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>

frontend/src/components/index.ts

@@ -6,6 +6,8 @@ export { GameGrid } from './GameGrid'
 export { Layout } from './Layout'
 export { PokemonCard } from './PokemonCard'
 export { RuleBadges } from './RuleBadges'
+export { ShinyBox } from './ShinyBox'
+export { ShinyEncounterModal } from './ShinyEncounterModal'
 export { StatusChangeModal } from './StatusChangeModal'
 export { RuleToggle } from './RuleToggle'
 export { RulesConfiguration } from './RulesConfiguration'