feat(brand+promotion): brand-gradient system, restyled /about/* + team + contact, alias-based client matcher

Three coupled rollouts in one shot.

PART A — client highlight matcher (DB migration applied separately):
- promoted-articles.ts: AdvertiserName now carries brand_aliases; matcher
  iterates legal name + every alias with word-boundary regex and picks the
  longest match across all candidates so "Magewell Launches…" resolves to
  "Magewell Electronics Co., Ltd." via its Magewell alias.
- New isStoryAboutClient gate: hard-accept at position 0, accept if any
  editorial frame ("Product Spotlight:", "Review:", "First Look", …) appears
  in the prefix, hard-reject if the prefix ends with a partner/usage phrase
  ("with", "using", "powered by", "dealer of", "integration with", "used",
  "deploys", "runs on", "leverages", …), otherwise accept within a 32-char
  subject window. Validated against 5,000 historical posts: 27 partner
  false-positives blocked, 3 editorial-frame stories correctly saved, the
  Magewell article now highlights.

PART B — restyling /about, /about/team, /about/contact:
- New .brand-gradient utility: #2563EB→#1E3A8A linear-gradient with a
  16%-opacity diagonal sheen that sweeps in the first 30% of a 7s cycle
  and rests offscreen-right for the rest. Respects prefers-reduced-motion
  (band parked statically at 6% opacity).
- Team page: dark legacy hero (red radial, #ff5a55 eyebrows) replaced with
  brand-gradient hero; outer text wrapper #e5e7eb → #0F172A so section
  headings stop being white-on-white; all serif H1/H2/H3 → font-display;
  red accents (#ff5a55 / #ff6b66 / rgba(214,7,1)) → blue (#93C5FD / #7DD3FC
  / rgba(29,78,216)).
- About page: H1 + Stat values → font-display; Stat cards get a brand-
  gradient top stripe.
- Contact page: outer wrapper #e5e7eb → #0F172A (fixes the white-on-white
  Contact H1); H1 gets explicit text-[#0F172A] + font-display; dark contact
  cards keep dark bg but gain a brand-gradient top stripe + explicit
  text-[#e5e7eb] body + brighter cyan eyebrow/link colors.

PART C — richer Industry News client highlight:
- ArticleFeed: client-promoted row swaps the static border-l-4 for an
  absolute-positioned .brand-gradient strip on the left edge (sheen pulses
  through). Row gets a slightly richer bg tint (from-#1D4ED8/12 via /4).
- HIGHLIGHT pill now uses .brand-gradient instead of the static blue chip.

Also shipping the earlier-staged work:
- AnimatedLogo onDark: white ring around tile + brighter (#E2E8F0) tagline
  + cyan accent rule for the blue header.
- Article-prose: em/strong/code dark colors (em fixes the trailing
  copyright/trademark ghost text), hr line color, figcaption readable.
- ArticleComments: "Sign in to join the discussion" bar uses brand-gradient
  + white/outline buttons that read on blue.
- Forum: Discover/Following, Newest/Top Voted/Unanswered, Sign in to post,
  Start a thread, Create account — slim pills, brand-gradient active.

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

src/app/forum/[slug]/page.tsx

@@ -299,14 +299,14 @@ export default function ForumCategoryPage() {
               {isAuthenticated ? (
                 <button
                   onClick={() => setShowNewThread(!showNewThread)}
-                  className="flex-shrink-0 bg-[#1D4ED8] hover:bg-[#1E3A8A] text-white font-body font-semibold text-sm px-4 py-2 rounded-lg transition-colors"
+                  className="brand-gradient flex-shrink-0 font-body font-semibold text-sm px-4 py-2 rounded-full"
                 >
                   + New Thread
                 </button>
               ) : (
                 <Link
                   href={`/forum/login?next=${typeof window === 'undefined' ? '/forum' : encodeURIComponent(window.location.pathname)}`}
-                  className="flex-shrink-0 bg-[#1D4ED8] hover:bg-[#1E3A8A] text-white font-body font-semibold text-sm px-4 py-2 rounded-lg transition-colors"
+                  className="brand-gradient flex-shrink-0 font-body font-semibold text-sm px-4 py-2 rounded-full"
                 >
                   Sign in to post
                 </Link>
@@ -393,16 +393,16 @@ export default function ForumCategoryPage() {
               )}
             </div>
 
-            {/* Sort Options */}
-            <div className="flex gap-1 bg-[#FFFFFF] border border-[#DCE6F2] rounded-lg p-1 flex-shrink-0">
+            {/* Sort Options — segmented pill control; active uses brand-gradient */}
+            <div className="flex gap-1 bg-[#FFFFFF] border border-[#DCE6F2] rounded-full p-1 flex-shrink-0">
               {sortOptions.map(opt => (
                 <button
                   key={opt.value}
                   onClick={() => setSort(opt.value)}
-                  className={`px-3 py-1.5 rounded-md text-xs font-body font-semibold transition-colors whitespace-nowrap ${
+                  className={`px-3 py-1 rounded-full text-xs font-body font-semibold transition-colors whitespace-nowrap ${
                     sort === opt.value
-                      ? 'bg-[#1D4ED8] text-white'
-                      : 'text-[#888] hover:text-[#0F172A]'
+                      ? 'brand-gradient'
+                      : 'text-[#475569] hover:text-[#0F172A]'
                   }`}
                 >
                   {opt.label}