Enforce Dupes Clause and Shiny Clause rules

Dupes Clause greys out Pokemon in the encounter modal whose evolution
family has already been caught, preventing duplicate selections. Shiny
Clause adds a dedicated Shiny Box and lets shiny catches bypass the
one-per-route lock via a new is_shiny column on encounters and a
/pokemon/families endpoint that computes evolution family groups.

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

.beans/nuzlocke-tracker-b9oj--implement-dupes-clause-shiny-clause-enforcement.md

@@ -0,0 +1,24 @@
+---
+# nuzlocke-tracker-b9oj
+title: Implement Dupes Clause & Shiny Clause Enforcement
+status: completed
+type: feature
+priority: normal
+created_at: 2026-02-07T20:03:12Z
+updated_at: 2026-02-07T20:07:50Z
+---
+
+Add enforcement for duplicatesClause and shinyClause rules:
+- Dupes Clause: Grey out Pokemon in encounter modal whose evolution family is already caught
+- Shiny Clause: Dedicated Shiny Box for bonus shiny catches that bypass route locks
+
+## Checklist
+- [x] Migration: Add is_shiny column to encounters table
+- [x] Backend model + schema: Add is_shiny field
+- [x] Backend: Shiny route-lock bypass in create_encounter
+- [x] Backend: Evolution families endpoint (GET /pokemon/families)
+- [x] Frontend types + API: Add isShiny fields and fetchPokemonFamilies
+- [x] Frontend: Dupes Clause greying in EncounterModal
+- [x] Frontend: ShinyEncounterModal + ShinyBox components
+- [x] Frontend: RunEncounters orchestration (split encounters, duped IDs, shiny box)
+- [x] TypeScript type check passes