ci: remove approval step from auto-merge workflow

Approval fails with "approve your own pull is not allowed" since
the token belongs to the repo owner. Merge works without it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/auto-merge-docs.yml

@@ -39,7 +39,7 @@ jobs:
 
           echo "docs_only=${DOCS_ONLY}" >> "$GITHUB_OUTPUT"
 
-      - name: Approve and merge
+      - name: Auto-merge
         if: steps.check.outputs.docs_only == 'true'
         env:
           GITEA_TOKEN: ${{ secrets.AUTO_MERGE_TOKEN }}
@@ -47,27 +47,9 @@ jobs:
           PR_NUMBER=${{ github.event.pull_request.number }}
           API_BASE="${{ github.server_url }}/api/v1/repos/${{ github.repository }}/pulls/${PR_NUMBER}"
 
-          # Approve the PR
-          echo "Approving PR #${PR_NUMBER}..."
-          APPROVE_RESP=$(curl -s -w "\nHTTP_%{http_code}" -X POST "${API_BASE}/reviews" \
+          curl -sf -X POST "${API_BASE}/merge" \
             -H "Authorization: token ${GITEA_TOKEN}" \
             -H "Content-Type: application/json" \
-            -d '{"event": "APPROVED", "body": "Auto-approved: docs-only changes (all .md files)."}')
-          echo "$APPROVE_RESP"
+            -d '{"Do": "merge", "merge_message_field": "Auto-merge: docs-only PR #'"${PR_NUMBER}"'"}'
 
-          # Merge the PR
-          echo "Merging PR #${PR_NUMBER}..."
-          MERGE_RESP=$(curl -s -w "\nHTTP_%{http_code}" -X POST "${API_BASE}/merge" \
-            -H "Authorization: token ${GITEA_TOKEN}" \
-            -H "Content-Type: application/json" \
-            -d '{"Do": "merge", "merge_message_field": "Auto-merge: docs-only PR #'"${PR_NUMBER}"'"}')
-          echo "$MERGE_RESP"
-
-          # Check for failure
-          HTTP_CODE=$(echo "$MERGE_RESP" | tail -1)
-          if [[ "$HTTP_CODE" =~ HTTP_4[0-9][0-9] || "$HTTP_CODE" =~ HTTP_5[0-9][0-9] ]]; then
-            echo "Merge failed!"
-            exit 1
-          fi
-
-          echo "PR #${PR_NUMBER} auto-approved and merged."
+          echo "PR #${PR_NUMBER} auto-merged."