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/models/nuzlocke_run.py

@@ -13,7 +13,9 @@ class NuzlockeRun(Base):
     id: Mapped[int] = mapped_column(primary_key=True)
     game_id: Mapped[int] = mapped_column(ForeignKey("games.id"), index=True)
     name: Mapped[str] = mapped_column(String(100))
-    status: Mapped[str] = mapped_column(String(20), index=True)  # active, completed, failed
+    status: Mapped[str] = mapped_column(
+        String(20), index=True
+    )  # active, completed, failed
     rules: Mapped[dict] = mapped_column(JSONB, default=dict)
     started_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now()
@@ -26,4 +28,6 @@ class NuzlockeRun(Base):
     boss_results: Mapped[list["BossResult"]] = relationship(back_populates="run")
 
     def __repr__(self) -> str:
-        return f"<NuzlockeRun(id={self.id}, name='{self.name}', status='{self.status}')>"
+        return (
+            f"<NuzlockeRun(id={self.id}, name='{self.name}', status='{self.status}')>"
+        )