fix(client): scope PluginTooltip link styles to stop a global CSS leak

styles.module.css used a bare `a` element selector, which CSS Modules does NOT hash — it leaked a global `a { color: white }` app-wide (and into the docs site), whiting out unstyled links in light contexts. Scope it to `.tooltipHtml a` and apply the class on the injected-HTML container.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/frontend/client/src/components/Plugins/Store/PluginTooltip.tsx

@@ -1,5 +1,5 @@
 import { HoverCardPortal, HoverCardContent } from '~/components/ui';
-import './styles.module.css';
+import styles from './styles.module.css';
 
 type TPluginTooltipProps = {
   content: string;
@@ -12,7 +12,7 @@ function PluginTooltip({ content, position }: TPluginTooltipProps) {
       <HoverCardContent side={position} className="w-80 ">
         <div className="space-y-2">
           <div className="text-sm text-gray-600 dark:text-gray-300">
-            <div dangerouslySetInnerHTML={{ __html: content }} />
+            <div className={styles.tooltipHtml} dangerouslySetInnerHTML={{ __html: content }} />
           </div>
         </div>
       </HoverCardContent>

src/frontend/client/src/components/Plugins/Store/styles.module.css

@@ -1,4 +1,8 @@
-a {
+/* Scoped to the tooltip's injected HTML. The old bare `a` element selector is
+   NOT hashed by CSS modules — it leaked a global `a { color: white }` into the
+   whole app (and the docs site), turning unstyled links white-on-white in
+   light contexts. */
+.tooltipHtml a {
   text-decoration: underline;
   color: white;
 }