Address pull request comments

.github/workflows/test.yml

@@ -14,12 +14,11 @@ on:
       - 'main'
 
 jobs:
-  build:
+  test-backend:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
-        node-version: ['20.x']
+        python-version: ["3.9", "3.12"]
 
     services:
       postgres:
@@ -61,10 +60,14 @@ jobs:
       - name: Test with pytest
         run: |
           cd backend && pytest
+  test-frontend:
+    runs-on: ubuntu-latest
+
+    steps:
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: '20.x'
           cache: 'npm'
           cache-dependency-path: './frontend/package-lock.json'
       - name: Install frontend dependencies