Add type restriction rule (monolocke)

Adds allowedTypes: string[] to NuzlockeRules. When set, the encounter
selector hides non-matching Pokemon and the routes endpoint filters out
routes with no matching encounters, so only eligible locations appear.

Type picker UI in RulesConfiguration; active restriction shown in
RuleBadges. Backend accepts allowed_types query param and joins through
RouteEncounter.pokemon to filter by type.

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

frontend/src/pages/RunEncounters.tsx

@@ -470,7 +470,11 @@ export function RunEncounters() {
   const { data: run, isLoading, error } = useRun(runIdNum)
   const advanceLeg = useAdvanceLeg()
   const [showTransferModal, setShowTransferModal] = useState(false)
-  const { data: routes, isLoading: loadingRoutes } = useGameRoutes(run?.gameId ?? null)
+  const rulesAllowedTypes = run?.rules?.allowedTypes ?? []
+  const { data: routes, isLoading: loadingRoutes } = useGameRoutes(
+    run?.gameId ?? null,
+    rulesAllowedTypes.length ? rulesAllowedTypes : undefined
+  )
   const createEncounter = useCreateEncounter(runIdNum)
   const updateEncounter = useUpdateEncounter(runIdNum)
   const bulkRandomize = useBulkRandomize(runIdNum)
@@ -1544,6 +1548,7 @@ export function RunEncounters() {
           isPending={createEncounter.isPending || updateEncounter.isPending}
           useAllPokemon={useAllPokemon}
           staticClause={run?.rules?.staticClause ?? true}
+          allowedTypes={rulesAllowedTypes.length ? rulesAllowedTypes : undefined}
         />
       )}