Fix various UI bugs (#32821)

web_src/css/repo/clone.css

@@ -1,11 +1,14 @@
 /* only used by "repo/empty.tmpl" */
 .clone-buttons-combo {
+  display: flex;
+  align-items: center;
   flex: 1;
 }
 
 .clone-buttons-combo input {
   border-left: none !important;
   border-radius: 0 !important;
+  height: 30px;
 }
 
 /* used by the clone-panel popup */

web_src/css/repo/home-file-list.css

@@ -44,6 +44,10 @@
   padding: 6px 10px;
 }
 
+#repo-files-table .repo-file-last-commit {
+  background: var(--color-box-header);
+}
+
 #repo-files-table .repo-file-cell.name {
   max-width: 300px;
   white-space: nowrap;
@@ -59,6 +63,7 @@
 }
 
 #repo-files-table .repo-file-cell.age {
+  text-align: right;
   white-space: nowrap;
   color: var(--color-text-light-1);
 }

web_src/js/markup/math.ts

@@ -1,9 +1,8 @@
 import {displayError} from './common.ts';
 
 function targetElement(el: Element) {
-  // The target element is either the current element if it has the
-  // `is-loading` class or the pre that contains it
-  return el.classList.contains('is-loading') ? el : el.closest('pre');
+  // The target element is either the parent "code block with loading indicator", or itself
+  return el.closest('.code-block.is-loading') ?? el;
 }
 
 export async function renderMath(): Promise<void> {