gh-153313: Run Emscripten PyRepl test in CI (#153701)

Adds the PyRepl test to the Github CI configuration for Emscripten.

Author: hoodmane

.github/workflows/reusable-emscripten.yml

@@ -77,3 +77,5 @@ jobs:
       run: python3 Platforms/emscripten pythoninfo-host
     - name: "Test"
       run: python3 Platforms/emscripten run --test
+    - name: "Test Repl"
+      run: Platforms/emscripten/browser_test/run_test.sh

Platforms/emscripten/browser_test/package-lock.json

@@ -10,10 +10,10 @@
   "license": "ISC",
   "description": "",
   "dependencies": {
-    "@playwright/test": "^1.54.1",
+    "@playwright/test": "^1.61.1",
     "@types/node": "^24.12.0",
     "get-port-cli": "^3.0.0",
     "http-server": "^14.1.1",
-    "playwright": "^1.54.1"
+    "playwright": "^1.61.1"
   }
 }

Platforms/emscripten/browser_test/package.json

@@ -2,10 +2,12 @@
 set -euo pipefail
 cd "$(dirname "$0")"
 rm -f test_log.txt
-echo "Installing node packages" | tee test_log.txt
+echo "Installing node packages" | tee -a test_log.txt
 npm ci >> test_log.txt 2>&1
-echo "Installing playwright browsers" | tee test_log.txt
+echo "Installing playwright browsers" | tee -a test_log.txt
 npx playwright install 2>> test_log.txt
-export PORT=$(npx get-port-cli)
-echo "Running tests with webserver on port $PORT" | tee test_log.txt
-CI=1 npx playwright test | tee test_log.txt
+# Disable color so FORCE_COLOR=1 (set in CI) doesn't wrap the port number in
+# ANSI escape codes, which would produce an invalid baseURL in Playwright.
+export PORT=$(FORCE_COLOR=0 npx get-port-cli)
+echo "Running tests with webserver on port $PORT" | tee -a test_log.txt
+CI=1 npx playwright test | tee -a test_log.txt