Fix PR comments for forked submissions

.github/workflows/pr-check-pictures.yml

@@ -1,7 +1,7 @@
 name: "Check new board assets exist (images + vendor logos)"
 
 on:
-  pull_request:
+  pull_request_target:
     paths:
       - "config/boards/**"
 
@@ -20,6 +20,7 @@ jobs:
     permissions:
       contents: read
       pull-requests: write
+      issues: write
 
     steps:
       - name: "Checkout build repo (PR head)"
@@ -71,12 +72,11 @@ jobs:
           comment_file="$(mktemp)"
 
           {
-            echo ""
             echo "This PR adds new board configuration(s). Required assets must already exist in [github/${WEBSITE_REPO}](https://github.com/${WEBSITE_REPO})."
             echo "They are required by [Armbian Imager](https://github.com/armbian/imager) to ensure all boards are displayed with proper images."
             echo ""
-            echo "- Board images: \`${BOARD_IMAGES_DIR}/<board>.png\`"
-            echo "- Vendor logos: \`${VENDOR_LOGOS_DIR}/<vendor>-logo.png\`"
+            echo "- Board images: \`${BOARD_IMAGES_DIR}/<board>.png\` (1920x1080 px transparent)"
+            echo "- Vendor logos: \`${VENDOR_LOGOS_DIR}/<vendor>-logo.png\` (512x512 px transparent)"
             echo ""
             echo "### Missing items"
             echo ""
@@ -126,7 +126,7 @@ jobs:
             if [[ -z "${found_logo}" ]]; then
               {
                 echo "- ❌ **Vendor logo missing** for vendor \`${vendor}\` (used by board \`${board}\`)"
-                echo "  - Expected: \`${VENDOR_LOGOS_DIR}/${vendor}-logo.(png|jpg|jpeg|svg)\`"
+                echo "  - Expected: \`${VENDOR_LOGOS_DIR}/${vendor}-logo.png\`"
                 echo "  - Fix: add the file to **${WEBSITE_REPO}** (folder \`${VENDOR_LOGOS_DIR}/\`)"
                 echo "  - Naming rules: lowercase, dashes (e.g. \`kobol-logo.png\`, not \`Kobol_logo.png\`)"
                 echo ""
@@ -146,7 +146,7 @@ jobs:
           fi
 
       - name: "Comment on PR with missing asset instructions"
-        if: always() && github.event_name == 'pull_request' && steps.validate.outputs.missing == 'true'
+        if: always() && github.event_name == 'pull_request_target' && steps.validate.outputs.missing == 'true'
         uses: actions/github-script@v7
         env:
           COMMENT_BODY: ${{ steps.validate.outputs.comment }}
@@ -161,7 +161,6 @@ jobs:
 
             Once the missing files are added (or a PR is opened in **${process.env.WEBSITE_REPO}**), re-run this check.
             `;
-                    
             await github.rest.issues.createComment({
               owner: context.repo.owner,
               repo: context.repo.repo,