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>

backend/src/app/seeds/inject_test_data.py

@@ -125,7 +125,7 @@ RUN_DEFS = [
         "name": "Unova Adventure",
         "status": "active",
         "progress": 0.35,
-        "rules": {},
+        "rules": {"randomizer": True},
         "started_days_ago": 5,
         "ended_days_ago": None,
     },
@@ -148,6 +148,9 @@ DEFAULT_RULES = {
     "levelCaps": False,
     "hardcoreMode": False,
     "setModeOnly": False,
+    "egglocke": False,
+    "wonderlocke": False,
+    "randomizer": False,
 }