补充前端模块状态说明注释

resources/js/chat-room/rooms.js

@@ -2,6 +2,7 @@
 
 import { escapeHtml } from "./html.js";
 
+// 默认空态供右侧面板和手机抽屉共用，调用方仍可通过 options.emptyHtml 覆盖。
 const EMPTY_ROOMS_HTML =
     '<div style="text-align:center;color:#bbb;padding:16px 0;font-size:11px;">暂无房间</div>';
 
@@ -76,6 +77,7 @@ export function renderRoomStatusRow(room, options = {}) {
         ? `<span style="background:#e8f5e9;color:#2e7d32;border-radius:8px;padding:0 ${variant === "mobile" ? "6px" : "5px"};font-size:10px;font-weight:bold;white-space:nowrap;flex-shrink:0;">${room.online}${variant === "mobile" ? "" : " "}人</span>`
         : `<span style="background:#f5f5f5;color:#bbb;border-radius:8px;padding:0 ${variant === "mobile" ? "6px" : "5px"};font-size:10px;white-space:nowrap;flex-shrink:0;">空</span>`;
 
+    // 手机和桌面只区分容器尺寸与视觉密度，房间数据口径保持同一套。
     if (variant === "mobile") {
         return `<div ${clickHandler}
                     style="display:flex;align-items:center;justify-content:space-between;