Function error

dashboard/build.shared.mjs:170–187

(err, _req, res)

          // upgrade/websocket failures, so handle both shapes.
          on: {
            error(err, _req, res) {
              console.error(
                `tracedecay dev /api proxy error -> ${apiTarget}: ${err.message}`,
              );
              if (res && typeof res.writeHead === "function") {
                if (!res.headersSent) {
                  res.writeHead(502, { "Content-Type": "application/json" });
                  res.end(
                    JSON.stringify({
                      error: `dev proxy failed to reach ${apiTarget}`,
                      detail: err.message,
                    }),
                  );
                }
              } else if (res && typeof res.destroy === "function") {
                res.destroy(err);
              }
            },
          },
        },
      },