fix(contrast,brand): full audit sweep — white-on-white + cross-component renames

- forum/page.tsx: text-white → navy on TopThreads, Following feed, Discover feed cards, search input, select, category grid, Community Guidelines; greys lightened where applicable for new white surface
- forum/[slug]/page.tsx: same sweep for category page (h1, h2, thread rows, new-thread form, search/sort bar) + hover:bg-[#1e2a3a] → slate-200
- forum/user/[username]/page.tsx: text-[#cccccc]/[#bfbfbf]/[#e0e0e0] + bg-[#222] tag chip + #9ca3af labels → readable on white card
- authors/[slug]/page.tsx: profile contact/facts cards readable
- search/page.tsx: h1 + h2 navy + hover slate
- news/[slug]/NewsArticleDetailClient.tsx: toast color
- news/NewsPageClient.tsx: import cleanExcerpt, strip HTML from listing excerpts
- privacy/terms/page.tsx: h1 + h2 + body greys to readable navy/slate
- error.tsx: page-level text to navy + button border slate
- about/page.tsx: page body text + Stat/Block cards to white surface w/ navy text
- Header.tsx: mobile hamburger + dropdown links → readable navy + slate border
- NotificationCenter.tsx: hover + unread bg flipped to light blue
- AISuggestedArticles.tsx: hover bg → slate-200
- Footer.tsx: link greys to #475569 + #DCE6F2 borders
- AskBBAI.tsx: copy rename 'BB AI' → 'AV Beat AI' (greeting, button, header, aria)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/search/page.tsx

@@ -35,7 +35,7 @@ export default async function SearchPage({ searchParams }: SearchPageProps) {
             <span className="section-label">Search</span>
             <div className="flex-1 h-px bg-[#DCE6F2]" />
           </div>
-          <h1 className="font-heading text-white text-3xl font-bold">
+          <h1 className="font-heading text-[#0F172A] text-3xl font-bold">
             {query ? `Results for "${query}"` : "Search AV Beat"}
           </h1>
           <p className="text-[#777] font-body text-sm mt-2">
@@ -64,7 +64,7 @@ export default async function SearchPage({ searchParams }: SearchPageProps) {
               <Link
                 key={article.slug}
                 href={`/news/${article.slug}`}
-                className="flex gap-4 py-5 border-b border-[#222] group hover:bg-[#111] transition-colors px-2 -mx-2"
+                className="flex gap-4 py-5 border-b border-[#DCE6F2] group hover:bg-[#e2e8f0] transition-colors px-2 -mx-2 rounded-sm"
               >
                 <div className="flex-shrink-0 w-[160px] h-[105px] relative overflow-hidden rounded-sm">
                   <AppImage
@@ -81,7 +81,7 @@ export default async function SearchPage({ searchParams }: SearchPageProps) {
                       {article.category || "NEWS"}
                     </span>
                   </div>
-                  <h2 className="font-heading text-[#e0e0e0] text-base font-bold leading-snug mb-2 group-hover:text-[#1D4ED8] transition-colors line-clamp-2">
+                  <h2 className="font-heading text-[#0F172A] text-base font-bold leading-snug mb-2 group-hover:text-[#1D4ED8] transition-colors line-clamp-2">
                     {article.title || "Untitled"}
                   </h2>
                   <p className="text-[#777] font-body text-sm leading-relaxed line-clamp-2">