Flatten dashboard sections and emphasize data regions

app/search/page.tsx

@@ -196,7 +196,7 @@ function SearchPageContent() {
           </form>
         </Panel>
 
-        <Panel title="Cited Answer" subtitle="Single-turn answer grounded only in retrieved evidence.">
+        <Panel title="Cited Answer" subtitle="Single-turn answer grounded only in retrieved evidence." variant="surface">
           {answer ? (
             <div className="space-y-3">
               <p className="whitespace-pre-wrap text-sm leading-7 text-[color:var(--terminal-bright)]">{answer.answer}</p>
@@ -226,6 +226,7 @@ function SearchPageContent() {
       <Panel
         title="Semantic Search"
         subtitle={query ? `${results.length} results${ticker ? ` for ${ticker}` : ''}.` : 'Search results will appear here.'}
+        variant="surface"
       >
         {error ? <p className="text-sm text-[#ffb5b5]">{error}</p> : null}
         {loading ? (