fix: resolve review feedback F1 (CCIS deliverables WG scope), F2 (4 Core Research Areas), AC-32 check, and N1-N3 cleanups

refer_landing_page/scripts/run_e2e_tests.py

@@ -33,6 +33,7 @@ EXPECTED_SSG_ROUTES = [
     os.path.join(".next", "server", "app", "_not-found.html"),
     os.path.join(".next", "server", "app", "robots.txt.body"),
     os.path.join(".next", "server", "app", "sitemap.xml.body"),
+    os.path.join(".next", "server", "pages", "404.html"),
 ]
 
 def run_cmd(cmd, cwd=REFER_DIR):
@@ -154,7 +155,7 @@ def test_unittest_suite():
     if res.returncode != 0:
         print(f"❌ Unittest suite failed:\n{res.stdout}\n{res.stderr}")
         return False
-    print("✅ Gate 7 PASSED: All 6 DOM & static HTML content assertion tests passed")
+    print("✅ Gate 7 PASSED: All 7 DOM & static HTML content assertion tests passed")
     return True
 
 def test_layout_architecture():