feat: comprehensive seed, Lucide icons, grouped dashboard nav, API fixes

- Rewrite prisma/seed.ts to populate all 27 models with realistic
  Vietnamese real estate data (8 users with login, 10 properties,
  10 listings, orders, payments, reviews, notifications, etc.)
- Replace all emoji icons with Lucide React SVG icons across frontend
  for consistent rendering, sizing, and accessibility
- Redesign dashboard nav: grouped sidebar with section headers,
  primary/secondary split on desktop, icon-only secondary items
- Replace language switcher flag emoji with Globe icon
- Replace SVG theme toggle with Lucide Moon/Sun icons
- Fix API startup: graceful fallback for Sentry profiling, Google OAuth,
  and Zalo OAuth when credentials are not configured
- Relax rate limiting in development mode (10k req/min)
- Fix listings API to include media[] array in search response
- Add optional chaining for property.media across frontend components
- Update OAuth strategy tests to match graceful fallback behavior

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

apps/web/components/comparison/comparison-table.tsx

@@ -74,9 +74,9 @@ export function ComparisonTable({ listings, onRemove }: ComparisonTableProps) {
                 <div className="flex flex-col items-center gap-2">
                   {/* Image */}
                   <div className="relative aspect-[4/3] w-full max-w-[200px] overflow-hidden rounded-md bg-muted">
-                    {listing.property.media.length > 0 ? (
+                    {(listing.property.media?.length ?? 0) > 0 ? (
                       <Image
-                        src={listing.property.media[0]?.url ?? ''}
+                        src={listing.property.media![0]?.url ?? ''}
                         alt={listing.property.title}
                         fill
                         sizes="200px"