Fix doubled encounters in encounter modals by filtering on gameId

EncounterModal and ShinyEncounterModal were calling useRoutePokemon
without a gameId, returning encounters for all games in the version
group. Now both receive and pass the run's gameId to scope results
to the current game only.

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

frontend/src/pages/RunEncounters.tsx

@@ -218,7 +218,7 @@ function RouteGroup({
                 <img
                   src={groupEncounter.pokemon.spriteUrl}
                   alt={groupEncounter.pokemon.name}
-                  className="w-5 h-5"
+                  className="w-10 h-10"
                 />
               )}
               <span className="text-xs text-gray-500 dark:text-gray-400 capitalize">
@@ -972,7 +972,7 @@ export function RunEncounters() {
                         <img
                           src={encounter.pokemon.spriteUrl}
                           alt={encounter.pokemon.name}
-                          className="w-5 h-5"
+                          className="w-10 h-10"
                         />
                       )}
                       <span className="text-xs text-gray-500 dark:text-gray-400 capitalize">
@@ -1116,6 +1116,7 @@ export function RunEncounters() {
       {selectedRoute && (
         <EncounterModal
           route={selectedRoute}
+          gameId={run!.gameId}
           existing={editingEncounter ?? undefined}
           dupedPokemonIds={dupedPokemonIds}
           onSubmit={handleCreate}
@@ -1132,6 +1133,7 @@ export function RunEncounters() {
       {showShinyModal && routes && (
         <ShinyEncounterModal
           routes={routes}
+          gameId={run!.gameId}
           onSubmit={handleCreate}
           onClose={() => setShowShinyModal(false)}
           isPending={createEncounter.isPending}