feat(web): redesign homepage with solutions showcase + tabbed featured section

- Add "Giải pháp GoodGo" section after hero with 4 feature cards
  linking to the platform's core products: Dự án, Khu công nghiệp,
  Chuyển nhượng, Định giá BĐS.
- Convert "Tin đăng nổi bật" from residential-only 3-column grid into a
  tabbed section with one tab per core feature. Items render as a
  vertical list of horizontal cards (image left, title/location/meta
  right, price + arrow). Valuation tab shows a highlight CTA since it's
  a tool, not a listing type.
- Remove "Khu vực nổi bật" district quick-links block (didn't fit the
  platform's multi-product positioning).
- Fix invisible "Tìm kiếm ngay" button on CTA section — outline variant
  defaulted to bg-background (white) masking text-primary-foreground
  (white) on the primary background.

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

apps/web/messages/en.json

@@ -65,13 +65,32 @@
     "heroSubtitle": "Smart real estate platform in Vietnam — buy, sell, and rent properties with ease",
     "searchPlaceholder": "Enter area, project, or keyword...",
     "transactionTypeLabel": "Type",
+    "featuresTitle": "GoodGo solutions",
+    "featuresSubtitle": "Four core services for Vietnam's real estate market",
+    "features": {
+      "explore": "Explore",
+      "projects": {
+        "title": "Projects",
+        "description": "Discover the latest apartment, villa, and residential projects"
+      },
+      "industrial": {
+        "title": "Industrial parks",
+        "description": "Find industrial land, factories, and warehouses for rent or sale"
+      },
+      "transfer": {
+        "title": "Transfers",
+        "description": "Transfer business premises, offices, and retail spaces"
+      },
+      "valuation": {
+        "title": "Property valuation",
+        "description": "AI-powered valuation based on real market data"
+      }
+    },
     "featuredTitle": "Featured listings",
     "featuredSubtitle": "Explore the most popular properties",
     "viewAll": "View all",
     "loadError": "Unable to load listings. Please try again.",
     "noFeatured": "No featured listings yet",
-    "districtsTitle": "Popular areas",
-    "districtsSubtitle": "Search by popular districts",
     "statsTitle": "GoodGo in numbers",
     "statsSubtitle": "Vietnam's trusted real estate platform",
     "ctaTitle": "Have a property to list?",