Fix invalid secrets syntax

.github/workflows/playwright.yml

@@ -30,9 +30,13 @@ jobs:
           echo "✅ Required secrets validated"
 
       - name: Test Grafana Cloud Loki Connection
-        if: ${{ secrets.GRAFANA_LOKI_URL != '' }}
         continue-on-error: true
         run: |
+          if [ -z "${{ secrets.GRAFANA_LOKI_URL }}" ]; then
+            echo "⏭️  Skipping Loki connection test (GRAFANA_LOKI_URL not configured)"
+            exit 0
+          fi
+          
           echo "🔍 Testing Grafana Cloud Loki connection..."
           timestamp=$(date +%s)000000000
           
@@ -90,9 +94,13 @@ jobs:
         run: npx playwright install --with-deps ${{ matrix.browser }}
       
       - name: Send Test Start Event to Loki
-        if: ${{ secrets.GRAFANA_LOKI_URL != '' }}
         continue-on-error: true
         run: |
+          if [ -z "${{ secrets.GRAFANA_LOKI_URL }}" ]; then
+            echo "⏭️  Skipping Loki logging (GRAFANA_LOKI_URL not configured)"
+            exit 0
+          fi
+          
           timestamp=$(date +%s)000000000
           
           response=$(curl -s -w "\n%{http_code}" \
@@ -168,9 +176,14 @@ jobs:
           fi
 
       - name: Send Test Results to Loki
-        if: always() && secrets.GRAFANA_LOKI_URL != ''
+        if: always()
         continue-on-error: true
         run: |
+          if [ -z "${{ secrets.GRAFANA_LOKI_URL }}" ]; then
+            echo "⏭️  Skipping Loki logging (GRAFANA_LOKI_URL not configured)"
+            exit 0
+          fi
+          
           STATUS="${{ steps.playwright-run.outputs.test_exit_code == '0' && 'success' || 'failure' }}"
           timestamp=$(date +%s)000000000