Add egglocke, wonderlocke, and randomizer variant rules

When any variant rule is enabled, the encounter modal switches from
the game's regional dex to an all-Pokemon search (same debounced
API pattern as EggEncounterModal). A new "Run Variant" section in
rules configuration groups these rules, and badges render in amber.

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

frontend/src/pages/RunEncounters.tsx

@@ -677,6 +677,7 @@ export function RunEncounters() {
   }
 
   const pinwheelClause = run.rules?.pinwheelClause ?? true
+  const useAllPokemon = !!(run.rules?.egglocke || run.rules?.wonderlocke || run.rules?.randomizer)
 
   // Count completed locations (zone-aware when pinwheel clause is on)
   let completedCount = 0
@@ -1411,6 +1412,7 @@ export function RunEncounters() {
             setEditingEncounter(null)
           }}
           isPending={createEncounter.isPending || updateEncounter.isPending}
+          useAllPokemon={useAllPokemon}
         />
       )}