Add bean for gathering generation metadata

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.beans/nuzlocke-tracker-glh8--gather-generation-metadata-games-regions.md

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+---
+# nuzlocke-tracker-glh8
+title: Gather generation metadata (games, regions)
+status: todo
+type: task
+created_at: 2026-02-08T19:20:49Z
+updated_at: 2026-02-08T19:20:49Z
+parent: nuzlocke-tracker-25mh
+---
+
+Collect and store metadata about each Pokemon generation to support genlocke features. This data is needed so the app can present generation-aware options when setting up a genlocke (e.g. "pick one game per generation").
+
+## Data to gather per generation
+- **Generation number** (1–9)
+- **Main region** (e.g. Gen 1 → Kanto, Gen 2 → Johto, etc.)
+- **Games in the generation** — including remakes and enhanced versions:
+  - Original titles (e.g. Red, Blue, Yellow)
+  - Remakes that belong to the generation's region (e.g. FireRed/LeafGreen are Gen 1 region but Gen 3 era)
+- Consider whether remakes should be listed under their original generation (by region) or their release generation (by engine/dex) — genlocke players typically organize by region
+
+## Notes
+- This could be stored as seed data (JSON) or as a database table
+- The existing Game model already has `generation` and `region` fields, so some of this data may already be derivable from existing games in the DB
+- However, a dedicated generations reference would be useful for UI purposes (showing all generations even if not all games are seeded yet)
+- Check if `backend/src/app/seeds/data/generations.json` already exists or if this needs to be created from scratch