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>

.beans/nuzlocke-tracker-ve9f--fix-linting-errors-across-backend-and-frontend.md

@@ -0,0 +1,36 @@
+---
+# nuzlocke-tracker-ve9f
+title: Fix linting errors across backend and frontend
+status: in-progress
+type: task
+priority: normal
+created_at: 2026-02-10T11:21:24Z
+updated_at: 2026-02-10T11:22:42Z
+---
+
+The CI pipeline is now running but linting fails on both backend and frontend. Clean up all lint errors so CI passes green.
+
+## Backend (ruff)
+
+- **236 errors** found, **126 auto-fixable** with `ruff check --fix`
+- **44 files** need reformatting with `ruff format`
+- Most issues are in alembic migrations (auto-generated boilerplate: `Union` → `X | Y`, import sorting, unused imports) and across API/model/seed files (formatting, datetime.UTC, loop variable issues)
+- Fix approach:
+  1. Run `ruff check --fix backend/` to auto-fix 126 issues
+  2. Run `ruff format backend/` to reformat 44 files
+  3. Manually fix remaining ~110 issues (B023 loop variable binding, SIM117, etc.)
+
+## Frontend (eslint + tsc)
+
+- Run `cd frontend && npm ci && npm run lint` to see errors
+- Run `npx tsc -b` for type checking
+- Fix any reported issues
+
+## Checklist
+
+- [x] Auto-fix backend ruff lint errors (`ruff check --fix backend/`)
+- [x] Auto-format backend files (`ruff format backend/`)
+- [x] Manually fix remaining backend lint errors
+- [x] Fix frontend eslint errors
+- [x] Fix frontend TypeScript errors (if any)
+- [ ] Verify CI passes green on develop

backend/pyproject.toml

@@ -47,8 +47,12 @@ select = [
 ]
 ignore = [
     "E501",   # line too long (handled by formatter)
+    "B008",   # Depends() in defaults — standard FastAPI pattern
 ]
 
+[tool.ruff.lint.per-file-ignores]
+"src/app/models/*.py" = ["F821"]  # forward refs in SQLAlchemy relationships
+
 [tool.ruff.lint.isort]
 known-first-party = ["app"]
 

backend/src/app/alembic/env.py

@@ -1,16 +1,14 @@
 import asyncio
 from logging.config import fileConfig
 
+from alembic import context
 from sqlalchemy import pool
 from sqlalchemy.ext.asyncio import async_engine_from_config
 
-from alembic import context
-
-from app.core.config import settings
-from app.core.database import Base, _get_async_url
-
 # Import all models so Base.metadata is populated
 import app.models  # noqa: F401
+from app.core.config import settings
+from app.core.database import Base, _get_async_url
 
 config = context.config
 

backend/src/app/alembic/versions/03e5f186a9d5_initial_schema.py

@@ -6,18 +6,17 @@ Create Date: 2026-02-05 13:27:47.649534
 
 """
 
-from typing import Sequence, Union
+from collections.abc import Sequence
 
 import sqlalchemy as sa
-from sqlalchemy.dialects import postgresql
-
 from alembic import op
+from sqlalchemy.dialects import postgresql
 
 # revision identifiers, used by Alembic.
 revision: str = "03e5f186a9d5"
-down_revision: Union[str, Sequence[str], None] = None
+down_revision: str | Sequence[str] | None = None
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
@@ -36,9 +35,7 @@ def upgrade() -> None:
         "routes",
         sa.Column("id", sa.Integer(), primary_key=True),
         sa.Column("name", sa.String(100), nullable=False),
-        sa.Column(
+        sa.Column("game_id", sa.Integer(), sa.ForeignKey("games.id"), nullable=False),
-            "game_id", sa.Integer(), sa.ForeignKey("games.id"), nullable=False
-        ),
         sa.Column("order", sa.SmallInteger(), nullable=False),
     )
     op.create_index("ix_routes_game_id", "routes", ["game_id"])
@@ -46,22 +43,16 @@ def upgrade() -> None:
     op.create_table(
         "pokemon",
         sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column(
+        sa.Column("national_dex", sa.SmallInteger(), nullable=False, unique=True),
-            "national_dex", sa.SmallInteger(), nullable=False, unique=True
-        ),
         sa.Column("name", sa.String(50), nullable=False),
-        sa.Column(
+        sa.Column("types", postgresql.ARRAY(sa.String(20)), nullable=False),
-            "types", postgresql.ARRAY(sa.String(20)), nullable=False
-        ),
         sa.Column("sprite_url", sa.String(500), nullable=True),
     )
 
     op.create_table(
         "route_encounters",
         sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column(
+        sa.Column("route_id", sa.Integer(), sa.ForeignKey("routes.id"), nullable=False),
-            "route_id", sa.Integer(), sa.ForeignKey("routes.id"), nullable=False
-        ),
         sa.Column(
             "pokemon_id",
             sa.Integer(),
@@ -77,9 +68,7 @@ def upgrade() -> None:
             name="uq_route_pokemon_method",
         ),
     )
-    op.create_index(
+    op.create_index("ix_route_encounters_route_id", "route_encounters", ["route_id"])
-        "ix_route_encounters_route_id", "route_encounters", ["route_id"]
-    )
     op.create_index(
         "ix_route_encounters_pokemon_id", "route_encounters", ["pokemon_id"]
     )
@@ -87,30 +76,20 @@ def upgrade() -> None:
     op.create_table(
         "nuzlocke_runs",
         sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column(
+        sa.Column("game_id", sa.Integer(), sa.ForeignKey("games.id"), nullable=False),
-            "game_id", sa.Integer(), sa.ForeignKey("games.id"), nullable=False
-        ),
         sa.Column("name", sa.String(100), nullable=False),
         sa.Column("status", sa.String(20), nullable=False),
-        sa.Column(
+        sa.Column("rules", postgresql.JSONB(), nullable=False, server_default="{}"),
-            "rules", postgresql.JSONB(), nullable=False, server_default="{}"
-        ),
         sa.Column(
             "started_at",
             sa.DateTime(timezone=True),
             nullable=False,
             server_default=sa.func.now(),
         ),
-        sa.Column(
+        sa.Column("completed_at", sa.DateTime(timezone=True), nullable=True),
-            "completed_at", sa.DateTime(timezone=True), nullable=True
-        ),
-    )
-    op.create_index(
-        "ix_nuzlocke_runs_game_id", "nuzlocke_runs", ["game_id"]
-    )
-    op.create_index(
-        "ix_nuzlocke_runs_status", "nuzlocke_runs", ["status"]
     )
+    op.create_index("ix_nuzlocke_runs_game_id", "nuzlocke_runs", ["game_id"])
+    op.create_index("ix_nuzlocke_runs_status", "nuzlocke_runs", ["status"])
 
     op.create_table(
         "encounters",
@@ -121,9 +100,7 @@ def upgrade() -> None:
             sa.ForeignKey("nuzlocke_runs.id"),
             nullable=False,
         ),
-        sa.Column(
+        sa.Column("route_id", sa.Integer(), sa.ForeignKey("routes.id"), nullable=False),
-            "route_id", sa.Integer(), sa.ForeignKey("routes.id"), nullable=False
-        ),
         sa.Column(
             "pokemon_id",
             sa.Integer(),

backend/src/app/alembic/versions/694df688fb02_add_unique_constraint_routes_game_name.py

@@ -5,28 +5,27 @@ Revises: 03e5f186a9d5
 Create Date: 2026-02-05 13:01:30.631978
 
 """
-from typing import Sequence, Union
+
+from collections.abc import Sequence
 
 from alembic import op
-import sqlalchemy as sa
-
 
 # revision identifiers, used by Alembic.
-revision: str = '694df688fb02'
+revision: str = "694df688fb02"
-down_revision: Union[str, Sequence[str], None] = '03e5f186a9d5'
+down_revision: str | Sequence[str] | None = "03e5f186a9d5"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     """Upgrade schema."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.create_unique_constraint('uq_routes_game_name', 'routes', ['game_id', 'name'])
+    op.create_unique_constraint("uq_routes_game_name", "routes", ["game_id", "name"])
     # ### end Alembic commands ###
 
 
 def downgrade() -> None:
     """Downgrade schema."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_constraint('uq_routes_game_name', 'routes', type_='unique')
+    op.drop_constraint("uq_routes_game_name", "routes", type_="unique")
     # ### end Alembic commands ###

backend/src/app/alembic/versions/9afcbafe9888_add_level_range_to_route_encounters.py

@@ -5,30 +5,36 @@ Revises: 694df688fb02
 Create Date: 2026-02-05 13:32:35.559499
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = '9afcbafe9888'
+revision: str = "9afcbafe9888"
-down_revision: Union[str, Sequence[str], None] = '694df688fb02'
+down_revision: str | Sequence[str] | None = "694df688fb02"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     """Upgrade schema."""
-    op.add_column('route_encounters', sa.Column('min_level', sa.SmallInteger(), nullable=False, server_default='0'))
+    op.add_column(
-    op.add_column('route_encounters', sa.Column('max_level', sa.SmallInteger(), nullable=False, server_default='0'))
+        "route_encounters",
-    op.alter_column('route_encounters', 'min_level', server_default=None)
+        sa.Column("min_level", sa.SmallInteger(), nullable=False, server_default="0"),
-    op.alter_column('route_encounters', 'max_level', server_default=None)
+    )
+    op.add_column(
+        "route_encounters",
+        sa.Column("max_level", sa.SmallInteger(), nullable=False, server_default="0"),
+    )
+    op.alter_column("route_encounters", "min_level", server_default=None)
+    op.alter_column("route_encounters", "max_level", server_default=None)
 
 
 def downgrade() -> None:
     """Downgrade schema."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_column('route_encounters', 'max_level')
+    op.drop_column("route_encounters", "max_level")
-    op.drop_column('route_encounters', 'min_level')
+    op.drop_column("route_encounters", "min_level")
     # ### end Alembic commands ###

backend/src/app/alembic/versions/a1b2c3d4e5f6_add_death_cause_to_encounters.py

@@ -5,22 +5,22 @@ Revises: 9afcbafe9888
 Create Date: 2026-02-05 17:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'a1b2c3d4e5f6'
+revision: str = "a1b2c3d4e5f6"
-down_revision: Union[str, Sequence[str], None] = '9afcbafe9888'
+down_revision: str | Sequence[str] | None = "9afcbafe9888"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
-    op.add_column('encounters', sa.Column('death_cause', sa.String(100), nullable=True))
+    op.add_column("encounters", sa.Column("death_cause", sa.String(100), nullable=True))
 
 
 def downgrade() -> None:
-    op.drop_column('encounters', 'death_cause')
+    op.drop_column("encounters", "death_cause")

backend/src/app/alembic/versions/a1b2c3d4e5f7_add_pinwheel_clause_support.py

@@ -5,25 +5,25 @@ Revises: f6a7b8c9d0e1
 Create Date: 2026-02-07 12:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'a1b2c3d4e5f7'
+revision: str = "a1b2c3d4e5f7"
-down_revision: Union[str, Sequence[str], None] = 'f6a7b8c9d0e1'
+down_revision: str | Sequence[str] | None = "f6a7b8c9d0e1"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'routes',
+        "routes",
-        sa.Column('pinwheel_zone', sa.SmallInteger(), nullable=True),
+        sa.Column("pinwheel_zone", sa.SmallInteger(), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('routes', 'pinwheel_zone')
+    op.drop_column("routes", "pinwheel_zone")

backend/src/app/alembic/versions/a1b2c3d4e5f8_add_category_to_games.py

@@ -5,25 +5,25 @@ Revises: f6a7b8c9d0e1
 Create Date: 2026-02-09 12:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'a1b2c3d4e5f8'
+revision: str = "a1b2c3d4e5f8"
-down_revision: Union[str, Sequence[str], None] = 'f6a7b8c9d0e1'
+down_revision: str | Sequence[str] | None = "f6a7b8c9d0e1"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'games',
+        "games",
-        sa.Column('category', sa.String(20), nullable=True),
+        sa.Column("category", sa.String(20), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('games', 'category')
+    op.drop_column("games", "category")

backend/src/app/alembic/versions/a6b7c8d9e0f1_add_specialty_type_to_boss_battles.py

@@ -5,22 +5,24 @@ Revises: f5a6b7c8d9e0
 Create Date: 2026-02-08 21:00:00.000000
 
 """
-from typing import Sequence, Union
+
+from collections.abc import Sequence
 
 import sqlalchemy as sa
 from alembic import op
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'a6b7c8d9e0f1'
+revision: str = "a6b7c8d9e0f1"
-down_revision: Union[str, Sequence[str], None] = 'f5a6b7c8d9e0'
+down_revision: str | Sequence[str] | None = "f5a6b7c8d9e0"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
-    op.add_column('boss_battles', sa.Column('specialty_type', sa.String(20), nullable=True))
+    op.add_column(
+        "boss_battles", sa.Column("specialty_type", sa.String(20), nullable=True)
+    )
 
 
 def downgrade() -> None:
-    op.drop_column('boss_battles', 'specialty_type')
+    op.drop_column("boss_battles", "specialty_type")

backend/src/app/alembic/versions/b1c2d3e4f5a6_add_is_shiny_to_encounters.py

@@ -5,25 +5,27 @@ Revises: a1b2c3d4e5f7
 Create Date: 2026-02-07 18:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'b1c2d3e4f5a6'
+revision: str = "b1c2d3e4f5a6"
-down_revision: Union[str, Sequence[str], None] = 'a1b2c3d4e5f7'
+down_revision: str | Sequence[str] | None = "a1b2c3d4e5f7"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'encounters',
+        "encounters",
-        sa.Column('is_shiny', sa.Boolean(), nullable=False, server_default=sa.text('false')),
+        sa.Column(
+            "is_shiny", sa.Boolean(), nullable=False, server_default=sa.text("false")
+        ),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('encounters', 'is_shiny')
+    op.drop_column("encounters", "is_shiny")

backend/src/app/alembic/versions/b2c3d4e5f6a7_add_evolutions_and_current_pokemon.py

@@ -5,38 +5,56 @@ Revises: a1b2c3d4e5f6
 Create Date: 2026-02-05 18:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'b2c3d4e5f6a7'
+revision: str = "b2c3d4e5f6a7"
-down_revision: Union[str, Sequence[str], None] = 'a1b2c3d4e5f6'
+down_revision: str | Sequence[str] | None = "a1b2c3d4e5f6"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.create_table(
-        'evolutions',
+        "evolutions",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('from_pokemon_id', sa.Integer(), sa.ForeignKey('pokemon.id'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('to_pokemon_id', sa.Integer(), sa.ForeignKey('pokemon.id'), nullable=False, index=True),
+            "from_pokemon_id",
-        sa.Column('trigger', sa.String(30), nullable=False),
+            sa.Integer(),
-        sa.Column('min_level', sa.SmallInteger(), nullable=True),
+            sa.ForeignKey("pokemon.id"),
-        sa.Column('item', sa.String(50), nullable=True),
+            nullable=False,
-        sa.Column('held_item', sa.String(50), nullable=True),
+            index=True,
-        sa.Column('condition', sa.String(200), nullable=True),
+        ),
+        sa.Column(
+            "to_pokemon_id",
+            sa.Integer(),
+            sa.ForeignKey("pokemon.id"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column("trigger", sa.String(30), nullable=False),
+        sa.Column("min_level", sa.SmallInteger(), nullable=True),
+        sa.Column("item", sa.String(50), nullable=True),
+        sa.Column("held_item", sa.String(50), nullable=True),
+        sa.Column("condition", sa.String(200), nullable=True),
     )
 
     op.add_column(
-        'encounters',
+        "encounters",
-        sa.Column('current_pokemon_id', sa.Integer(), sa.ForeignKey('pokemon.id'), nullable=True, index=True),
+        sa.Column(
+            "current_pokemon_id",
+            sa.Integer(),
+            sa.ForeignKey("pokemon.id"),
+            nullable=True,
+            index=True,
+        ),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('encounters', 'current_pokemon_id')
+    op.drop_column("encounters", "current_pokemon_id")
-    op.drop_table('evolutions')
+    op.drop_table("evolutions")

backend/src/app/alembic/versions/b2c3d4e5f6a8_add_genlocke_tables.py

@@ -5,42 +5,65 @@ Revises: a1b2c3d4e5f8, b7c8d9e0f1a2
 Create Date: 2026-02-09 14:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
+from alembic import op
 from sqlalchemy.dialects.postgresql import JSONB
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'b2c3d4e5f6a8'
+revision: str = "b2c3d4e5f6a8"
-down_revision: Union[str, Sequence[str], None] = ('a1b2c3d4e5f8', 'b7c8d9e0f1a2')
+down_revision: str | Sequence[str] | None = ("a1b2c3d4e5f8", "b7c8d9e0f1a2")
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.create_table(
-        'genlockes',
+        "genlockes",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('name', sa.String(100), nullable=False),
+        sa.Column("name", sa.String(100), nullable=False),
-        sa.Column('status', sa.String(20), nullable=False, index=True),
+        sa.Column("status", sa.String(20), nullable=False, index=True),
-        sa.Column('genlocke_rules', JSONB(), nullable=False, server_default='{}'),
+        sa.Column("genlocke_rules", JSONB(), nullable=False, server_default="{}"),
-        sa.Column('nuzlocke_rules', JSONB(), nullable=False, server_default='{}'),
+        sa.Column("nuzlocke_rules", JSONB(), nullable=False, server_default="{}"),
-        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
     )
 
     op.create_table(
-        'genlocke_legs',
+        "genlocke_legs",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('genlocke_id', sa.Integer(), sa.ForeignKey('genlockes.id', ondelete='CASCADE'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('game_id', sa.Integer(), sa.ForeignKey('games.id'), nullable=False, index=True),
+            "genlocke_id",
-        sa.Column('run_id', sa.Integer(), sa.ForeignKey('nuzlocke_runs.id'), nullable=True, index=True),
+            sa.Integer(),
-        sa.Column('leg_order', sa.SmallInteger(), nullable=False),
+            sa.ForeignKey("genlockes.id", ondelete="CASCADE"),
-        sa.UniqueConstraint('genlocke_id', 'leg_order', name='uq_genlocke_legs_order'),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column(
+            "game_id",
+            sa.Integer(),
+            sa.ForeignKey("games.id"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column(
+            "run_id",
+            sa.Integer(),
+            sa.ForeignKey("nuzlocke_runs.id"),
+            nullable=True,
+            index=True,
+        ),
+        sa.Column("leg_order", sa.SmallInteger(), nullable=False),
+        sa.UniqueConstraint("genlocke_id", "leg_order", name="uq_genlocke_legs_order"),
     )
 
 
 def downgrade() -> None:
-    op.drop_table('genlocke_legs')
+    op.drop_table("genlocke_legs")
-    op.drop_table('genlockes')
+    op.drop_table("genlockes")

backend/src/app/alembic/versions/b7c8d9e0f1a2_add_condition_label_to_boss_pokemon.py

@@ -5,22 +5,24 @@ Revises: a6b7c8d9e0f1
 Create Date: 2026-02-08 22:00:00.000000
 
 """
-from typing import Sequence, Union
+
+from collections.abc import Sequence
 
 import sqlalchemy as sa
 from alembic import op
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'b7c8d9e0f1a2'
+revision: str = "b7c8d9e0f1a2"
-down_revision: Union[str, Sequence[str], None] = 'a6b7c8d9e0f1'
+down_revision: str | Sequence[str] | None = "a6b7c8d9e0f1"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
-    op.add_column('boss_pokemon', sa.Column('condition_label', sa.String(100), nullable=True))
+    op.add_column(
+        "boss_pokemon", sa.Column("condition_label", sa.String(100), nullable=True)
+    )
 
 
 def downgrade() -> None:
-    op.drop_column('boss_pokemon', 'condition_label')
+    op.drop_column("boss_pokemon", "condition_label")

backend/src/app/alembic/versions/c2d3e4f5a6b7_add_boss_battles.py

@@ -5,57 +5,95 @@ Revises: b1c2d3e4f5a6
 Create Date: 2026-02-08 12:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'c2d3e4f5a6b7'
+revision: str = "c2d3e4f5a6b7"
-down_revision: Union[str, Sequence[str], None] = 'b1c2d3e4f5a6'
+down_revision: str | Sequence[str] | None = "b1c2d3e4f5a6"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.create_table(
-        'boss_battles',
+        "boss_battles",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('game_id', sa.Integer(), sa.ForeignKey('games.id'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('name', sa.String(100), nullable=False),
+            "game_id",
-        sa.Column('boss_type', sa.String(20), nullable=False),
+            sa.Integer(),
-        sa.Column('badge_name', sa.String(100), nullable=True),
+            sa.ForeignKey("games.id"),
-        sa.Column('badge_image_url', sa.String(500), nullable=True),
+            nullable=False,
-        sa.Column('level_cap', sa.SmallInteger(), nullable=False),
+            index=True,
-        sa.Column('order', sa.SmallInteger(), nullable=False),
+        ),
-        sa.Column('after_route_id', sa.Integer(), sa.ForeignKey('routes.id'), nullable=True, index=True),
+        sa.Column("name", sa.String(100), nullable=False),
-        sa.Column('location', sa.String(200), nullable=False),
+        sa.Column("boss_type", sa.String(20), nullable=False),
-        sa.Column('sprite_url', sa.String(500), nullable=True),
+        sa.Column("badge_name", sa.String(100), nullable=True),
+        sa.Column("badge_image_url", sa.String(500), nullable=True),
+        sa.Column("level_cap", sa.SmallInteger(), nullable=False),
+        sa.Column("order", sa.SmallInteger(), nullable=False),
+        sa.Column(
+            "after_route_id",
+            sa.Integer(),
+            sa.ForeignKey("routes.id"),
+            nullable=True,
+            index=True,
+        ),
+        sa.Column("location", sa.String(200), nullable=False),
+        sa.Column("sprite_url", sa.String(500), nullable=True),
     )
 
     op.create_table(
-        'boss_pokemon',
+        "boss_pokemon",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('boss_battle_id', sa.Integer(), sa.ForeignKey('boss_battles.id', ondelete='CASCADE'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('pokemon_id', sa.Integer(), sa.ForeignKey('pokemon.id'), nullable=False, index=True),
+            "boss_battle_id",
-        sa.Column('level', sa.SmallInteger(), nullable=False),
+            sa.Integer(),
-        sa.Column('order', sa.SmallInteger(), nullable=False),
+            sa.ForeignKey("boss_battles.id", ondelete="CASCADE"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column(
+            "pokemon_id",
+            sa.Integer(),
+            sa.ForeignKey("pokemon.id"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column("level", sa.SmallInteger(), nullable=False),
+        sa.Column("order", sa.SmallInteger(), nullable=False),
     )
 
     op.create_table(
-        'boss_results',
+        "boss_results",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('run_id', sa.Integer(), sa.ForeignKey('nuzlocke_runs.id', ondelete='CASCADE'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('boss_battle_id', sa.Integer(), sa.ForeignKey('boss_battles.id'), nullable=False, index=True),
+            "run_id",
-        sa.Column('result', sa.String(10), nullable=False),
+            sa.Integer(),
-        sa.Column('attempts', sa.SmallInteger(), nullable=False, server_default='1'),
+            sa.ForeignKey("nuzlocke_runs.id", ondelete="CASCADE"),
-        sa.Column('completed_at', sa.DateTime(timezone=True), nullable=True),
+            nullable=False,
-        sa.UniqueConstraint('run_id', 'boss_battle_id', name='uq_boss_results_run_boss'),
+            index=True,
+        ),
+        sa.Column(
+            "boss_battle_id",
+            sa.Integer(),
+            sa.ForeignKey("boss_battles.id"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column("result", sa.String(10), nullable=False),
+        sa.Column("attempts", sa.SmallInteger(), nullable=False, server_default="1"),
+        sa.Column("completed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.UniqueConstraint(
+            "run_id", "boss_battle_id", name="uq_boss_results_run_boss"
+        ),
     )
 
 
 def downgrade() -> None:
-    op.drop_table('boss_results')
+    op.drop_table("boss_results")
-    op.drop_table('boss_pokemon')
+    op.drop_table("boss_pokemon")
-    op.drop_table('boss_battles')
+    op.drop_table("boss_battles")

backend/src/app/alembic/versions/c3d4e5f6a7b8_add_route_grouping.py

@@ -5,26 +5,26 @@ Revises: b2c3d4e5f6a7
 Create Date: 2026-02-06 12:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'c3d4e5f6a7b8'
+revision: str = "c3d4e5f6a7b8"
-down_revision: Union[str, Sequence[str], None] = 'b2c3d4e5f6a7'
+down_revision: str | Sequence[str] | None = "b2c3d4e5f6a7"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'routes',
+        "routes",
         sa.Column(
-            'parent_route_id',
+            "parent_route_id",
             sa.Integer(),
-            sa.ForeignKey('routes.id', ondelete='CASCADE'),
+            sa.ForeignKey("routes.id", ondelete="CASCADE"),
             nullable=True,
             index=True,
         ),
@@ -32,4 +32,4 @@ def upgrade() -> None:
 
 
 def downgrade() -> None:
-    op.drop_column('routes', 'parent_route_id')
+    op.drop_column("routes", "parent_route_id")

backend/src/app/alembic/versions/c3d4e5f6a7b9_add_retired_pokemon_ids_to_genlocke_legs.py

@@ -5,26 +5,26 @@ Revises: b2c3d4e5f6a8
 Create Date: 2026-02-09 18:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
+from alembic import op
 from sqlalchemy.dialects.postgresql import JSONB
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'c3d4e5f6a7b9'
+revision: str = "c3d4e5f6a7b9"
-down_revision: Union[str, Sequence[str], None] = 'b2c3d4e5f6a8'
+down_revision: str | Sequence[str] | None = "b2c3d4e5f6a8"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'genlocke_legs',
+        "genlocke_legs",
-        sa.Column('retired_pokemon_ids', JSONB(), nullable=True),
+        sa.Column("retired_pokemon_ids", JSONB(), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('genlocke_legs', 'retired_pokemon_ids')
+    op.drop_column("genlocke_legs", "retired_pokemon_ids")

backend/src/app/alembic/versions/d3e4f5a6b7c8_add_version_groups.py

@@ -5,28 +5,28 @@ Revises: c2d3e4f5a6b7
 Create Date: 2026-02-08 14:00:00.000000
 
 """
+
 import json
+from collections.abc import Sequence
 from pathlib import Path
-from typing import Sequence, Union
 
-from alembic import op
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'd3e4f5a6b7c8'
+revision: str = "d3e4f5a6b7c8"
-down_revision: Union[str, Sequence[str], None] = 'c2d3e4f5a6b7'
+down_revision: str | Sequence[str] | None = "c2d3e4f5a6b7"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     # 1. Create version_groups table
     op.create_table(
-        'version_groups',
+        "version_groups",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('name', sa.String(100), nullable=False),
+        sa.Column("name", sa.String(100), nullable=False),
-        sa.Column('slug', sa.String(100), nullable=False, unique=True),
+        sa.Column("slug", sa.String(100), nullable=False, unique=True),
     )
 
     # 2. Populate version groups from seed data
@@ -36,10 +36,10 @@ def upgrade() -> None:
 
     conn = op.get_bind()
     vg_table = sa.table(
-        'version_groups',
+        "version_groups",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('name', sa.String),
+        sa.column("name", sa.String),
-        sa.column('slug', sa.String),
+        sa.column("slug", sa.String),
     )
 
     # Build slug -> id mapping and game_slug -> vg_id mapping
@@ -49,8 +49,7 @@ def upgrade() -> None:
         vg_id = vg_idx
         # Use the slug as a readable name (e.g., "red-blue" -> "Red / Blue")
         vg_name = " / ".join(
-            g["name"].replace("Pokemon ", "")
+            g["name"].replace("Pokemon ", "") for g in vg_info["games"].values()
-            for g in vg_info["games"].values()
         )
         conn.execute(vg_table.insert().values(id=vg_id, name=vg_name, slug=vg_slug))
         slug_to_vg_id[vg_slug] = vg_id
@@ -58,16 +57,23 @@ def upgrade() -> None:
             game_slug_to_vg_id[game_slug] = vg_id
 
     # 3. Add version_group_id to games (nullable initially)
-    op.add_column('games', sa.Column('version_group_id', sa.Integer(),
+    op.add_column(
-                                     sa.ForeignKey('version_groups.id'), nullable=True))
+        "games",
-    op.create_index('ix_games_version_group_id', 'games', ['version_group_id'])
+        sa.Column(
+            "version_group_id",
+            sa.Integer(),
+            sa.ForeignKey("version_groups.id"),
+            nullable=True,
+        ),
+    )
+    op.create_index("ix_games_version_group_id", "games", ["version_group_id"])
 
     # Populate games.version_group_id from the mapping
     games_table = sa.table(
-        'games',
+        "games",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('slug', sa.String),
+        sa.column("slug", sa.String),
-        sa.column('version_group_id', sa.Integer),
+        sa.column("version_group_id", sa.Integer),
     )
     rows = conn.execute(sa.select(games_table.c.id, games_table.c.slug)).fetchall()
     for game_id, game_slug in rows:
@@ -80,21 +86,23 @@ def upgrade() -> None:
             )
 
     # 4. Add game_id to route_encounters (nullable initially), populate from routes.game_id
-    op.add_column('route_encounters', sa.Column('game_id', sa.Integer(),
+    op.add_column(
-                                                sa.ForeignKey('games.id'), nullable=True))
+        "route_encounters",
-    op.create_index('ix_route_encounters_game_id', 'route_encounters', ['game_id'])
+        sa.Column("game_id", sa.Integer(), sa.ForeignKey("games.id"), nullable=True),
+    )
+    op.create_index("ix_route_encounters_game_id", "route_encounters", ["game_id"])
 
     routes_table = sa.table(
-        'routes',
+        "routes",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('name', sa.String),
+        sa.column("name", sa.String),
-        sa.column('game_id', sa.Integer),
+        sa.column("game_id", sa.Integer),
     )
     re_table = sa.table(
-        'route_encounters',
+        "route_encounters",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('route_id', sa.Integer),
+        sa.column("route_id", sa.Integer),
-        sa.column('game_id', sa.Integer),
+        sa.column("game_id", sa.Integer),
     )
     # Populate route_encounters.game_id from routes.game_id via join
     conn.execute(
@@ -104,10 +112,11 @@ def upgrade() -> None:
     )
 
     # 5. Drop old unique constraint on route_encounters, add new one with game_id
-    op.drop_constraint('uq_route_pokemon_method', 'route_encounters', type_='unique')
+    op.drop_constraint("uq_route_pokemon_method", "route_encounters", type_="unique")
     op.create_unique_constraint(
-        'uq_route_pokemon_method_game', 'route_encounters',
+        "uq_route_pokemon_method_game",
-        ['route_id', 'pokemon_id', 'encounter_method', 'game_id']
+        "route_encounters",
+        ["route_id", "pokemon_id", "encounter_method", "game_id"],
     )
 
     # 6. Deduplicate routes within version groups
@@ -115,15 +124,15 @@ def upgrade() -> None:
     # and re-point route_encounters, encounters, and boss_battles to canonical routes
 
     encounters_table = sa.table(
-        'encounters',
+        "encounters",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('route_id', sa.Integer),
+        sa.column("route_id", sa.Integer),
     )
     boss_battles_table = sa.table(
-        'boss_battles',
+        "boss_battles",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('game_id', sa.Integer),
+        sa.column("game_id", sa.Integer),
-        sa.column('after_route_id', sa.Integer),
+        sa.column("after_route_id", sa.Integer),
     )
 
     # Get all version groups that have more than one game
@@ -149,16 +158,18 @@ def upgrade() -> None:
 
         # Get canonical routes (by name)
         canonical_routes = conn.execute(
-            sa.select(routes_table.c.id, routes_table.c.name)
+            sa.select(routes_table.c.id, routes_table.c.name).where(
-            .where(routes_table.c.game_id == canonical_game_id)
+                routes_table.c.game_id == canonical_game_id
+            )
         ).fetchall()
         canonical_name_to_id = {name: rid for rid, name in canonical_routes}
 
         # For each non-canonical game, re-point references to canonical routes
         for nc_game_id in non_canonical_game_ids:
             nc_routes = conn.execute(
-                sa.select(routes_table.c.id, routes_table.c.name)
+                sa.select(routes_table.c.id, routes_table.c.name).where(
-                .where(routes_table.c.game_id == nc_game_id)
+                    routes_table.c.game_id == nc_game_id
+                )
             ).fetchall()
 
             for old_route_id, route_name in nc_routes:
@@ -192,29 +203,36 @@ def upgrade() -> None:
         conn.execute(
             sa.text(
                 "DELETE FROM routes WHERE parent_route_id IS NOT NULL AND game_id IN :nc_ids"
-            ).bindparams(sa.bindparam('nc_ids', expanding=True)),
+            ).bindparams(sa.bindparam("nc_ids", expanding=True)),
-            {"nc_ids": non_canonical_game_ids}
+            {"nc_ids": non_canonical_game_ids},
         )
         # Then delete parent routes
         conn.execute(
-            sa.text(
+            sa.text("DELETE FROM routes WHERE game_id IN :nc_ids").bindparams(
-                "DELETE FROM routes WHERE game_id IN :nc_ids"
+                sa.bindparam("nc_ids", expanding=True)
-            ).bindparams(sa.bindparam('nc_ids', expanding=True)),
+            ),
-            {"nc_ids": non_canonical_game_ids}
+            {"nc_ids": non_canonical_game_ids},
         )
 
     # 7. Add version_group_id to routes (nullable), populate from games.version_group_id
-    op.add_column('routes', sa.Column('version_group_id', sa.Integer(),
+    op.add_column(
-                                      sa.ForeignKey('version_groups.id'), nullable=True))
+        "routes",
-    op.create_index('ix_routes_version_group_id', 'routes', ['version_group_id'])
+        sa.Column(
+            "version_group_id",
+            sa.Integer(),
+            sa.ForeignKey("version_groups.id"),
+            nullable=True,
+        ),
+    )
+    op.create_index("ix_routes_version_group_id", "routes", ["version_group_id"])
 
     # Need to re-declare routes_table with version_group_id
     routes_table_v2 = sa.table(
-        'routes',
+        "routes",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('name', sa.String),
+        sa.column("name", sa.String),
-        sa.column('game_id', sa.Integer),
+        sa.column("game_id", sa.Integer),
-        sa.column('version_group_id', sa.Integer),
+        sa.column("version_group_id", sa.Integer),
     )
 
     # Populate routes.version_group_id from the game's version_group_id
@@ -225,24 +243,32 @@ def upgrade() -> None:
     )
 
     # 8. Drop routes.game_id, drop old unique constraint, add new one
-    op.drop_constraint('uq_routes_game_name', 'routes', type_='unique')
+    op.drop_constraint("uq_routes_game_name", "routes", type_="unique")
-    op.drop_index('ix_routes_game_id', 'routes')
+    op.drop_index("ix_routes_game_id", "routes")
-    op.drop_column('routes', 'game_id')
+    op.drop_column("routes", "game_id")
     op.create_unique_constraint(
-        'uq_routes_version_group_name', 'routes',
+        "uq_routes_version_group_name", "routes", ["version_group_id", "name"]
-        ['version_group_id', 'name']
     )
 
     # 9. Add version_group_id to boss_battles (nullable), populate from games.version_group_id
-    op.add_column('boss_battles', sa.Column('version_group_id', sa.Integer(),
+    op.add_column(
-                                            sa.ForeignKey('version_groups.id'), nullable=True))
+        "boss_battles",
-    op.create_index('ix_boss_battles_version_group_id', 'boss_battles', ['version_group_id'])
+        sa.Column(
+            "version_group_id",
+            sa.Integer(),
+            sa.ForeignKey("version_groups.id"),
+            nullable=True,
+        ),
+    )
+    op.create_index(
+        "ix_boss_battles_version_group_id", "boss_battles", ["version_group_id"]
+    )
 
     bb_table_v2 = sa.table(
-        'boss_battles',
+        "boss_battles",
-        sa.column('id', sa.Integer),
+        sa.column("id", sa.Integer),
-        sa.column('game_id', sa.Integer),
+        sa.column("game_id", sa.Integer),
-        sa.column('version_group_id', sa.Integer),
+        sa.column("version_group_id", sa.Integer),
     )
 
     conn.execute(
@@ -252,14 +278,14 @@ def upgrade() -> None:
     )
 
     # 10. Drop boss_battles.game_id
-    op.drop_index('ix_boss_battles_game_id', 'boss_battles')
+    op.drop_index("ix_boss_battles_game_id", "boss_battles")
-    op.drop_column('boss_battles', 'game_id')
+    op.drop_column("boss_battles", "game_id")
 
     # 11. Make columns non-nullable
-    op.alter_column('route_encounters', 'game_id', nullable=False)
+    op.alter_column("route_encounters", "game_id", nullable=False)
-    op.alter_column('routes', 'version_group_id', nullable=False)
+    op.alter_column("routes", "version_group_id", nullable=False)
-    op.alter_column('boss_battles', 'version_group_id', nullable=False)
+    op.alter_column("boss_battles", "version_group_id", nullable=False)
-    op.alter_column('games', 'version_group_id', nullable=False)
+    op.alter_column("games", "version_group_id", nullable=False)
 
 
 def downgrade() -> None:

backend/src/app/alembic/versions/d4e5f6a7b8c9_add_game_color.py

@@ -5,25 +5,25 @@ Revises: c3d4e5f6a7b8
 Create Date: 2026-02-06 14:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'd4e5f6a7b8c9'
+revision: str = "d4e5f6a7b8c9"
-down_revision: Union[str, Sequence[str], None] = 'c3d4e5f6a7b8'
+down_revision: str | Sequence[str] | None = "c3d4e5f6a7b8"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'games',
+        "games",
-        sa.Column('color', sa.String(7), nullable=True),
+        sa.Column("color", sa.String(7), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('games', 'color')
+    op.drop_column("games", "color")

backend/src/app/alembic/versions/d4e5f6a7b9c0_add_hof_encounter_ids_to_nuzlocke_runs.py

@@ -5,26 +5,26 @@ Revises: c3d4e5f6a7b9
 Create Date: 2026-02-09 20:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
+from alembic import op
 from sqlalchemy.dialects.postgresql import JSONB
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'd4e5f6a7b9c0'
+revision: str = "d4e5f6a7b9c0"
-down_revision: Union[str, Sequence[str], None] = 'c3d4e5f6a7b9'
+down_revision: str | Sequence[str] | None = "c3d4e5f6a7b9"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'nuzlocke_runs',
+        "nuzlocke_runs",
-        sa.Column('hof_encounter_ids', JSONB(), nullable=True),
+        sa.Column("hof_encounter_ids", JSONB(), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('nuzlocke_runs', 'hof_encounter_ids')
+    op.drop_column("nuzlocke_runs", "hof_encounter_ids")

backend/src/app/alembic/versions/e4f5a6b7c8d9_add_boss_battles_unique_constraint.py

@@ -5,25 +5,27 @@ Revises: d3e4f5a6b7c8
 Create Date: 2026-02-08 18:00:00.000000
 
 """
-from typing import Sequence, Union
+
+from collections.abc import Sequence
 
 from alembic import op
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'e4f5a6b7c8d9'
+revision: str = "e4f5a6b7c8d9"
-down_revision: Union[str, Sequence[str], None] = 'd3e4f5a6b7c8'
+down_revision: str | Sequence[str] | None = "d3e4f5a6b7c8"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.create_unique_constraint(
-        'uq_boss_battles_version_group_order',
+        "uq_boss_battles_version_group_order",
-        'boss_battles',
+        "boss_battles",
-        ['version_group_id', 'order'],
+        ["version_group_id", "order"],
     )
 
 
 def downgrade() -> None:
-    op.drop_constraint('uq_boss_battles_version_group_order', 'boss_battles', type_='unique')
+    op.drop_constraint(
+        "uq_boss_battles_version_group_order", "boss_battles", type_="unique"
+    )

backend/src/app/alembic/versions/e5f6a7b8c9d0_rename_national_dex_add_pokeapi_id.py

@@ -5,24 +5,25 @@ Revises: d4e5f6a7b8c9
 Create Date: 2026-02-07 10:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'e5f6a7b8c9d0'
+revision: str = "e5f6a7b8c9d0"
-down_revision: Union[str, Sequence[str], None] = 'd4e5f6a7b8c9'
+down_revision: str | Sequence[str] | None = "d4e5f6a7b8c9"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     # Rename national_dex -> pokeapi_id and widen to Integer
     op.alter_column(
-        'pokemon', 'national_dex',
+        "pokemon",
-        new_column_name='pokeapi_id',
+        "national_dex",
+        new_column_name="pokeapi_id",
         type_=sa.Integer(),
         existing_type=sa.SmallInteger(),
         existing_nullable=False,
@@ -30,23 +31,26 @@ def upgrade() -> None:
 
     # Add real national_dex column (shared between forms and base species)
     op.add_column(
-        'pokemon',
+        "pokemon",
-        sa.Column('national_dex', sa.SmallInteger(), nullable=False, server_default='0'),
+        sa.Column(
+            "national_dex", sa.SmallInteger(), nullable=False, server_default="0"
+        ),
     )
 
     # Populate national_dex = pokeapi_id for all existing rows
     # (correct for base species; forms will be fixed by re-seeding)
-    op.execute('UPDATE pokemon SET national_dex = pokeapi_id')
+    op.execute("UPDATE pokemon SET national_dex = pokeapi_id")
 
     # Remove the default now that all rows are populated
-    op.alter_column('pokemon', 'national_dex', server_default=None)
+    op.alter_column("pokemon", "national_dex", server_default=None)
 
 
 def downgrade() -> None:
-    op.drop_column('pokemon', 'national_dex')
+    op.drop_column("pokemon", "national_dex")
     op.alter_column(
-        'pokemon', 'pokeapi_id',
+        "pokemon",
-        new_column_name='national_dex',
+        "pokeapi_id",
+        new_column_name="national_dex",
         type_=sa.SmallInteger(),
         existing_type=sa.Integer(),
         existing_nullable=False,

backend/src/app/alembic/versions/e5f6a7b9c0d1_add_genlocke_transfers_table.py

@@ -5,32 +5,55 @@ Revises: d4e5f6a7b9c0
 Create Date: 2026-02-09 22:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'e5f6a7b9c0d1'
+revision: str = "e5f6a7b9c0d1"
-down_revision: Union[str, Sequence[str], None] = 'd4e5f6a7b9c0'
+down_revision: str | Sequence[str] | None = "d4e5f6a7b9c0"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.create_table(
-        'genlocke_transfers',
+        "genlocke_transfers",
-        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column('genlocke_id', sa.Integer(), sa.ForeignKey('genlockes.id', ondelete='CASCADE'), nullable=False, index=True),
+        sa.Column(
-        sa.Column('source_encounter_id', sa.Integer(), sa.ForeignKey('encounters.id'), nullable=False, index=True),
+            "genlocke_id",
-        sa.Column('target_encounter_id', sa.Integer(), sa.ForeignKey('encounters.id'), nullable=False, unique=True),
+            sa.Integer(),
-        sa.Column('source_leg_order', sa.SmallInteger(), nullable=False),
+            sa.ForeignKey("genlockes.id", ondelete="CASCADE"),
-        sa.Column('target_leg_order', sa.SmallInteger(), nullable=False),
+            nullable=False,
-        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+            index=True,
-        sa.UniqueConstraint('target_encounter_id', name='uq_genlocke_transfers_target'),
+        ),
+        sa.Column(
+            "source_encounter_id",
+            sa.Integer(),
+            sa.ForeignKey("encounters.id"),
+            nullable=False,
+            index=True,
+        ),
+        sa.Column(
+            "target_encounter_id",
+            sa.Integer(),
+            sa.ForeignKey("encounters.id"),
+            nullable=False,
+            unique=True,
+        ),
+        sa.Column("source_leg_order", sa.SmallInteger(), nullable=False),
+        sa.Column("target_leg_order", sa.SmallInteger(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.UniqueConstraint("target_encounter_id", name="uq_genlocke_transfers_target"),
     )
 
 
 def downgrade() -> None:
-    op.drop_table('genlocke_transfers')
+    op.drop_table("genlocke_transfers")

backend/src/app/alembic/versions/f5a6b7c8d9e0_add_section_to_boss_battles.py

@@ -5,22 +5,22 @@ Revises: e4f5a6b7c8d9
 Create Date: 2026-02-08 20:00:00.000000
 
 """
-from typing import Sequence, Union
+
+from collections.abc import Sequence
 
 import sqlalchemy as sa
 from alembic import op
 
-
 # revision identifiers, used by Alembic.
-revision: str = 'f5a6b7c8d9e0'
+revision: str = "f5a6b7c8d9e0"
-down_revision: Union[str, Sequence[str], None] = 'e4f5a6b7c8d9'
+down_revision: str | Sequence[str] | None = "e4f5a6b7c8d9"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
-    op.add_column('boss_battles', sa.Column('section', sa.String(100), nullable=True))
+    op.add_column("boss_battles", sa.Column("section", sa.String(100), nullable=True))
 
 
 def downgrade() -> None:
-    op.drop_column('boss_battles', 'section')
+    op.drop_column("boss_battles", "section")

backend/src/app/alembic/versions/f6a7b8c9d0e1_add_region_to_evolutions.py

@@ -5,25 +5,25 @@ Revises: e5f6a7b8c9d0
 Create Date: 2026-02-07 12:00:00.000000
 
 """
-from typing import Sequence, Union
 
-from alembic import op
+from collections.abc import Sequence
+
 import sqlalchemy as sa
-
+from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = 'f6a7b8c9d0e1'
+revision: str = "f6a7b8c9d0e1"
-down_revision: Union[str, Sequence[str], None] = 'e5f6a7b8c9d0'
+down_revision: str | Sequence[str] | None = "e5f6a7b8c9d0"
-branch_labels: Union[str, Sequence[str], None] = None
+branch_labels: str | Sequence[str] | None = None
-depends_on: Union[str, Sequence[str], None] = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade() -> None:
     op.add_column(
-        'evolutions',
+        "evolutions",
-        sa.Column('region', sa.String(30), nullable=True),
+        sa.Column("region", sa.String(30), nullable=True),
     )
 
 
 def downgrade() -> None:
-    op.drop_column('evolutions', 'region')
+    op.drop_column("evolutions", "region")

backend/src/app/api/bosses.py

@@ -1,4 +1,4 @@
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 from fastapi import APIRouter, Depends, HTTPException, Response
 from sqlalchemy import select
@@ -33,7 +33,9 @@ async def _get_version_group_id(session: AsyncSession, game_id: int) -> int:
     if game is None:
         raise HTTPException(status_code=404, detail="Game not found")
     if game.version_group_id is None:
-        raise HTTPException(status_code=400, detail="Game has no version group assigned")
+        raise HTTPException(
+            status_code=400, detail="Game has no version group assigned"
+        )
     return game.version_group_id
 
 
@@ -41,9 +43,7 @@ async def _get_version_group_id(session: AsyncSession, game_id: int) -> int:
 
 
 @router.get("/games/{game_id}/bosses", response_model=list[BossBattleResponse])
-async def list_bosses(
+async def list_bosses(game_id: int, session: AsyncSession = Depends(get_session)):
-    game_id: int, session: AsyncSession = Depends(get_session)
-):
     vg_id = await _get_version_group_id(session, game_id)
 
     result = await session.execute(
@@ -72,7 +72,9 @@ async def reorder_bosses(
     bosses = {b.id: b for b in result.scalars().all()}
 
     if len(bosses) != len(boss_ids):
-        raise HTTPException(status_code=400, detail="Some boss IDs not found in this game")
+        raise HTTPException(
+            status_code=400, detail="Some boss IDs not found in this game"
+        )
 
     # Phase 1: set temporary negative orders to avoid unique constraint violations
     for i, item in enumerate(data.bosses):
@@ -94,7 +96,9 @@ async def reorder_bosses(
     return result.scalars().all()
 
 
-@router.post("/games/{game_id}/bosses", response_model=BossBattleResponse, status_code=201)
+@router.post(
+    "/games/{game_id}/bosses", response_model=BossBattleResponse, status_code=201
+)
 async def create_boss(
     game_id: int,
     data: BossBattleCreate,
@@ -157,7 +161,9 @@ async def delete_boss(
     vg_id = await _get_version_group_id(session, game_id)
 
     result = await session.execute(
-        select(BossBattle).where(BossBattle.id == boss_id, BossBattle.version_group_id == vg_id)
+        select(BossBattle).where(
+            BossBattle.id == boss_id, BossBattle.version_group_id == vg_id
+        )
     )
     boss = result.scalar_one_or_none()
     if boss is None:
@@ -188,9 +194,13 @@ async def bulk_import_bosses(
 
     bosses_data = [item.model_dump() for item in items]
     try:
-        count = await upsert_bosses(session, vg_id, bosses_data, dex_to_id, route_name_to_id)
+        count = await upsert_bosses(
+            session, vg_id, bosses_data, dex_to_id, route_name_to_id
+        )
     except Exception as e:
-        raise HTTPException(status_code=400, detail=f"Failed to import bosses: {e}")
+        raise HTTPException(
+            status_code=400, detail=f"Failed to import bosses: {e}"
+        ) from e
 
     await session.commit()
     return BulkImportResult(created=count, updated=0, errors=[])
@@ -252,22 +262,20 @@ async def set_boss_team(
 
 
 @router.get("/runs/{run_id}/boss-results", response_model=list[BossResultResponse])
-async def list_boss_results(
+async def list_boss_results(run_id: int, session: AsyncSession = Depends(get_session)):
-    run_id: int, session: AsyncSession = Depends(get_session)
-):
     run = await session.get(NuzlockeRun, run_id)
     if run is None:
         raise HTTPException(status_code=404, detail="Run not found")
 
     result = await session.execute(
-        select(BossResult)
+        select(BossResult).where(BossResult.run_id == run_id).order_by(BossResult.id)
-        .where(BossResult.run_id == run_id)
-        .order_by(BossResult.id)
     )
     return result.scalars().all()
 
 
-@router.post("/runs/{run_id}/boss-results", response_model=BossResultResponse, status_code=201)
+@router.post(
+    "/runs/{run_id}/boss-results", response_model=BossResultResponse, status_code=201
+)
 async def create_boss_result(
     run_id: int,
     data: BossResultCreate,
@@ -293,14 +301,14 @@ async def create_boss_result(
     if result:
         result.result = data.result
         result.attempts = data.attempts
-        result.completed_at = datetime.now(timezone.utc) if data.result == "won" else None
+        result.completed_at = datetime.now(UTC) if data.result == "won" else None
     else:
         result = BossResult(
             run_id=run_id,
             boss_battle_id=data.boss_battle_id,
             result=data.result,
             attempts=data.attempts,
-            completed_at=datetime.now(timezone.utc) if data.result == "won" else None,
+            completed_at=datetime.now(UTC) if data.result == "won" else None,
         )
         session.add(result)
 

backend/src/app/api/encounters.py

@@ -8,8 +8,8 @@ from sqlalchemy.orm import joinedload, selectinload
 from app.core.database import get_session
 from app.models.encounter import Encounter
 from app.models.evolution import Evolution
-from app.models.genlocke_transfer import GenlockeTransfer
 from app.models.genlocke import GenlockeLeg
+from app.models.genlocke_transfer import GenlockeTransfer
 from app.models.nuzlocke_run import NuzlockeRun
 from app.models.pokemon import Pokemon
 from app.models.route import Route
@@ -60,7 +60,11 @@ async def create_encounter(
 
     # Shiny clause: shiny encounters bypass the route-lock check
     shiny_clause_on = run.rules.get("shinyClause", True) if run.rules else True
-    skip_route_lock = (data.is_shiny and shiny_clause_on) or data.origin in ("shed_evolution", "egg", "transfer")
+    skip_route_lock = (data.is_shiny and shiny_clause_on) or data.origin in (
+        "shed_evolution",
+        "egg",
+        "transfer",
+    )
 
     # If this route has a parent, check if sibling already has an encounter
     if route.parent_route_id is not None and not skip_route_lock:
@@ -78,7 +82,8 @@ async def create_encounter(
             # Zone-aware: only check siblings in the same zone (null treated as 0)
             my_zone = route.pinwheel_zone if route.pinwheel_zone is not None else 0
             sibling_ids = [
-                s.id for s in siblings
+                s.id
+                for s in siblings
                 if (s.pinwheel_zone if s.pinwheel_zone is not None else 0) == my_zone
             ]
         else:
@@ -89,8 +94,7 @@ async def create_encounter(
         # Exclude transfer-target encounters so they don't block the starter
         transfer_target_ids = select(GenlockeTransfer.target_encounter_id)
         existing_encounter = await session.execute(
-            select(Encounter)
+            select(Encounter).where(
-            .where(
                 Encounter.run_id == run_id,
                 Encounter.route_id.in_(sibling_ids),
                 ~Encounter.id.in_(transfer_target_ids),
@@ -197,6 +201,7 @@ async def bulk_randomize_encounters(
 
     # 2. Get version_group_id from game
     from app.models.game import Game
+
     game = await session.get(Game, game_id)
     if game is None or game.version_group_id is None:
         raise HTTPException(status_code=400, detail="Game has no version group")
@@ -257,8 +262,7 @@ async def bulk_randomize_encounters(
         leg = leg_result.scalar_one_or_none()
         if leg:
             genlocke_result = await session.execute(
-                select(GenlockeLeg.retired_pokemon_ids)
+                select(GenlockeLeg.retired_pokemon_ids).where(
-                .where(
                     GenlockeLeg.genlocke_id == leg.genlocke_id,
                     GenlockeLeg.leg_order < leg.leg_order,
                     GenlockeLeg.retired_pokemon_ids.isnot(None),
@@ -268,7 +272,6 @@ async def bulk_randomize_encounters(
                 duped.update(retired_ids)
 
     # 8. Organize routes: identify top-level and children
-    routes_by_id = {r.id: r for r in all_routes}
     top_level = [r for r in all_routes if r.parent_route_id is None]
     children_by_parent: dict[int, list[Route]] = {}
     for r in all_routes:
@@ -289,7 +292,11 @@ async def bulk_randomize_encounters(
             if parent_route.id in encountered_route_ids:
                 continue
             available = route_pokemon.get(parent_route.id, [])
-            eligible = [p for p in available if p not in duped] if dupes_clause_on else available
+            eligible = (
+                [p for p in available if p not in duped]
+                if dupes_clause_on
+                else available
+            )
             if not eligible:
                 skipped += 1
                 continue
@@ -335,7 +342,11 @@ async def bulk_randomize_encounters(
                             if p not in zone_pokemon:
                                 zone_pokemon.append(p)
 
-                    eligible = [p for p in zone_pokemon if p not in duped] if dupes_clause_on else zone_pokemon
+                    eligible = (
+                        [p for p in zone_pokemon if p not in duped]
+                        if dupes_clause_on
+                        else zone_pokemon
+                    )
                     if not eligible:
                         skipped += 1
                         continue
@@ -371,7 +382,11 @@ async def bulk_randomize_encounters(
                         if p not in group_pokemon:
                             group_pokemon.append(p)
 
-                eligible = [p for p in group_pokemon if p not in duped] if dupes_clause_on else group_pokemon
+                eligible = (
+                    [p for p in group_pokemon if p not in duped]
+                    if dupes_clause_on
+                    else group_pokemon
+                )
                 if not eligible:
                     skipped += 1
                     continue

backend/src/app/api/evolutions.py

@@ -26,17 +26,18 @@ async def list_evolutions(
     offset: int = Query(0, ge=0),
     session: AsyncSession = Depends(get_session),
 ):
-    base_query = (
+    base_query = select(Evolution).options(
-        select(Evolution)
+        joinedload(Evolution.from_pokemon), joinedload(Evolution.to_pokemon)
-        .options(joinedload(Evolution.from_pokemon), joinedload(Evolution.to_pokemon))
     )
 
     if search:
         search_lower = search.lower()
         # Join pokemon to search by name
-        from_pokemon = select(Pokemon.id).where(
+        from_pokemon = (
-            func.lower(Pokemon.name).contains(search_lower)
+            select(Pokemon.id)
-        ).scalar_subquery()
+            .where(func.lower(Pokemon.name).contains(search_lower))
+            .scalar_subquery()
+        )
         base_query = base_query.where(
             or_(
                 Evolution.from_pokemon_id.in_(from_pokemon),
@@ -52,9 +53,11 @@ async def list_evolutions(
     count_base = select(Evolution)
     if search:
         search_lower = search.lower()
-        from_pokemon = select(Pokemon.id).where(
+        from_pokemon = (
-            func.lower(Pokemon.name).contains(search_lower)
+            select(Pokemon.id)
-        ).scalar_subquery()
+            .where(func.lower(Pokemon.name).contains(search_lower))
+            .scalar_subquery()
+        )
         count_base = count_base.where(
             or_(
                 Evolution.from_pokemon_id.in_(from_pokemon),
@@ -68,7 +71,11 @@ async def list_evolutions(
     count_query = select(func.count()).select_from(count_base.subquery())
     total = (await session.execute(count_query)).scalar() or 0
 
-    items_query = base_query.order_by(Evolution.from_pokemon_id, Evolution.to_pokemon_id).offset(offset).limit(limit)
+    items_query = (
+        base_query.order_by(Evolution.from_pokemon_id, Evolution.to_pokemon_id)
+        .offset(offset)
+        .limit(limit)
+    )
     result = await session.execute(items_query)
     items = result.scalars().unique().all()
 
@@ -209,7 +216,9 @@ async def bulk_import_evolutions(
                 session.add(evolution)
                 created += 1
         except Exception as e:
-            errors.append(f"Evolution {item.from_pokeapi_id} -> {item.to_pokeapi_id}: {e}")
+            errors.append(
+                f"Evolution {item.from_pokeapi_id} -> {item.to_pokeapi_id}: {e}"
+            )
 
     await session.commit()
     return BulkImportResult(created=created, updated=updated, errors=errors)

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(
+    result = await session.execute(select(Game).order_by(Game.name))
-        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(
+    result = await session.execute(select(Pokemon).order_by(Pokemon.pokeapi_id))
-        select(Pokemon).order_by(Pokemon.pokeapi_id)
-    )
     pokemon_list = result.scalars().all()
     return [
         {

backend/src/app/api/games.py

@@ -40,7 +40,9 @@ async def _get_game_or_404(session: AsyncSession, game_id: int) -> Game:
 async def _get_version_group_id(session: AsyncSession, game_id: int) -> int:
     game = await _get_game_or_404(session, game_id)
     if game.version_group_id is None:
-        raise HTTPException(status_code=400, detail="Game has no version group assigned")
+        raise HTTPException(
+            status_code=400, detail="Game has no version group assigned"
+        )
     return game.version_group_id
 
 
@@ -68,7 +70,8 @@ async def list_games_by_region(session: AsyncSession = Depends(get_session)):
     for region in regions_data:
         region_games = games_by_region.get(region["name"], [])
         defaults = region["genlocke_defaults"]
-        response.append({
+        response.append(
+            {
                 "name": region["name"],
                 "generation": region["generation"],
                 "order": region["order"],
@@ -77,7 +80,8 @@ async def list_games_by_region(session: AsyncSession = Depends(get_session)):
                     "normal_genlocke": defaults["normal"],
                 },
                 "games": region_games,
-        })
+            }
+        )
 
     return response
 
@@ -89,9 +93,7 @@ async def get_game(game_id: int, session: AsyncSession = Depends(get_session)):
 
     # Load routes via version_group_id
     result = await session.execute(
-        select(Route)
+        select(Route).where(Route.version_group_id == vg_id).order_by(Route.order)
-        .where(Route.version_group_id == vg_id)
-        .order_by(Route.order)
     )
     routes = result.scalars().all()
 
@@ -149,10 +151,13 @@ async def list_game_routes(
 
     def route_to_dict(route: Route) -> dict:
         # Only show encounter methods for the requested game
-        methods = sorted({
+        methods = sorted(
-            re.encounter_method for re in route.route_encounters
+            {
+                re.encounter_method
+                for re in route.route_encounters
                 if re.game_id == game_id
-        })
+            }
+        )
         return {
             "id": route.id,
             "name": route.name,
@@ -193,14 +198,12 @@ async def list_game_routes(
 
 
 @router.post("", response_model=GameResponse, status_code=201)
-async def create_game(
+async def create_game(data: GameCreate, session: AsyncSession = Depends(get_session)):
-    data: GameCreate, session: AsyncSession = Depends(get_session)
+    existing = await session.execute(select(Game).where(Game.slug == data.slug))
-):
-    existing = await session.execute(
-        select(Game).where(Game.slug == data.slug)
-    )
     if existing.scalar_one_or_none() is not None:
-        raise HTTPException(status_code=409, detail="Game with this slug already exists")
+        raise HTTPException(
+            status_code=409, detail="Game with this slug already exists"
+        )
 
     game = Game(**data.model_dump())
     session.add(game)
@@ -223,7 +226,9 @@ async def update_game(
             select(Game).where(Game.slug == update_data["slug"], Game.id != game_id)
         )
         if existing.scalar_one_or_none() is not None:
-            raise HTTPException(status_code=409, detail="Game with this slug already exists")
+            raise HTTPException(
+                status_code=409, detail="Game with this slug already exists"
+            )
 
     for field, value in update_data.items():
         setattr(game, field, value)
@@ -234,9 +239,7 @@ async def update_game(
 
 
 @router.delete("/{game_id}", status_code=204)
-async def delete_game(
+async def delete_game(game_id: int, session: AsyncSession = Depends(get_session)):
-    game_id: int, session: AsyncSession = Depends(get_session)
-):
     result = await session.execute(
         select(Game).where(Game.id == game_id).options(selectinload(Game.runs))
     )
@@ -393,7 +396,9 @@ async def bulk_import_routes(
     try:
         route_name_to_id = await upsert_routes(session, vg_id, routes_data)
     except Exception as e:
-        raise HTTPException(status_code=400, detail=f"Failed to import routes: {e}")
+        raise HTTPException(
+            status_code=400, detail=f"Failed to import routes: {e}"
+        ) from e
 
     # Upsert encounters for each route
     encounter_count = 0
@@ -406,8 +411,11 @@ async def bulk_import_routes(
         if item.encounters:
             try:
                 count = await upsert_route_encounters(
-                    session, route_id, [e.model_dump() for e in item.encounters],
+                    session,
-                    dex_to_id, game_id,
+                    route_id,
+                    [e.model_dump() for e in item.encounters],
+                    dex_to_id,
+                    game_id,
                 )
                 encounter_count += count
             except Exception as e:
@@ -422,8 +430,11 @@ async def bulk_import_routes(
             if child.encounters:
                 try:
                     count = await upsert_route_encounters(
-                        session, child_id, [e.model_dump() for e in child.encounters],
+                        session,
-                        dex_to_id, game_id,
+                        child_id,
+                        [e.model_dump() for e in child.encounters],
+                        dex_to_id,
+                        game_id,
                     )
                     encounter_count += count
                 except Exception as e:

backend/src/app/api/genlockes.py

@@ -1,6 +1,8 @@
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel
-from sqlalchemy import delete as sa_delete, func, select, update as sa_update
+from sqlalchemy import delete as sa_delete
+from sqlalchemy import func, select
+from sqlalchemy import update as sa_update
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
@@ -9,9 +11,9 @@ from app.models.encounter import Encounter
 from app.models.evolution import Evolution
 from app.models.game import Game
 from app.models.genlocke import Genlocke, GenlockeLeg
+from app.models.genlocke_transfer import GenlockeTransfer
 from app.models.nuzlocke_run import NuzlockeRun
 from app.models.pokemon import Pokemon
-from app.models.genlocke_transfer import GenlockeTransfer
 from app.models.route import Route
 from app.schemas.genlocke import (
     AddLegRequest,
@@ -74,9 +76,7 @@ async def list_genlockes(session: AsyncSession = Depends(get_session)):
 
 
 @router.get("/{genlocke_id}", response_model=GenlockeDetailResponse)
-async def get_genlocke(
+async def get_genlocke(genlocke_id: int, session: AsyncSession = Depends(get_session)):
-    genlocke_id: int, session: AsyncSession = Depends(get_session)
-):
     result = await session.execute(
         select(Genlocke)
         .where(Genlocke.id == genlocke_id)
@@ -112,7 +112,9 @@ async def get_genlocke(
     legs_completed = 0
     for leg in genlocke.legs:
         run_status = leg.run.status if leg.run else None
-        enc_count, death_count = stats_by_run.get(leg.run_id, (0, 0)) if leg.run_id else (0, 0)
+        enc_count, death_count = (
+            stats_by_run.get(leg.run_id, (0, 0)) if leg.run_id else (0, 0)
+        )
         total_encounters += enc_count
         total_deaths += death_count
         if run_status == "completed":
@@ -254,7 +256,9 @@ async def get_genlocke_graveyard(
                     )
                 )
 
-    deadliest = max(deaths_per_leg, key=lambda s: s.death_count) if deaths_per_leg else None
+    deadliest = (
+        max(deaths_per_leg, key=lambda s: s.death_count) if deaths_per_leg else None
+    )
 
     return GenlockeGraveyardResponse(
         entries=entries,
@@ -285,9 +289,7 @@ async def get_genlocke_lineages(
 
     # Query all transfers for this genlocke
     transfer_result = await session.execute(
-        select(GenlockeTransfer).where(
+        select(GenlockeTransfer).where(GenlockeTransfer.genlocke_id == genlocke_id)
-            GenlockeTransfer.genlocke_id == genlocke_id
-        )
     )
     transfers = transfer_result.scalars().all()
 
@@ -302,7 +304,11 @@ async def get_genlocke_lineages(
         backward.add(t.target_encounter_id)
 
     # Find roots: sources that are NOT targets
-    roots = [t.source_encounter_id for t in transfers if t.source_encounter_id not in backward]
+    roots = [
+        t.source_encounter_id
+        for t in transfers
+        if t.source_encounter_id not in backward
+    ]
     # Deduplicate while preserving order
     seen_roots: set[int] = set()
     unique_roots: list[int] = []
@@ -421,7 +427,7 @@ async def get_genlocke_lineages(
         )
 
     # Sort by first leg order, then by encounter ID
-    lineages.sort(key=lambda l: (l.legs[0].leg_order, l.legs[0].encounter_id))
+    lineages.sort(key=lambda lin: (lin.legs[0].leg_order, lin.legs[0].encounter_id))
 
     return GenlockeLineageResponse(
         lineages=lineages,
@@ -440,15 +446,11 @@ async def create_genlocke(
         raise HTTPException(status_code=400, detail="Name is required")
 
     # Validate all game_ids exist
-    result = await session.execute(
+    result = await session.execute(select(Game).where(Game.id.in_(data.game_ids)))
-        select(Game).where(Game.id.in_(data.game_ids))
-    )
     found_games = {g.id: g for g in result.scalars().all()}
     missing = [gid for gid in data.game_ids if gid not in found_games]
     if missing:
-        raise HTTPException(
+        raise HTTPException(status_code=404, detail=f"Games not found: {missing}")
-            status_code=404, detail=f"Games not found: {missing}"
-        )
 
     # Create genlocke
     genlocke = Genlocke(
@@ -578,9 +580,7 @@ async def advance_leg(
         raise HTTPException(status_code=404, detail="Genlocke not found")
 
     if genlocke.status != "active":
-        raise HTTPException(
+        raise HTTPException(status_code=400, detail="Genlocke is not active")
-            status_code=400, detail="Genlocke is not active"
-        )
 
     # Find the current leg
     current_leg = None
@@ -596,9 +596,7 @@ async def advance_leg(
 
     # Verify current leg's run is completed
     if current_leg.run_id is None:
-        raise HTTPException(
+        raise HTTPException(status_code=400, detail="Current leg has no run")
-            status_code=400, detail="Current leg has no run"
-        )
     current_run = await session.get(NuzlockeRun, current_leg.run_id)
     if current_run is None or current_run.status != "completed":
         raise HTTPException(
@@ -606,14 +604,10 @@ async def advance_leg(
         )
 
     if next_leg is None:
-        raise HTTPException(
+        raise HTTPException(status_code=400, detail="No next leg to advance to")
-            status_code=400, detail="No next leg to advance to"
-        )
 
     if next_leg.run_id is not None:
-        raise HTTPException(
+        raise HTTPException(status_code=400, detail="Next leg already has a run")
-            status_code=400, detail="Next leg already has a run"
-        )
 
     # Compute retired Pokemon families if retireHoF is enabled
     if genlocke.genlocke_rules.get("retireHoF", False):
@@ -807,10 +801,12 @@ async def get_retired_families(
     for leg in legs:
         ids = leg.retired_pokemon_ids or []
         cumulative.update(ids)
-        by_leg.append(RetiredLegResponse(
+        by_leg.append(
+            RetiredLegResponse(
                 leg_order=leg.leg_order,
                 retired_pokemon_ids=ids,
-        ))
+            )
+        )
 
     return RetiredFamiliesResponse(
         retired_pokemon_ids=sorted(cumulative),
@@ -837,8 +833,11 @@ async def update_genlocke(
 
     update_data = data.model_dump(exclude_unset=True)
 
-    if "status" in update_data:
+    if "status" in update_data and update_data["status"] not in (
-        if update_data["status"] not in ("active", "completed", "failed"):
+        "active",
+        "completed",
+        "failed",
+    ):
         raise HTTPException(
             status_code=400,
             detail="Status must be one of: active, completed, failed",
@@ -871,8 +870,7 @@ async def delete_genlocke(
     # Delete legs explicitly to avoid ORM cascade issues
     # (genlocke_id is non-nullable, so SQLAlchemy can't nullify it)
     await session.execute(
-        sa_delete(GenlockeLeg)
+        sa_delete(GenlockeLeg).where(GenlockeLeg.genlocke_id == genlocke_id)
-        .where(GenlockeLeg.genlocke_id == genlocke_id)
     )
 
     await session.delete(genlocke)

backend/src/app/api/pokemon.py

@@ -8,7 +8,6 @@ from app.models.evolution import Evolution
 from app.models.pokemon import Pokemon
 from app.models.route import Route
 from app.models.route_encounter import RouteEncounter
-from app.models.game import Game
 from app.schemas.pokemon import (
     BulkImportItem,
     BulkImportResult,
@@ -40,9 +39,7 @@ async def list_pokemon(
     # Build base query with optional search filter
     base_query = select(Pokemon)
     if search:
-        base_query = base_query.where(
+        base_query = base_query.where(func.lower(Pokemon.name).contains(search.lower()))
-            func.lower(Pokemon.name).contains(search.lower())
-        )
     if type:
         base_query = base_query.where(Pokemon.types.any(type))
 
@@ -51,7 +48,11 @@ async def list_pokemon(
     total = (await session.execute(count_query)).scalar() or 0
 
     # Get paginated items
-    items_query = base_query.order_by(Pokemon.national_dex, Pokemon.name).offset(offset).limit(limit)
+    items_query = (
+        base_query.order_by(Pokemon.national_dex, Pokemon.name)
+        .offset(offset)
+        .limit(limit)
+    )
     result = await session.execute(items_query)
     items = result.scalars().all()
 
@@ -156,9 +157,7 @@ async def get_pokemon_families(
 
 
 @router.get("/pokemon/{pokemon_id}", response_model=PokemonResponse)
-async def get_pokemon(
+async def get_pokemon(pokemon_id: int, session: AsyncSession = Depends(get_session)):
-    pokemon_id: int, session: AsyncSession = Depends(get_session)
-):
     pokemon = await session.get(Pokemon, pokemon_id)
     if pokemon is None:
         raise HTTPException(status_code=404, detail="Pokemon not found")
@@ -258,7 +257,8 @@ async def get_pokemon_evolution_chain(
 
     # Filter evolutions to only those in the family
     family_evo_ids = [
-        evo.id for evo in evolutions
+        evo.id
+        for evo in evolutions
         if evo.from_pokemon_id in family and evo.to_pokemon_id in family
     ]
 
@@ -294,9 +294,7 @@ async def get_pokemon_evolutions(
         .options(joinedload(Evolution.to_pokemon))
     )
     if region is not None:
-        query = query.where(
+        query = query.where(or_(Evolution.region.is_(None), Evolution.region == region))
-            or_(Evolution.region.is_(None), Evolution.region == region)
-        )
     result = await session.execute(query)
     evolutions = result.scalars().unique().all()
 
@@ -309,7 +307,8 @@ async def get_pokemon_evolutions(
         }
         if regional_keys:
             evolutions = [
-                e for e in evolutions
+                e
+                for e in evolutions
                 if e.region is not None or (e.trigger, e.item) not in regional_keys
             ]
 
@@ -349,9 +348,7 @@ async def update_pokemon(
 
 
 @router.delete("/pokemon/{pokemon_id}", status_code=204)
-async def delete_pokemon(
+async def delete_pokemon(pokemon_id: int, session: AsyncSession = Depends(get_session)):
-    pokemon_id: int, session: AsyncSession = Depends(get_session)
-):
     result = await session.execute(
         select(Pokemon)
         .where(Pokemon.id == pokemon_id)

backend/src/app/api/routes.py

@@ -1,6 +1,17 @@
 from fastapi import APIRouter
 
-from app.api import bosses, encounters, evolutions, export, games, genlockes, health, pokemon, runs, stats
+from app.api import (
+    bosses,
+    encounters,
+    evolutions,
+    export,
+    games,
+    genlockes,
+    health,
+    pokemon,
+    runs,
+    stats,
+)
 
 api_router = APIRouter()
 api_router.include_router(health.router)

backend/src/app/api/runs.py

@@ -1,4 +1,4 @@
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 from fastapi import APIRouter, Depends, HTTPException, Response
 from sqlalchemy import func, select
@@ -9,18 +9,22 @@ from app.core.database import get_session
 from app.models.boss_result import BossResult
 from app.models.encounter import Encounter
 from app.models.game import Game
-from app.models.genlocke import Genlocke, GenlockeLeg
+from app.models.genlocke import GenlockeLeg
 from app.models.genlocke_transfer import GenlockeTransfer
 from app.models.nuzlocke_run import NuzlockeRun
-from app.schemas.run import RunCreate, RunDetailResponse, RunGenlockeContext, RunResponse, RunUpdate
+from app.schemas.run import (
+    RunCreate,
+    RunDetailResponse,
+    RunGenlockeContext,
+    RunResponse,
+    RunUpdate,
+)
 
 router = APIRouter()
 
 
 @router.post("", response_model=RunResponse, status_code=201)
-async def create_run(
+async def create_run(data: RunCreate, session: AsyncSession = Depends(get_session)):
-    data: RunCreate, session: AsyncSession = Depends(get_session)
-):
     # Validate game exists
     game = await session.get(Game, data.game_id)
     if game is None:
@@ -53,12 +57,9 @@ async def get_run(run_id: int, session: AsyncSession = Depends(get_session)):
         .where(NuzlockeRun.id == run_id)
         .options(
             joinedload(NuzlockeRun.game),
-            selectinload(NuzlockeRun.encounters)
+            selectinload(NuzlockeRun.encounters).joinedload(Encounter.pokemon),
-            .joinedload(Encounter.pokemon),
+            selectinload(NuzlockeRun.encounters).joinedload(Encounter.current_pokemon),
-            selectinload(NuzlockeRun.encounters)
+            selectinload(NuzlockeRun.encounters).joinedload(Encounter.route),
-            .joinedload(Encounter.current_pokemon),
-            selectinload(NuzlockeRun.encounters)
-            .joinedload(Encounter.route),
         )
     )
     run = result.scalar_one_or_none()
@@ -134,7 +135,10 @@ async def update_run(
     update_data = data.model_dump(exclude_unset=True)
 
     # Validate hof_encounter_ids if provided
-    if "hof_encounter_ids" in update_data and update_data["hof_encounter_ids"] is not None:
+    if (
+        "hof_encounter_ids" in update_data
+        and update_data["hof_encounter_ids"] is not None
+    ):
         hof_ids = update_data["hof_encounter_ids"]
         if len(hof_ids) > 6:
             raise HTTPException(
@@ -156,7 +160,8 @@ async def update_run(
                     detail=f"Encounters not found in this run: {missing}",
                 )
             not_alive = [
-                eid for eid, e in found.items()
+                eid
+                for eid, e in found.items()
                 if e.status != "caught" or e.faint_level is not None
             ]
             if not_alive:
@@ -168,13 +173,15 @@ async def update_run(
     # Auto-set completed_at when ending a run
     if "status" in update_data and update_data["status"] in ("completed", "failed"):
         if run.status != "active":
-            raise HTTPException(
+            raise HTTPException(status_code=400, detail="Only active runs can be ended")
-                status_code=400, detail="Only active runs can be ended"
+        update_data["completed_at"] = datetime.now(UTC)
-            )
-        update_data["completed_at"] = datetime.now(timezone.utc)
 
     # Block reactivating a completed/failed run that belongs to a genlocke
-    if "status" in update_data and update_data["status"] == "active" and run.status != "active":
+    if (
+        "status" in update_data
+        and update_data["status"] == "active"
+        and run.status != "active"
+    ):
         leg_result = await session.execute(
             select(GenlockeLeg).where(GenlockeLeg.run_id == run_id)
         )
@@ -215,9 +222,7 @@ async def update_run(
 
 
 @router.delete("/{run_id}", status_code=204)
-async def delete_run(
+async def delete_run(run_id: int, session: AsyncSession = Depends(get_session)):
-    run_id: int, session: AsyncSession = Depends(get_session)
-):
     run = await session.get(NuzlockeRun, run_id)
     if run is None:
         raise HTTPException(status_code=404, detail="Run not found")

backend/src/app/api/stats.py

@@ -84,8 +84,12 @@ async def get_stats(session: AsyncSession = Depends(get_session)):
     fainted_count = enc.fainted
     missed_count = enc.missed
 
-    catch_rate = round(caught_count / total_encounters, 4) if total_encounters > 0 else None
+    catch_rate = (
-    avg_encounters_per_run = round(total_encounters / total_runs, 1) if total_runs > 0 else None
+        round(caught_count / total_encounters, 4) if total_encounters > 0 else None
+    )
+    avg_encounters_per_run = (
+        round(total_encounters / total_runs, 1) if total_runs > 0 else None
+    )
 
     # --- Top caught pokemon (top 10) ---
     top_caught_q = await session.execute(
@@ -102,7 +106,9 @@ async def get_stats(session: AsyncSession = Depends(get_session)):
         .limit(10)
     )
     top_caught_pokemon = [
-        PokemonRanking(pokemon_id=r.id, name=r.name, sprite_url=r.sprite_url, count=r.count)
+        PokemonRanking(
+            pokemon_id=r.id, name=r.name, sprite_url=r.sprite_url, count=r.count
+        )
         for r in top_caught_q.all()
     ]
 
@@ -120,7 +126,9 @@ async def get_stats(session: AsyncSession = Depends(get_session)):
         .limit(10)
     )
     top_encountered_pokemon = [
-        PokemonRanking(pokemon_id=r.id, name=r.name, sprite_url=r.sprite_url, count=r.count)
+        PokemonRanking(
+            pokemon_id=r.id, name=r.name, sprite_url=r.sprite_url, count=r.count
+        )
         for r in top_enc_q.all()
     ]
 
@@ -149,8 +157,7 @@ async def get_stats(session: AsyncSession = Depends(get_session)):
         .limit(5)
     )
     top_death_causes = [
-        DeathCause(cause=r.death_cause, count=r.count)
+        DeathCause(cause=r.death_cause, count=r.count) for r in death_causes_q.all()
-        for r in death_causes_q.all()
     ]
 
     # Average levels
@@ -179,8 +186,7 @@ async def get_stats(session: AsyncSession = Depends(get_session)):
         .order_by(func.count().desc())
     )
     type_distribution = [
-        TypeCount(type=r.type_name, count=r.count)
+        TypeCount(type=r.type_name, count=r.count) for r in type_q.all()
-        for r in type_q.all()
     ]
 
     return StatsResponse(

backend/src/app/models/boss_battle.py

@@ -7,7 +7,9 @@ from app.core.database import Base
 class BossBattle(Base):
     __tablename__ = "boss_battles"
     __table_args__ = (
-        UniqueConstraint("version_group_id", "order", name="uq_boss_battles_version_group_order"),
+        UniqueConstraint(
+            "version_group_id", "order", name="uq_boss_battles_version_group_order"
+        ),
     )
 
     id: Mapped[int] = mapped_column(primary_key=True)
@@ -15,8 +17,12 @@ class BossBattle(Base):
         ForeignKey("version_groups.id"), index=True
     )
     name: Mapped[str] = mapped_column(String(100))
-    boss_type: Mapped[str] = mapped_column(String(20))  # gym_leader, elite_four, champion, rival, evil_team, other
+    boss_type: Mapped[str] = mapped_column(
-    specialty_type: Mapped[str | None] = mapped_column(String(20), default=None)  # pokemon type specialty (e.g. rock, water)
+        String(20)
+    )  # gym_leader, elite_four, champion, rival, evil_team, other
+    specialty_type: Mapped[str | None] = mapped_column(
+        String(20), default=None
+    )  # pokemon type specialty (e.g. rock, water)
     badge_name: Mapped[str | None] = mapped_column(String(100))
     badge_image_url: Mapped[str | None] = mapped_column(String(500))
     level_cap: Mapped[int] = mapped_column(SmallInteger)
@@ -28,13 +34,13 @@ class BossBattle(Base):
     section: Mapped[str | None] = mapped_column(String(100), default=None)
     sprite_url: Mapped[str | None] = mapped_column(String(500))
 
-    version_group: Mapped["VersionGroup"] = relationship(
+    version_group: Mapped["VersionGroup"] = relationship(back_populates="boss_battles")
-        back_populates="boss_battles"
-    )
     after_route: Mapped["Route | None"] = relationship()
     pokemon: Mapped[list["BossPokemon"]] = relationship(
         back_populates="boss_battle", cascade="all, delete-orphan"
     )
 
     def __repr__(self) -> str:
-        return f"<BossBattle(id={self.id}, name='{self.name}', type='{self.boss_type}')>"
+        return (
+            f"<BossBattle(id={self.id}, name='{self.name}', type='{self.boss_type}')>"
+        )

backend/src/app/models/encounter.py

@@ -21,7 +21,9 @@ class Encounter(Base):
     current_pokemon_id: Mapped[int | None] = mapped_column(
         ForeignKey("pokemon.id"), index=True
     )
-    is_shiny: Mapped[bool] = mapped_column(Boolean, default=False, server_default=text("false"))
+    is_shiny: Mapped[bool] = mapped_column(
+        Boolean, default=False, server_default=text("false")
+    )
     caught_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now()
     )

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])

backend/src/app/models/game.py

@@ -12,7 +12,9 @@ class Game(Base):
     slug: Mapped[str] = mapped_column(String(100), unique=True)
     generation: Mapped[int] = mapped_column(SmallInteger)
     region: Mapped[str] = mapped_column(String(50))
-    category: Mapped[str | None] = mapped_column(String(20))  # original, remake, enhanced, sequel, spinoff
+    category: Mapped[str | None] = mapped_column(
+        String(20)
+    )  # original, remake, enhanced, sequel, spinoff
     box_art_url: Mapped[str | None] = mapped_column(String(500))
     release_year: Mapped[int | None] = mapped_column(SmallInteger)
     color: Mapped[str | None] = mapped_column(String(7))  # Hex color e.g. #FF0000
@@ -20,9 +22,7 @@ class Game(Base):
         ForeignKey("version_groups.id"), index=True
     )
 
-    version_group: Mapped["VersionGroup | None"] = relationship(
+    version_group: Mapped["VersionGroup | None"] = relationship(back_populates="games")
-        back_populates="games"
-    )
     runs: Mapped[list["NuzlockeRun"]] = relationship(back_populates="game")
 
     def __repr__(self) -> str:

backend/src/app/models/genlocke.py

@@ -13,7 +13,9 @@ class Genlocke(Base):
 
     id: Mapped[int] = mapped_column(primary_key=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
     genlocke_rules: Mapped[dict] = mapped_column(JSONB, default=dict)
     nuzlocke_rules: Mapped[dict] = mapped_column(JSONB, default=dict)
     created_at: Mapped[datetime] = mapped_column(

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}')>"
+        )

backend/src/app/models/route.py

@@ -7,7 +7,9 @@ from app.core.database import Base
 class Route(Base):
     __tablename__ = "routes"
     __table_args__ = (
-        UniqueConstraint("version_group_id", "name", name="uq_routes_version_group_name"),
+        UniqueConstraint(
+            "version_group_id", "name", name="uq_routes_version_group_name"
+        ),
     )
 
     id: Mapped[int] = mapped_column(primary_key=True)

backend/src/app/models/route_encounter.py

@@ -8,8 +8,11 @@ class RouteEncounter(Base):
     __tablename__ = "route_encounters"
     __table_args__ = (
         UniqueConstraint(
-            "route_id", "pokemon_id", "encounter_method", "game_id",
+            "route_id",
-            name="uq_route_pokemon_method_game"
+            "pokemon_id",
+            "encounter_method",
+            "game_id",
+            name="uq_route_pokemon_method_game",
         ),
     )
 

backend/src/app/schemas/__init__.py

@@ -14,7 +14,6 @@ from app.schemas.encounter import (
     EncounterResponse,
     EncounterUpdate,
 )
-from app.schemas.genlocke import GenlockeCreate, GenlockeResponse, GenlockeLegResponse
 from app.schemas.game import (
     GameCreate,
     GameDetailResponse,
@@ -25,6 +24,7 @@ from app.schemas.game import (
     RouteResponse,
     RouteUpdate,
 )
+from app.schemas.genlocke import GenlockeCreate, GenlockeLegResponse, GenlockeResponse
 from app.schemas.pokemon import (
     BulkImportItem,
     BulkImportResult,
@@ -37,7 +37,13 @@ from app.schemas.pokemon import (
     RouteEncounterResponse,
     RouteEncounterUpdate,
 )
-from app.schemas.run import RunCreate, RunDetailResponse, RunGenlockeContext, RunResponse, RunUpdate
+from app.schemas.run import (
+    RunCreate,
+    RunDetailResponse,
+    RunGenlockeContext,
+    RunResponse,
+    RunUpdate,
+)
 
 __all__ = [
     "BossBattleCreate",

backend/src/app/seeds/inject_test_data.py

@@ -6,7 +6,7 @@ Usage:
 
 import asyncio
 import random
-from datetime import datetime, timedelta, timezone
+from datetime import UTC, datetime, timedelta
 
 from sqlalchemy import delete, select
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -16,18 +16,52 @@ from app.models.encounter import Encounter
 from app.models.evolution import Evolution
 from app.models.game import Game
 from app.models.nuzlocke_run import NuzlockeRun
-from app.models.pokemon import Pokemon
 from app.models.route import Route
 
 random.seed(42)  # reproducible data
 
 # --- Nicknames pool ---
 NICKNAMES = [
-    "Blaze", "Thunder", "Shadow", "Luna", "Spike", "Rex", "Cinder", "Misty",
+    "Blaze",
-    "Rocky", "Breeze", "Fang", "Nova", "Scout", "Atlas", "Pepper", "Storm",
+    "Thunder",
-    "Bandit", "Echo", "Maple", "Titan", "Ziggy", "Bolt", "Rusty", "Pearl",
+    "Shadow",
-    "Ivy", "Ghost", "Sunny", "Dash", "Ember", "Frost", "Jade", "Onyx",
+    "Luna",
-    "Willow", "Tank", "Pip", "Mochi", "Salem", "Patches", "Bean", "Rocket",
+    "Spike",
+    "Rex",
+    "Cinder",
+    "Misty",
+    "Rocky",
+    "Breeze",
+    "Fang",
+    "Nova",
+    "Scout",
+    "Atlas",
+    "Pepper",
+    "Storm",
+    "Bandit",
+    "Echo",
+    "Maple",
+    "Titan",
+    "Ziggy",
+    "Bolt",
+    "Rusty",
+    "Pearl",
+    "Ivy",
+    "Ghost",
+    "Sunny",
+    "Dash",
+    "Ember",
+    "Frost",
+    "Jade",
+    "Onyx",
+    "Willow",
+    "Tank",
+    "Pip",
+    "Mochi",
+    "Salem",
+    "Patches",
+    "Bean",
+    "Rocket",
 ]
 
 DEATH_CAUSES = [
@@ -129,20 +163,18 @@ async def get_leaf_routes(session: AsyncSession, game_id: int) -> list[Route]:
     """Get routes that can have encounters (no children)."""
     # Get all routes for the game
     result = await session.execute(
-        select(Route)
+        select(Route).where(Route.game_id == game_id).order_by(Route.order)
-        .where(Route.game_id == game_id)
-        .order_by(Route.order)
     )
     all_routes = result.scalars().all()
 
-    parent_ids = {r.parent_route_id for r in all_routes if r.parent_route_id is not None}
+    parent_ids = {
+        r.parent_route_id for r in all_routes if r.parent_route_id is not None
+    }
     leaf_routes = [r for r in all_routes if r.id not in parent_ids]
     return leaf_routes
 
 
-async def get_encounterables(
+async def get_encounterables(session: AsyncSession, game_id: int) -> list[int]:
-    session: AsyncSession, game_id: int
-) -> list[int]:
     """Get pokemon IDs that appear in route encounters for this game."""
     from app.models.route_encounter import RouteEncounter
 
@@ -157,16 +189,16 @@ async def get_encounterables(
 
 async def get_evolution_map(session: AsyncSession) -> dict[int, list[int]]:
     """Return {from_pokemon_id: [to_pokemon_id, ...]} for all evolutions."""
-    result = await session.execute(select(Evolution.from_pokemon_id, Evolution.to_pokemon_id))
+    result = await session.execute(
+        select(Evolution.from_pokemon_id, Evolution.to_pokemon_id)
+    )
     evo_map: dict[int, list[int]] = {}
     for from_id, to_id in result:
         evo_map.setdefault(from_id, []).append(to_id)
     return evo_map
 
 
-def pick_routes_for_run(
+def pick_routes_for_run(leaf_routes: list[Route], progress: float) -> list[Route]:
-    leaf_routes: list[Route], progress: float
-) -> list[Route]:
     """Pick a subset of leaf routes respecting one-per-group.
 
     For routes with a parent, only one sibling per parent_route_id is chosen.
@@ -257,15 +289,14 @@ async def inject():
     """Clear existing runs and inject test data."""
     print("Injecting test data...")
 
-    async with async_session() as session:
+    async with async_session() as session, session.begin():
-        async with session.begin():
         # Clear existing runs and encounters
         await session.execute(delete(Encounter))
         await session.execute(delete(NuzlockeRun))
         print("Cleared existing runs and encounters")
 
         evo_map = await get_evolution_map(session)
-            now = datetime.now(timezone.utc)
+        now = datetime.now(UTC)
 
         total_runs = 0
         total_encounters = 0

backend/src/app/seeds/loader.py

@@ -21,16 +21,19 @@ async def upsert_version_groups(
     """Upsert version group records, return {slug: id} mapping."""
     for vg_slug, vg_info in vg_data.items():
         vg_name = " / ".join(
-            g["name"].replace("Pokemon ", "")
+            g["name"].replace("Pokemon ", "") for g in vg_info["games"].values()
-            for g in vg_info["games"].values()
         )
-        stmt = insert(VersionGroup).values(
+        stmt = (
+            insert(VersionGroup)
+            .values(
                 name=vg_name,
                 slug=vg_slug,
-        ).on_conflict_do_update(
+            )
+            .on_conflict_do_update(
                 index_elements=["slug"],
                 set_={"name": vg_name},
             )
+        )
         await session.execute(stmt)
 
     await session.flush()
@@ -69,10 +72,14 @@ async def upsert_games(
                 values["version_group_id"] = vg_id
                 update_set["version_group_id"] = vg_id
 
-        stmt = insert(Game).values(**values).on_conflict_do_update(
+        stmt = (
+            insert(Game)
+            .values(**values)
+            .on_conflict_do_update(
                 index_elements=["slug"],
                 set_=update_set,
             )
+        )
         await session.execute(stmt)
 
     await session.flush()
@@ -81,16 +88,21 @@ async def upsert_games(
     return {row.slug: row.id for row in result}
 
 
-async def upsert_pokemon(session: AsyncSession, pokemon_list: list[dict]) -> dict[int, int]:
+async def upsert_pokemon(
+    session: AsyncSession, pokemon_list: list[dict]
+) -> dict[int, int]:
     """Upsert pokemon records, return {pokeapi_id: id} mapping."""
     for poke in pokemon_list:
-        stmt = insert(Pokemon).values(
+        stmt = (
+            insert(Pokemon)
+            .values(
                 pokeapi_id=poke["pokeapi_id"],
                 national_dex=poke["national_dex"],
                 name=poke["name"],
                 types=poke["types"],
                 sprite_url=poke.get("sprite_url"),
-        ).on_conflict_do_update(
+            )
+            .on_conflict_do_update(
                 index_elements=["pokeapi_id"],
                 set_={
                     "national_dex": poke["national_dex"],
@@ -99,6 +111,7 @@ async def upsert_pokemon(session: AsyncSession, pokemon_list: list[dict]) -> dic
                     "sprite_url": poke.get("sprite_url"),
                 },
             )
+        )
         await session.execute(stmt)
 
     await session.flush()
@@ -119,15 +132,19 @@ async def upsert_routes(
     """
     # First pass: upsert all parent routes (without parent_route_id)
     for route in routes:
-        stmt = insert(Route).values(
+        stmt = (
+            insert(Route)
+            .values(
                 name=route["name"],
                 version_group_id=version_group_id,
                 order=route["order"],
                 parent_route_id=None,  # Parent routes have no parent
-        ).on_conflict_do_update(
+            )
+            .on_conflict_do_update(
                 constraint="uq_routes_version_group_name",
                 set_={"order": route["order"], "parent_route_id": None},
             )
+        )
         await session.execute(stmt)
 
     await session.flush()
@@ -146,13 +163,16 @@ async def upsert_routes(
 
         parent_id = name_to_id[route["name"]]
         for child in children:
-            stmt = insert(Route).values(
+            stmt = (
+                insert(Route)
+                .values(
                     name=child["name"],
                     version_group_id=version_group_id,
                     order=child["order"],
                     parent_route_id=parent_id,
                     pinwheel_zone=child.get("pinwheel_zone"),
-            ).on_conflict_do_update(
+                )
+                .on_conflict_do_update(
                     constraint="uq_routes_version_group_name",
                     set_={
                         "order": child["order"],
@@ -160,6 +180,7 @@ async def upsert_routes(
                         "pinwheel_zone": child.get("pinwheel_zone"),
                     },
                 )
+            )
             await session.execute(stmt)
 
     await session.flush()
@@ -186,7 +207,9 @@ async def upsert_route_encounters(
             print(f"  Warning: no pokemon_id for pokeapi_id {enc['pokeapi_id']}")
             continue
 
-        stmt = insert(RouteEncounter).values(
+        stmt = (
+            insert(RouteEncounter)
+            .values(
                 route_id=route_id,
                 pokemon_id=pokemon_id,
                 game_id=game_id,
@@ -194,7 +217,8 @@ async def upsert_route_encounters(
                 encounter_rate=enc["encounter_rate"],
                 min_level=enc["min_level"],
                 max_level=enc["max_level"],
-        ).on_conflict_do_update(
+            )
+            .on_conflict_do_update(
                 constraint="uq_route_pokemon_method_game",
                 set_={
                     "encounter_rate": enc["encounter_rate"],
@@ -202,6 +226,7 @@ async def upsert_route_encounters(
                     "max_level": enc["max_level"],
                 },
             )
+        )
         await session.execute(stmt)
         count += 1
 
@@ -224,10 +249,14 @@ async def upsert_bosses(
         if after_route_name and route_name_to_id:
             after_route_id = route_name_to_id.get(after_route_name)
             if after_route_id is None:
-                print(f"  Warning: route '{after_route_name}' not found for boss '{boss['name']}'")
+                print(
+                    f"  Warning: route '{after_route_name}' not found for boss '{boss['name']}'"
+                )
 
         # Upsert the boss battle on (version_group_id, order) conflict
-        stmt = insert(BossBattle).values(
+        stmt = (
+            insert(BossBattle)
+            .values(
                 version_group_id=version_group_id,
                 name=boss["name"],
                 boss_type=boss["boss_type"],
@@ -240,7 +269,8 @@ async def upsert_bosses(
                 location=boss["location"],
                 section=boss.get("section"),
                 sprite_url=boss.get("sprite_url"),
-        ).on_conflict_do_update(
+            )
+            .on_conflict_do_update(
                 constraint="uq_boss_battles_version_group_order",
                 set_={
                     "name": boss["name"],
@@ -254,7 +284,9 @@ async def upsert_bosses(
                     "section": boss.get("section"),
                     "sprite_url": boss.get("sprite_url"),
                 },
-        ).returning(BossBattle.id)
+            )
+            .returning(BossBattle.id)
+        )
         result = await session.execute(stmt)
         boss_id = result.scalar_one()
 
@@ -267,13 +299,15 @@ async def upsert_bosses(
             if pokemon_id is None:
                 print(f"  Warning: no pokemon_id for pokeapi_id {bp['pokeapi_id']}")
                 continue
-            session.add(BossPokemon(
+            session.add(
+                BossPokemon(
                     boss_battle_id=boss_id,
                     pokemon_id=pokemon_id,
                     level=bp["level"],
                     order=bp["order"],
                     condition_label=bp.get("condition_label"),
-            ))
+                )
+            )
 
         count += 1
 

backend/src/app/seeds/run.py

@@ -42,8 +42,7 @@ async def seed():
     """Run the full seed process."""
     print("Starting seed...")
 
-    async with async_session() as session:
+    async with async_session() as session, session.begin():
-        async with session.begin():
         # 1. Upsert version groups
         with open(VG_JSON) as f:
             vg_data = json.load(f)
@@ -115,8 +114,11 @@ async def seed():
                     # Parent routes may have empty encounters
                     if route["encounters"]:
                         enc_count = await upsert_route_encounters(
-                                session, route_id, route["encounters"],
+                            session,
-                                dex_to_id, game_id,
+                            route_id,
+                            route["encounters"],
+                            dex_to_id,
+                            game_id,
                         )
                         total_encounters += enc_count
 
@@ -124,12 +126,17 @@ async def seed():
                     for child in route.get("children", []):
                         child_id = route_map.get(child["name"])
                         if child_id is None:
-                                print(f"    Warning: child route '{child['name']}' not found")
+                            print(
+                                f"    Warning: child route '{child['name']}' not found"
+                            )
                             continue
 
                         enc_count = await upsert_route_encounters(
-                                session, child_id, child["encounters"],
+                            session,
-                                dex_to_id, game_id,
+                            child_id,
+                            child["encounters"],
+                            dex_to_id,
+                            game_id,
                         )
                         total_encounters += enc_count
 
@@ -152,7 +159,9 @@ async def seed():
                 continue
 
             route_name_to_id = route_maps_by_vg.get(vg_id, {})
-                boss_count = await upsert_bosses(session, vg_id, bosses_data, dex_to_id, route_name_to_id)
+            boss_count = await upsert_bosses(
+                session, vg_id, bosses_data, dex_to_id, route_name_to_id
+            )
             total_bosses += boss_count
             print(f"  {vg_slug}: {boss_count} bosses")
 
@@ -180,7 +189,9 @@ async def verify():
         games_count = (await session.execute(select(func.count(Game.id)))).scalar()
         pokemon_count = (await session.execute(select(func.count(Pokemon.id)))).scalar()
         routes_count = (await session.execute(select(func.count(Route.id)))).scalar()
-        enc_count = (await session.execute(select(func.count(RouteEncounter.id)))).scalar()
+        enc_count = (
+            await session.execute(select(func.count(RouteEncounter.id)))
+        ).scalar()
         boss_count = (await session.execute(select(func.count(BossBattle.id)))).scalar()
 
         print(f"Version Groups: {vg_count}")
@@ -328,7 +339,7 @@ async def _export_routes(session: AsyncSession, vg_data: dict):
     games_by_slug = {g.slug: g for g in game_result.scalars().all()}
 
     exported = 0
-    for vg_slug, vg_info in vg_data.items():
+    for _vg_slug, vg_info in vg_data.items():
         for game_slug in vg_info["games"]:
             game = games_by_slug.get(game_slug)
             if game is None or game.version_group_id is None:
@@ -356,11 +367,9 @@ async def _export_routes(session: AsyncSession, vg_data: dict):
                 if r.parent_route_id is not None:
                     children_by_parent.setdefault(r.parent_route_id, []).append(r)
 
-            def format_encounters(route: Route) -> list[dict]:
+            def format_encounters(route: Route, _game: Game = game) -> list[dict]:
                 game_encounters = [
-                    enc
+                    enc for enc in route.route_encounters if enc.game_id == _game.id
-                    for enc in route.route_encounters
-                    if enc.game_id == game.id
                 ]
                 return [
                     {
@@ -384,17 +393,20 @@ async def _export_routes(session: AsyncSession, vg_data: dict):
                     data["pinwheel_zone"] = route.pinwheel_zone
                 return data
 
-            def format_route(route: Route) -> dict:
+            def format_route(
+                route: Route,
+                _children_by_parent: dict[int, list[Route]] = children_by_parent,
+            ) -> dict:
                 data: dict = {
                     "name": route.name,
                     "order": route.order,
                     "encounters": format_encounters(route),
                 }
-                children = children_by_parent.get(route.id, [])
+                children = _children_by_parent.get(route.id, [])
                 if children:
                     data["children"] = [
                         format_child(c)
-                        for c in sorted(children, key=lambda r: r.order)
+                        for c in sorted(children, key=lambda route: route.order)
                     ]
                 return data
 
@@ -444,7 +456,9 @@ def _download_image(
 
     if filename not in downloaded:
         output_dir.mkdir(parents=True, exist_ok=True)
-        req = urllib.request.Request(url, headers={"User-Agent": "nuzlocke-tracker/1.0"})
+        req = urllib.request.Request(
+            url, headers={"User-Agent": "nuzlocke-tracker/1.0"}
+        )
         try:
             with urllib.request.urlopen(req, timeout=30) as resp:
                 dest.write_bytes(resp.read())
@@ -496,16 +510,23 @@ async def _export_bosses(session: AsyncSession, vg_data: dict):
             if badge_image_url and b.badge_name:
                 badge_slug = _slugify(b.badge_name)
                 badge_image_url = _download_image(
-                    badge_image_url, badge_dir, badge_slug, downloaded_badges,
+                    badge_image_url,
+                    badge_dir,
+                    badge_slug,
+                    downloaded_badges,
                 )
 
             if sprite_url:
                 sprite_slug = _slugify(b.name)
                 sprite_url = _download_image(
-                    sprite_url, sprite_dir, sprite_slug, downloaded_sprites,
+                    sprite_url,
+                    sprite_dir,
+                    sprite_slug,
+                    downloaded_sprites,
                 )
 
-            data.append({
+            data.append(
+                {
                     "name": b.name,
                     "boss_type": b.boss_type,
                     "specialty_type": b.specialty_type,
@@ -526,7 +547,8 @@ async def _export_bosses(session: AsyncSession, vg_data: dict):
                         }
                         for bp in sorted(b.pokemon, key=lambda p: p.order)
                     ],
-            })
+                }
+            )
 
         _write_json(f"{first_game_slug}-bosses.json", data)
         exported += 1

frontend/eslint.config.js

@@ -21,5 +21,13 @@ export default defineConfig([
       ecmaVersion: 2020,
       globals: globals.browser,
     },
+    rules: {
+      'react-refresh/only-export-components': [
+        'warn',
+        { allowConstantExport: true },
+      ],
+      'react-hooks/set-state-in-effect': 'off',
+      'react-hooks/preserve-manual-memoization': 'off',
+    },
   },
 ])