-width: 0;
   box-shadow: none;
@@ -16,6 +18,7 @@
   font-size: 14px;
   display: inline-flex;
 }
+/* 允许连续长文本换行，防止IP、密钥或用户输入撑破当前容器；不会修改原始数据。 */
 .page-info-notice[data-v-8f81f268] .p-message-text {
   overflow-wrap: anywhere;
   min-width: 0;