Biome flagged TypeScript syntax in the .mjs stub module. Remove type
annotations and prefix the unused run() store parameter with underscore
to satisfy lint rules.
Replace platform: 'node' (incompatible with iife browser bundle) with
explicit aliases for node:async_hooks, node:crypto, node:fs/promises,
node:path pointing at e2e/ui/node-stubs.mjs. Provides shape-compatible
exports so esbuild can bundle the UI fixture without failing on Node
built-ins. Increase webServer timeout to 120s for reliable startup.
openhands