修复群资料页头像被拉伸变形，成员数改为跟列表一致的可点击行

- .group-profile > button > span 漏排除 .group-avatar，把只该用于文字标签列对齐的
  min-width:6rem 也套到了头像 span 上，头像被横向拉伸成80px宽的长方形而不是正方形
- 底部"N位成员"原来是一个孤立的灰底纯文本 <p>，样式和上面的列表格格不入；改成与其它
  行一致的可点击行，点击跳转真实的群成员列表页（复用群聊设置页已验证过的同一个跳转）

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

css/base.css

@@ -10335,7 +10335,11 @@ div.toast.show {
   gap: 0.7rem;
 }
 
-.group-profile > button > span,
+/* :not(.group-avatar) exclusion needed for the same reason as .group-settings-header's own
+   (see its comment): this selector is scoped only by tag+ancestor, so without it also matches
+   .group-profile-avatar's leading Avatar span and forces it to the label column's 6rem min-width
+   -- stretching what should be a small square avatar into an 80px-wide rectangle. */
+.group-profile > button > span:not(.group-avatar),
 .group-profile > label > span {
   min-width: 6rem;
 }
@@ -10365,12 +10369,6 @@ div.toast.show {
   height: 3.5rem;
 }
 
-.group-profile > p {
-  padding: 0.7rem 1rem;
-  color: #8c939c;
-  font-size: 0.76rem;
-}
-
 .group-edit-text {
   width: min(100%, 42rem);
   margin: 0 auto;