Phase 28 moved the battle fetch off the REST passthrough onto the
signed envelope, so the Playwright spec's `page.route(...)` against
the old REST path no longer intercepts anything and the viewer
times out waiting for data. Update the spec to:
- Build a FlatBuffers `BattleReport` payload in
`fixtures/battle-fbs.ts` (mirrors `report-fbs.ts`'s pattern).
- Add a `user.games.battle` case to the ExecuteCommand mock that
decodes the FBS `GameBattleRequest`, returns the encoded report
when the battle_id matches the seeded one, and surfaces a
canonical `not_found` resultCode otherwise.
- Drop the obsolete REST route stubs.
- Drive the negative-path test with a real UUID that does not match
the seeded one, so the gateway-side switch is the source of the
404 (the old `missing-uuid` literal was no longer a valid wire
shape for the UUID decoder).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ilia Denisov