feat: add unified linting scripts and git hooks for code quality enforcement

- Introduced `lint` and `lint-fix` applications in `flake.nix` for unified linting of backend (Python) and frontend (TypeScript/Svelte) code.
- Added `scripts/lint.sh` for manual linting execution.
- Created `scripts/install-hooks.sh` to set up git hooks for automatic linting before commits and optional tests before pushes.
- Updated `README.md` with instructions for using the new linting features and git hooks.

backend/app/database/models/__init__.py

@@ -1,11 +1,12 @@
 """Database models."""
-from app.database.models.user import User
+
 from app.database.models.board import Board
-from app.database.models.image import Image
 from app.database.models.board_image import BoardImage
-from app.database.models.group import Group
-from app.database.models.share_link import ShareLink
 from app.database.models.comment import Comment
+from app.database.models.group import Group
+from app.database.models.image import Image
+from app.database.models.share_link import ShareLink
+from app.database.models.user import User
 
 __all__ = [
     "User",

backend/app/database/models/board.py

@@ -1,6 +1,8 @@
 """Board model for reference boards."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Boolean, Column, DateTime, ForeignKey, String, Text
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import relationship
@@ -17,11 +19,7 @@ class Board(Base):
     user_id = Column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    viewport_state = Column(
-        JSONB,
-        nullable=False,
-        default={"x": 0, "y": 0, "zoom": 1.0, "rotation": 0}
-    )
+    viewport_state = Column(JSONB, nullable=False, default={"x": 0, "y": 0, "zoom": 1.0, "rotation": 0})
     created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
     updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)
     is_deleted = Column(Boolean, nullable=False, default=False)
@@ -35,4 +33,3 @@ class Board(Base):
 
     def __repr__(self) -> str:
         return f"<Board(id={self.id}, title={self.title})>"
-

backend/app/database/models/board_image.py

@@ -1,6 +1,8 @@
 """BoardImage junction model."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Column, DateTime, ForeignKey, Integer, UniqueConstraint
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import relationship
@@ -26,17 +28,15 @@ class BoardImage(Base):
             "opacity": 1.0,
             "flipped_h": False,
             "flipped_v": False,
-            "greyscale": False
-        }
+            "greyscale": False,
+        },
     )
     z_order = Column(Integer, nullable=False, default=0, index=True)
     group_id = Column(UUID(as_uuid=True), ForeignKey("groups.id", ondelete="SET NULL"), nullable=True, index=True)
     created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
     updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)
 
-    __table_args__ = (
-        UniqueConstraint("board_id", "image_id", name="uq_board_image"),
-    )
+    __table_args__ = (UniqueConstraint("board_id", "image_id", name="uq_board_image"),)
 
     # Relationships
     board = relationship("Board", back_populates="board_images")
@@ -45,4 +45,3 @@ class BoardImage(Base):
 
     def __repr__(self) -> str:
         return f"<BoardImage(board_id={self.board_id}, image_id={self.image_id})>"
-

backend/app/database/models/comment.py

@@ -1,6 +1,8 @@
 """Comment model for board comments."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Boolean, Column, DateTime, ForeignKey, String, Text
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import relationship
@@ -15,7 +17,9 @@ class Comment(Base):
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
     board_id = Column(UUID(as_uuid=True), ForeignKey("boards.id", ondelete="CASCADE"), nullable=False, index=True)
-    share_link_id = Column(UUID(as_uuid=True), ForeignKey("share_links.id", ondelete="SET NULL"), nullable=True, index=True)
+    share_link_id = Column(
+        UUID(as_uuid=True), ForeignKey("share_links.id", ondelete="SET NULL"), nullable=True, index=True
+    )
     author_name = Column(String(100), nullable=False)
     content = Column(Text, nullable=False)
     position = Column(JSONB, nullable=True)  # Optional canvas position
@@ -28,4 +32,3 @@ class Comment(Base):
 
     def __repr__(self) -> str:
         return f"<Comment(id={self.id}, author={self.author_name})>"
-

backend/app/database/models/group.py

@@ -1,6 +1,8 @@
 """Group model for image grouping."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Column, DateTime, ForeignKey, String, Text
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
@@ -27,4 +29,3 @@ class Group(Base):
 
     def __repr__(self) -> str:
         return f"<Group(id={self.id}, name={self.name})>"
-

backend/app/database/models/image.py

@@ -1,6 +1,8 @@
 """Image model for uploaded images."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import BigInteger, Column, DateTime, ForeignKey, Integer, String
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import relationship
@@ -31,4 +33,3 @@ class Image(Base):
 
     def __repr__(self) -> str:
         return f"<Image(id={self.id}, filename={self.filename})>"
-

backend/app/database/models/share_link.py

@@ -1,6 +1,8 @@
 """ShareLink model for board sharing."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
@@ -29,4 +31,3 @@ class ShareLink(Base):
 
     def __repr__(self) -> str:
         return f"<ShareLink(id={self.id}, token={self.token[:8]}...)>"
-

backend/app/database/models/user.py

@@ -1,6 +1,8 @@
 """User model for authentication and ownership."""
+
 import uuid
 from datetime import datetime
+
 from sqlalchemy import Boolean, Column, DateTime, String
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
@@ -26,4 +28,3 @@ class User(Base):
 
     def __repr__(self) -> str:
         return f"<User(id={self.id}, email={self.email})>"
-