修复用户实测反馈的4处问题：品牌名泄露、修改密码页注释泄露、安全提醒页未居中、群相关行间距

- 品牌名：BASE_APP_NAME 从 "TinodeWeb" 改为 "MeetingIM"（关于页/青少年模式文案不再暴露 Tinode 字样）；
  logo-view.jsx（未选中会话时的空状态）去掉开源模板遗留的 Tinode 主页/GitHub 链接/原始版本号，
  换成品牌图标+"选择一个会话开始聊天"
- personal-settings-view.jsx：删除 ChangePassword 页面里被误当正文渲染的开发注释（提及 Tinode 协议），
  改回真正的代码注释
- base.css：.risk-info-page（安全提醒整页）补 margin:0 auto——原来复用模态弹窗的 .risk-dialog 样式，
  宽屏下整块内容贴左显示，没有居中
- base.css：.group-member-picker/.group-settings-header/.group-member-section-title 的 strong/small
  漏加入既有的 line-height:1.3 覆盖名单，继承通用 button{line-height:2.2rem}，导致群成员列表/群聊设置
  头部的姓名与角色/简介文字行间距异常大、贴底部分割线过近

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

umd/index.dev.js

@@ -2358,7 +2358,7 @@ __webpack_require__.r(__webpack_exports__);
 /* harmony export */ });
 /* harmony import */ var _version_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./version.js */ "./src/version.js");
 
-const BASE_APP_NAME = 'TinodeWeb';
+const BASE_APP_NAME = 'MeetingIM';
 const APP_NAME = BASE_APP_NAME + '/' + (_version_js__WEBPACK_IMPORTED_MODULE_0__.PACKAGE_VERSION || '0.25');
 const API_KEY = "AQAAAAABAAAoeOI7tA3HsYvdzDhYhZJy" || 0;
 const KNOWN_HOSTS = {
@@ -15741,9 +15741,7 @@ function ChangePassword({
           onChange: e => setConfirmPwd(e.target.value),
           placeholder: "再次输入新密码"
         }, void 0, false)]
-      }, void 0, true), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_7__.jsxDEV)("p", {
-        children: "Tinode 协议本身不会在服务端校验\"原密码\"，这里的原密码输入是前端自己加的一道二次确认，防止误触。"
-      }, void 0, false)]
+      }, void 0, true)]
     }, void 0, true)]
   }, void 0, true);
 }

umd/src_views_messages-view_jsx.dev.js

@@ -13,45 +13,35 @@ __webpack_require__.r(__webpack_exports__);
 /* harmony export */ });
 /* harmony import */ var react__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! react */ "react");
 /* harmony import */ var react__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(react__WEBPACK_IMPORTED_MODULE_0__);
-/* harmony import */ var react_intl__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! react-intl */ "react-intl");
-/* harmony import */ var react_intl__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(react_intl__WEBPACK_IMPORTED_MODULE_1__);
-/* harmony import */ var tinode_sdk__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! tinode-sdk */ "tinode-sdk");
-/* harmony import */ var tinode_sdk__WEBPACK_IMPORTED_MODULE_2___default = /*#__PURE__*/__webpack_require__.n(tinode_sdk__WEBPACK_IMPORTED_MODULE_2__);
-/* harmony import */ var _config_js__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../config.js */ "./src/config.js");
-/* harmony import */ var react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! react/jsx-dev-runtime */ "./node_modules/react/jsx-dev-runtime.js");
-
-
+/* harmony import */ var _config_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../config.js */ "./src/config.js");
+/* harmony import */ var react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! react/jsx-dev-runtime */ "./node_modules/react/jsx-dev-runtime.js");
 
 
 
+function Icon({
+  children
+}) {
+  return (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("i", {
+    className: "material-icons",
+    "aria-hidden": "true",
+    children: children
+  }, void 0, false);
+}
 class LogoView extends (react__WEBPACK_IMPORTED_MODULE_0___default().PureComponent) {
   render() {
-    const version = _config_js__WEBPACK_IMPORTED_MODULE_3__.APP_NAME + ' (' + tinode_sdk__WEBPACK_IMPORTED_MODULE_2__.Tinode.getLibrary() + ')';
-    return (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("div", {
+    return (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("div", {
       id: "dummy-view",
-      children: (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("div", {
-        children: [(0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("a", {
-          href: "https://github.com/tinode/chat/",
-          children: [(0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("img", {
-            id: "logo",
-            alt: "logo",
-            src: "img/logo.svg"
-          }, void 0, false), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("h2", {
-            children: "Tinode Web"
-          }, void 0, false)]
-        }, void 0, true), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("p", {
-          children: [(0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)(react_intl__WEBPACK_IMPORTED_MODULE_1__.FormattedMessage, {
-            id: "label_client",
-            defaultMessage: "Client:",
-            description: "Label for a client version"
-          }, void 0, false), " ", version]
-        }, void 0, true), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)("p", {
-          children: [(0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_4__.jsxDEV)(react_intl__WEBPACK_IMPORTED_MODULE_1__.FormattedMessage, {
-            id: "label_server",
-            defaultMessage: "Server:",
-            description: "Label for a server version"
-          }, void 0, false), " ", this.props.serverVersion, " (", this.props.serverAddress, ")"]
-        }, void 0, true)]
+      children: (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("div", {
+        children: [(0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("span", {
+          id: "dummy-view-icon",
+          children: (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)(Icon, {
+            children: "forum"
+          }, void 0, false)
+        }, void 0, false), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("h2", {
+          children: _config_js__WEBPACK_IMPORTED_MODULE_1__.BASE_APP_NAME
+        }, void 0, false), (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_2__.jsxDEV)("p", {
+          children: "选择一个会话开始聊天"
+        }, void 0, false)]
       }, void 0, true)
     }, void 0, false);
   }
@@ -1841,10 +1831,7 @@ class MessagesView extends (react__WEBPACK_IMPORTED_MODULE_0___default().Compone
     }, void 0, false);
     let component;
     if (!this.state.topic) {
-      component = (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_22__.jsxDEV)(_logo_view_jsx__WEBPACK_IMPORTED_MODULE_10__["default"], {
-        serverVersion: this.props.serverVersion,
-        serverAddress: this.props.serverAddress
-      }, void 0, false);
+      component = (0,react_jsx_dev_runtime__WEBPACK_IMPORTED_MODULE_22__.jsxDEV)(_logo_view_jsx__WEBPACK_IMPORTED_MODULE_10__["default"], {}, void 0, false);
     } else {
       let component2;
       if (this.state.imagePreview) {