try using gitea api

.gitea/actions/getTagSafeRef/action.yml

@@ -9,11 +9,40 @@ outputs:
 runs:
   using: 'composite'
   steps:
+    - name: Get PR branch info via Gitea API
+      if: github.event.issue.pull_request
+      id: pr-info
+      shell: bash
+      run: |
+        # Use Gitea's API endpoint
+        PR_URL="${{ github.event.issue.pull_request.url }}"
+
+        # Extract PR info using curl (Gitea API is similar to GitHub)
+        PR_INFO=$(curl -s -H "Authorization: token ${{ github.token }}" "$PR_URL")
+
+        # Extract branch name from JSON response
+        BRANCH_NAME=$(echo "$PR_INFO" | jq -r '.head.ref')
+
+        echo "pr_branch=$BRANCH_NAME" >> $GITHUB_OUTPUT
+        echo "Found PR branch: $BRANCH_NAME"
+
     - name: Create tag safe branch name
       id: get-branch
       shell: bash
       run: |
-        BRANCH_NAME="${{ github.ref }}"
+        if [[ "${{ github.event.issue.pull_request }}" != "" && "${{ github.event.issue.pull_request }}" != "null" ]]; then
+          # This is a PR comment - use the branch we got from API
+          BRANCH_NAME="${{ steps.pr-info.outputs.pr_branch }}"
+          echo "Using PR branch: $BRANCH_NAME"
+        elif [[ "${{ github.head_ref }}" != "" ]]; then
+          # This is a PR workflow
+          BRANCH_NAME="${{ github.head_ref }}"
+          echo "Using head ref: $BRANCH_NAME"
+        else
+          # This is a push to main/other branch
+          BRANCH_NAME="${{ github.ref_name }}"
+          echo "Using ref name: $BRANCH_NAME"
+        fi
 
         # Clean the branch name for Docker tag compatibility
         CLEAN_BRANCH=$(echo "$BRANCH_NAME" | sed 's/[^a-zA-Z0-9._-]/-/g' | tr '[:upper:]' '[:lower:]')