Add HoF team selection and genlocke retirement integration beans

The current retireHoF logic retires all alive Pokemon instead of just
the HoF team. Add beans to track the fix: a general HoF team selection
feature for all runs, and a follow-up task to integrate it into genlocke
retirement logic.

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

.beans/nuzlocke-tracker-xbxv--hall-of-fame-team-selection.md

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+---
+# nuzlocke-tracker-xbxv
+title: Hall of Fame team selection
+status: todo
+type: feature
+priority: normal
+created_at: 2026-02-09T09:14:44Z
+updated_at: 2026-02-09T09:15:08Z
+blocking:
+    - nuzlocke-tracker-25mh
+    - nuzlocke-tracker-h3fw
+---
+
+When a nuzlocke run is completed (status → completed), prompt the player to select which Pokemon were in their Hall of Fame team — the party of up to 6 that beat the Elite Four and Champion.
+
+This is a general nuzlocke feature (not genlocke-specific) and provides value on its own:
+- Interesting stats: which Pokemon enter the HoF most often across runs
+- Run summary: display the HoF team prominently on the completed run page
+- Foundation for genlocke retireHoF logic (only retire HoF team, not all alive Pokemon)
+
+## Behavior
+- After marking a run as completed, show a modal/step asking the player to pick their HoF team from all alive Pokemon
+- Max 6 Pokemon can be selected
+- Store the selection as a list of encounter IDs on the run (or a join table)
+- The HoF team should be displayed prominently on the completed run page (e.g. in the victory banner)
+- Selection is optional — if skipped, all alive Pokemon are assumed to be in the HoF (backwards-compatible)
+
+## Backend
+- Add `hof_team` JSONB column (array of encounter IDs) to `nuzlocke_runs`, or a `hof_encounters` join table
+- New endpoint or extend `PATCH /runs/{id}` to accept HoF team selection
+- Include HoF team data in `GET /runs/{id}` response
+
+## Frontend
+- After the EndRunModal confirms "completed", show a HoF team selection step
+- Display alive Pokemon as selectable cards (max 6)
+- Show the selected HoF team in the victory banner on the completed run page
+- Allow editing the HoF team after the fact (in case the player forgot or made a mistake)
+
+## Checklist
+- [ ] Add `hof_encounter_ids` JSONB column to `nuzlocke_runs` (nullable array of ints)
+- [ ] Migration for the new column
+- [ ] Update `RunResponse` / `RunDetailResponse` schemas to include `hofEncounterIds`
+- [ ] Extend `PATCH /runs/{id}` to accept `hofEncounterIds` (validate they belong to the run and are alive)
+- [ ] Build HoF team selection modal (shown after completing a run)
+- [ ] Display HoF team in the victory banner on completed run pages
+- [ ] Allow editing HoF team selection on completed runs