ci: fix workflows for pull requests

Author: SlimDeluxe

.github/workflows/linter.yml

@@ -22,7 +22,10 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          # Checkout the actual branch, not a specific commit
+          ref: ${{ github.head_ref || github.ref_name }}
+          # Fetch the full history to avoid shallow clone issues
+          fetch-depth: 0
 
       - name: Run Laravel Pint
         uses: aglipanci/laravel-pint-action@latest

.github/workflows/test-runner.yml

@@ -28,7 +28,7 @@ jobs:
       matrix:
         os: [ ubuntu-latest ]
         php: [ 8.2, 8.3, 8.4 ]
-        dependency-version: [ prefer-lowest, prefer-stable ]
+        dependency-version: [ prefer-stable ]
 
     name: ${{ matrix.os }} / PHP ${{ matrix.php }} / ${{ matrix.dependency-version }}
 
@@ -41,7 +41,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
 
       - name: Validate composer.json and composer.lock
         run: composer validate --strict