fix: complete Playwright removal in CI deploy workflow

Drop the leftover Playwright browser install and e2e smoke test from the deployment script, and update the deployment contract tests to cover the verify-deployed-release smoke check instead.

src/test/ci-deploy-harness.sh

@@ -13,7 +13,6 @@ flock() { echo "lock" >> "$TEST_DIR/calls"; [ "$SCENARIO" != lock-failure ]; }
 pnpm() {
   echo "pnpm $*" >> "$TEST_DIR/calls"
   if [ "$1" = db:migrate ] && [ "$SCENARIO" = migration-failure ]; then return 1; fi
-  if [ "$1" = test:e2e ] && [ "$SCENARIO" = smoke-failure ]; then return 1; fi
   return 0
 }
 curl() {
@@ -43,5 +42,12 @@ docker() {
 }
 export -f git flock pnpm curl sleep docker
 
-node() { echo "node $*" >> "$TEST_DIR/calls"; [ "$SCENARIO" != release-failure ]; }
+node() {
+  echo "node $*" >> "$TEST_DIR/calls"
+  case "$SCENARIO" in
+    release-failure) return 1 ;;
+    smoke-failure) case "$*" in *verify-deployed-release.mjs*) return 1 ;; esac ;;
+  esac
+  return 0
+}
 export -f node