Fix deploy pipeline: strip refs/heads/ prefix from dispatch ref input

inputs.ref resolves fully-qualified (refs/heads/main) rather than the
declared default "main", so git clone --branch was failing with
"Remote branch refs/heads/main not found".

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitea/workflows/deploy-backoffice.yml

@@ -25,10 +25,13 @@ jobs:
       - name: Checkout
         env:
           DEPLOY_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
+          DEPLOY_REF: ${{ inputs.ref }}
         run: |
           set -euo pipefail
           find . -mindepth 1 -delete
-          git clone --depth 1 --branch "${{ inputs.ref }}" \
+          # inputs.ref comes through fully-qualified (refs/heads/main), not "main"
+          BRANCH="${DEPLOY_REF#refs/heads/}"
+          git clone --depth 1 --branch "$BRANCH" \
             "http://${DEPLOY_TOKEN}@172.24.0.2:3000/BPPP/smb-online.git" .
           git remote set-url origin http://172.24.0.2:3000/BPPP/smb-online.git