Merge remote-tracking branch 'origin/master' into fix/focus-ring-brand-primary

Conflicts and how they were resolved:

- ui-agent-preset/AgentPresetSection.module.css: master replaced the icon-only
  tooltip actions (`.iconButton`, `.iconDanger`, `.revealedPath`) with
  `.cardHelp` + `.helpButton`, which deleted the one declaration this branch
  edited. Took master's structure and re-applied the branch's change to the two
  `.cardMain:focus-visible` rings, which master kept unchanged.
- ui-theme/README.md and README.zh.md: master documented the separately exported
  `brand-font.css`; this branch documented `focus.css`. Kept both, with the
  dynamic entry's sheet list at seven sheets including `focus.css`.
  `README.i18n.yaml` re-recorded with `verify-translation-pairing --write`.

packages/client/ui-plugin-manager/src/client/PluginManagerPage.module.css

@@ -202,6 +202,10 @@
   color: var(--dsw-alias-label-secondary);
 }
 
+.packageImage {
+  object-fit: contain;
+}
+
 .cardMain {
   flex: 1;
   min-width: 0;
@@ -1112,13 +1116,13 @@ label.registryOption {
   line-height: 22px;
 }
 
-/* The package name under the title: the exact spec that installs the package
-   elsewhere, where a title of its own or a shortened name hides it. */
+/* The package or row identity under the title: the exact spec that installs the
+   package elsewhere, where a title of its own or a shortened name hides it. */
 .detailName {
   margin: 0;
   font-size: 12px;
   line-height: 18px;
-  color: var(--dsw-alias-label-caption);
+  color: var(--dsw-alias-label-tertiary);
   overflow-wrap: anywhere;
 }