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/evolution.py

@@ -14,7 +14,9 @@ class Evolution(Base):
     min_level: Mapped[int | None] = mapped_column(SmallInteger)
     item: Mapped[str | None] = mapped_column(String(50))  # e.g. thunder-stone
     held_item: Mapped[str | None] = mapped_column(String(50))
-    condition: Mapped[str | None] = mapped_column(String(200))  # catch-all for other conditions
+    condition: Mapped[str | None] = mapped_column(
+        String(200)
+    )  # catch-all for other conditions
     region: Mapped[str | None] = mapped_column(String(30))
 
     from_pokemon: Mapped["Pokemon"] = relationship(foreign_keys=[from_pokemon_id])