Fix GITHUB_TOKEN environment variable and update issue closing method to use Gitea API

.gitea/workflows/pr-close-issue.yml

@@ -17,7 +17,7 @@ jobs:
 
       - name: Extract issue number and close issue
         env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           BRANCH_NAME="${{ github.event.pull_request.head.ref }}"
           echo "Branch name: $BRANCH_NAME"
@@ -27,8 +27,20 @@ jobs:
             ISSUE_NUMBER="${BASH_REMATCH[1]}"
             echo "Found issue number: $ISSUE_NUMBER"
 
-            # Close the issue
-            gh issue close "$ISSUE_NUMBER" --comment "Automatically closed by PR #${{ github.event.pull_request.number }}"
+            # Close the issue using Gitea API
+            curl -X PATCH \
+              -H "Authorization: token ${GITHUB_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d '{"state":"closed"}' \
+              "${{ github.api_url }}/repos/${{ github.repository }}/issues/${ISSUE_NUMBER}"
+            
+            # Add a comment
+            curl -X POST \
+              -H "Authorization: token ${GITHUB_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d "{\"body\":\"Automatically closed by PR #${{ github.event.pull_request.number }}\"}" \
+              "${{ github.api_url }}/repos/${{ github.repository }}/issues/${ISSUE_NUMBER}/comments"
+            
             echo "Issue #$ISSUE_NUMBER has been closed"
           else
             echo "Branch name does not match expected format (issue-NUMBER-title)"