feat: update CLI workflow to use Node.js 20/24

NODE.JS VERSION UPDATE: Modernize CLI testing matrix

Changes:
✅ Updated Node.js matrix from [18, 20] to [20, 24]
✅ Updated coverage upload condition from Node.js 20 to Node.js 24
✅ Fixed workspace path in coverage upload step

Rationale:
- Current environment runs Node.js 24.13.0
- Node.js 18 is outdated and no longer needed
- Node.js 20 provides LTS stability
- Node.js 24 provides latest features and performance
- Coverage reports now generated with current Node.js version

Matrix Testing:
- Node.js 20: LTS stability testing
- Node.js 24: Current version testing (matches production)

This ensures CLI testing is done with current and supported Node.js versions
that match the actual production environment.

.gitea/workflows/cli-level1-tests.yml

@@ -21,7 +21,7 @@ jobs:
     
     strategy:
       matrix:
-        node-version: [18, 20]
+        node-version: [20, 24]
         
     steps:
       - name: Nuclear fix - absolute path control
@@ -126,9 +126,9 @@ jobs:
           fi
 
       - name: Upload coverage reports
-        if: matrix.node-version == '20'
+        if: matrix.node-version == '24'
         run: |
-          cd /opt/gitea-runner/workspace/repo
+          cd /opt/gitea-runner/cli-workspace/repo
           if [ -f "package.json" ]; then
             npm run test:coverage || echo "Coverage completed"
           else