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/components/RulesConfiguration.tsx

@@ -20,6 +20,7 @@ export function RulesConfiguration({
     : RULE_DEFINITIONS
   const coreRules = visibleRules.filter((r) => r.category === 'core')
   const playstyleRules = visibleRules.filter((r) => r.category === 'playstyle')
+  const variantRules = visibleRules.filter((r) => r.category === 'variant')
 
   const handleRuleChange = (key: keyof NuzlockeRules, value: boolean) => {
     onChange({ ...rules, [key]: value })
@@ -90,6 +91,26 @@ export function RulesConfiguration({
           ))}
         </div>
       </div>
+
+      <div className="bg-surface-1 rounded-lg shadow">
+        <div className="px-4 py-3 border-b border-border-default">
+          <h3 className="text-lg font-medium text-text-primary">Run Variant</h3>
+          <p className="text-sm text-text-tertiary">
+            Changes which Pokémon can appear — affects the encounter selector
+          </p>
+        </div>
+        <div className="px-4">
+          {variantRules.map((rule) => (
+            <RuleToggle
+              key={rule.key}
+              name={rule.name}
+              description={rule.description}
+              enabled={rules[rule.key]}
+              onChange={(value) => handleRuleChange(rule.key, value)}
+            />
+          ))}
+        </div>
+      </div>
     </div>
   )
 }