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>

backend/src/app/api/games.py

@@ -1,7 +1,7 @@
 import json
 from pathlib import Path
 
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy import delete, select, update
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
@@ -131,6 +131,7 @@ async def get_game(game_id: int, session: AsyncSession = Depends(get_session)):
 async def list_game_routes(
     game_id: int,
     flat: bool = False,
+    allowed_types: list[str] | None = Query(None),
     session: AsyncSession = Depends(get_session),
 ):
     """
@@ -138,13 +139,18 @@ async def list_game_routes(
 
     By default, returns a hierarchical structure with top-level routes containing
     nested children. Use `flat=True` to get a flat list of all routes.
+
+    When `allowed_types` is provided, routes with no encounters matching any of
+    those Pokemon types are excluded.
     """
     vg_id = await _get_version_group_id(session, game_id)
 
     result = await session.execute(
         select(Route)
         .where(Route.version_group_id == vg_id)
-        .options(selectinload(Route.route_encounters))
+        .options(
+            selectinload(Route.route_encounters).selectinload(RouteEncounter.pokemon)
+        )
         .order_by(Route.order)
     )
     all_routes = result.scalars().all()
@@ -170,7 +176,14 @@ async def list_game_routes(
 
     # Determine which routes have encounters for this game
     def has_encounters(route: Route) -> bool:
-        return any(re.game_id == game_id for re in route.route_encounters)
+        encounters = [re for re in route.route_encounters if re.game_id == game_id]
+        if not encounters:
+            return False
+        if allowed_types:
+            return any(
+                t in allowed_types for re in encounters for t in re.pokemon.types
+            )
+        return True
 
     # Collect IDs of parent routes that have at least one child with encounters
     parents_with_children = set()

backend/src/app/seeds/inject_test_data.py

@@ -154,6 +154,7 @@ DEFAULT_RULES = {
     "egglocke": False,
     "wonderlocke": False,
     "randomizer": False,
+    "allowedTypes": [],
 }