chore: various trivial fixes (#38070)

Follow-up to #37987, addressing the unresolved review comments on the
org members search form.

And fix more trivial problems together (see the commit titles)

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/css/base.css

@@ -278,6 +278,7 @@ a {
 
 a:hover {
   text-decoration-line: underline;
+  text-underline-position: under; /* necessary for CJK fonts, otherwise, default "auto" makes the underline cross-over the CJK text bottom */
 }
 
 /* a = always colored, underlined on hover */