fix(release): fallback to prebuilt dashboard bundle in offline workflow

.gitea/workflows/release-offline.yml

@@ -57,6 +57,9 @@ jobs:
           set -euo pipefail
 
           toolchain_root="${MAIBOT_NODE_TOOLCHAIN_ROOT:-/srv/gitea-runner-maibot/toolchains/node}"
+          dist_bundle_root="${MAIBOT_PREBUILT_DASHBOARD_ROOT:-/srv/gitea-runner-maibot/prebuilt-dashboard}"
+          dist_bundle="${dist_bundle_root}/${MAIBOT_REPO_SHA}.tar.gz"
+
           if [ -d "$toolchain_root/bin" ]; then
             export PATH="$toolchain_root/bin:$PATH"
           fi
@@ -68,21 +71,21 @@ jobs:
             mkdir -p "$npm_cache_dir"
             npm ci --cache "$npm_cache_dir"
             npm run build
-          else
-            dist_bundle_root="${MAIBOT_PREBUILT_DASHBOARD_ROOT:-/srv/gitea-runner-maibot/prebuilt-dashboard}"
-            dist_bundle="${dist_bundle_root}/${MAIBOT_REPO_SHA}.tar.gz"
-
-            if [ ! -f "$dist_bundle" ]; then
-              echo "npm is not available and no prebuilt dashboard bundle was found: $dist_bundle" >&2
-              echo "Either install an offline Node.js toolchain under $toolchain_root or upload a prebuilt dist bundle for commit $MAIBOT_REPO_SHA." >&2
-              exit 127
-            fi
+          fi
 
+          if [ ! -f dist/index.html ] && [ -f "$dist_bundle" ]; then
+            echo "Using prebuilt dashboard bundle: $dist_bundle"
             rm -rf dist
             mkdir -p dist
             tar -xzf "$dist_bundle" -C "$MAIBOT_WORKTREE/dashboard"
           fi
 
+          if [ ! -f dist/index.html ]; then
+            echo "dashboard build output not found: $MAIBOT_WORKTREE/dashboard/dist/index.html" >&2
+            echo "Provide a working offline npm toolchain or upload a prebuilt dashboard bundle to $dist_bundle." >&2
+            exit 127
+          fi
+
           test -f dist/index.html
 
       - name: Stage release directory