Add frontend tests workflow and update paths for Go and TypeScript workflows

.github/workflows/frontend-tests.yml

@@ -0,0 +1,39 @@
+name: Frontend Tests
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - "*"
+    paths:
+      - "app/**"
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    name: Run Frontend Tests
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./app
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "npm"
+          cache-dependency-path: "./app/package-lock.json"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run Vitest tests
+        run: npm test