Fix linting errors across backend and frontend

Backend: auto-fix and format all ruff issues, manually fix B904/B023/
SIM117/B007/E741/F841 errors, suppress B008 (FastAPI Depends) and F821
(SQLAlchemy forward refs) in config. Frontend: allow constant exports,
disable React compiler-specific rules (set-state-in-effect,
preserve-manual-memoization).

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

backend/src/app/api/export.py

@@ -20,9 +20,7 @@ router = APIRouter()
 @router.get("/games")
 async def export_games(session: AsyncSession = Depends(get_session)):
     """Export all games in seed JSON format."""
-    result = await session.execute(
-        select(Game).order_by(Game.name)
-    )
+    result = await session.execute(select(Game).order_by(Game.name))
     games = result.scalars().all()
     return [
         {
@@ -154,7 +152,11 @@ async def export_game_bosses(
                         "pokemon_name": bp.pokemon.name,
                         "level": bp.level,
                         "order": bp.order,
-                        **({"condition_label": bp.condition_label} if bp.condition_label else {}),
+                        **(
+                            {"condition_label": bp.condition_label}
+                            if bp.condition_label
+                            else {}
+                        ),
                     }
                     for bp in sorted(b.pokemon, key=lambda p: p.order)
                 ],
@@ -167,9 +169,7 @@ async def export_game_bosses(
 @router.get("/pokemon")
 async def export_pokemon(session: AsyncSession = Depends(get_session)):
     """Export all pokemon in seed JSON format."""
-    result = await session.execute(
-        select(Pokemon).order_by(Pokemon.pokeapi_id)
-    )
+    result = await session.execute(select(Pokemon).order_by(Pokemon.pokeapi_id))
     pokemon_list = result.scalars().all()
     return [
         {