Feature set 178.

[jackfperryjr]

Adds Game.IsMainSeries — a hand-set flag separating the numbered entries and their direct sequels from spin-offs.

Square Enix has never published a spin-off list, so this is a curation decision rather than anything derivable from a title, which is why it is a flag and not a computed property. The line drawn here puts the direct sequels on the main-series side: FFX-2, FFXIII-2, The After Years and the Compilation of FFVII are set in a numbered entry's world and share its cast, so splitting them off would separate Yuna from Yuna.

Every game currently in the table is a numbered entry or a direct sequel, so the migration backfills the whole catalogue to true. The column default stays false — from here on a new row is far more likely to be a spin-off than another numbered entry, and the dashboard's blank-row builder already defaults bools to false, so the create form lands on the right answer without a special case.

Named IsMainSeries rather than IsSpinOff to match Character.IsPlayable, and because it is the framing where both defaults fall the right way.

• IsMainSeries on Game, plus the migration and its backfill
• Round-trips through the dashboard browse/create/update endpoints
• A main/spin-off badge column and a checkbox in the games editor
• Additive field on both public game responses (GET /games, GET /games/{id})

Nothing filters on it yet, deliberately — the puzzle games still draw from the whole catalogue.

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