feat(i18n): update en/zh-CN copy for redesigned pages

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

messages/en.json

@@ -12,7 +12,7 @@
     "contact": "Contact",
     "explore": "Explore",
     "toggleMenu": "Toggle menu",
-    "applyTrial": "Apply for trial",
+    "applyTrial": "Contact us",
     "groups": {
       "product": "Product",
       "content": "Content"
@@ -20,13 +20,13 @@
     "groupLinks": {
       "home": "Home",
       "whyDalCode": "Why DAL Code",
-      "applyTrial": "Apply for trial",
+      "applyTrial": "Contact us",
       "insights": "Product insights",
       "buildingRoles": "Build areas"
     }
   },
   "footer": {
-    "applyTrial": "Apply for trial",
+    "applyTrial": "Contact us",
     "learnPositioning": "Learn positioning",
     "copyright": "Copyright © 2026 DAL Code by DeepAILab. This website continues to evolve on the existing Next.js foundation.",
     "groups": {