fix: include landing page in version sync and clean up release notes

scripts/sync-version.sh

@@ -15,6 +15,7 @@ PACKAGES=(
   "apps/web/package.json"
   "apps/api/package.json"
   "apps/docs/package.json"
+  "apps/landing/package.json"
   "packages/shared/package.json"
   "packages/image-engine/package.json"
   "packages/ai/package.json"
@@ -44,4 +45,7 @@ if [ -f "$CONSTANTS" ]; then
   echo "  Updated APP_VERSION -> $VERSION"
 fi
 
+# Clean up release notes file (consumed by CI, not needed after release commit)
+rm -f "$ROOT/.release-notes.md"
+
 echo "All versions synced to $VERSION"