fix(ci): resolve dispatch fallback tag from stable releases

Author: zouyonghe

.github/workflows/release.yml

@@ -124,9 +124,10 @@ jobs:
           elif [ -n "$dispatch_tag" ]; then
             tag="$dispatch_tag"
           else
-            if ! tag="$(git describe --tags --abbrev=0 2>/tmp/git_describe_error.log)"; then
-              echo "Failed to resolve tag via git describe. Ensure repository history and tags are available." >&2
-              cat /tmp/git_describe_error.log >&2 || true
+            # workflow_dispatch without explicit tag should default to latest stable v-tag.
+            tag="$(git tag --list 'v*' --sort=-version:refname | grep -E '^v[0-9]+(\.[0-9]+)*$' | head -n1)"
+            if [ -z "$tag" ]; then
+              echo "Failed to resolve latest stable v-tag." >&2
               exit 1
             fi
           fi