The Cartarch Chronicle.

The app's game system was built around a live-tracking lifecycle: create a lobby, play through the life-counter UI, then finalize with placements. There was no way to record a game that already happened without starting and immediately ending a fake live session. The manual log form creates a Game that is born finalized, composing `create_game` and `end_game` in one request rather than duplicating their logic. The data is indistinguishable from a normally-tracked game once recorded, so all downstream analytics (deck win-rate, dashboard performance, game history) pick it up without modification. Opponent seats carry free-text deck names instead of FK references because the logger generally doesn't have their opponents' decks registered in the system, and requiring that would defeat the "minimal fields" intent. The `played_at` override is the one `create_game` signature change, added as a defaulted parameter so existing callers are untouched.