fix(help): give the close button a row of its own

A wider gutter left the button floating in the corner over the first card and the scrollbar. It now sits in its own row above the scrolling content, level with the Help title, and the content keeps symmetric padding.

client/src/components/Help/HelpPanel.tsx

@@ -102,18 +102,20 @@ export default function HelpPanel(): React.ReactElement | null {
           <HelpNav context={context} currentId={contextId} activeGuideId={!searching && guide ? guide.id : null} />
 
           <div className="relative flex flex-col min-h-0 bg-surface" role="main">
-            <button
-              type="button"
-              onClick={closeHelp}
-              aria-label={t('help.center.close')}
-              className="absolute top-4 end-4 z-10 w-9 h-9 rounded-full flex items-center justify-center text-content-muted bg-surface-card border border-edge shadow-card hover:text-content hover:bg-surface-hover transition-colors"
-            >
-              <X className="w-4 h-4" />
-            </button>
-            {/* The close button floats over the scroll area, so the content keeps its own
-                gutter clear of it on the end side. */}
+            {/* The close button sits in a row of its own above the scrolling content rather
+                than floating over it, so no card ever runs up against it. */}
+            <div className="flex shrink-0 justify-end px-4 pt-4">
+              <button
+                type="button"
+                onClick={closeHelp}
+                aria-label={t('help.center.close')}
+                className="w-9 h-9 rounded-full flex items-center justify-center text-content-muted bg-surface-card border border-edge shadow-card hover:text-content hover:bg-surface-hover transition-colors"
+              >
+                <X className="w-4 h-4" />
+              </button>
+            </div>
             <div ref={scrollRef} className="trek-help-scroll flex-1 min-h-0 overflow-y-auto overscroll-contain">
-              <div className="max-w-[1080px] mx-auto ps-6 pe-16 sm:ps-10 sm:pe-20 py-8">
+              <div className="max-w-[1080px] mx-auto px-6 sm:px-10 pt-4 pb-8">
                 {searching ? (
                   <HelpSearchResults key="search" />
                 ) : guide ? (