diff --git a/.gitea/workflows/release-offline.yml b/.gitea/workflows/release-offline.yml
index bf023786..08b90f0b 100644
--- a/.gitea/workflows/release-offline.yml
+++ b/.gitea/workflows/release-offline.yml
@@ -56,9 +56,32 @@ jobs:
         run: |
           set -euo pipefail
 
+          toolchain_root="${MAIBOT_NODE_TOOLCHAIN_ROOT:-/srv/gitea-runner-maibot/toolchains/node}"
+          if [ -d "$toolchain_root/bin" ]; then
+            export PATH="$toolchain_root/bin:$PATH"
+          fi
+
           cd "$MAIBOT_WORKTREE/dashboard"
-          npm ci
-          npm run build
+
+          if command -v npm >/dev/null 2>&1; then
+            npm_cache_dir="${MAIBOT_NPM_CACHE_DIR:-/srv/gitea-runner-maibot/npm-cache}"
+            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 $MAIBOT_REPO_SHA." >&2
+              exit 127
+            fi
+
+            rm -rf dist
+            mkdir -p dist
+            tar -xzf "$dist_bundle" -C "$MAIBOT_WORKTREE/dashboard"
+          fi
 
           test -f dist/index.html