fix part 3

backend/app/api/boards.py

@@ -8,7 +8,7 @@ from sqlalchemy.orm import Session
 
 from app.boards.repository import BoardRepository
 from app.boards.schemas import BoardCreate, BoardDetail, BoardSummary, BoardUpdate, ViewportStateUpdate
-from app.core.deps import get_current_user, get_db
+from app.core.deps import get_current_user, get_db_sync
 from app.database.models.user import User
 
 router = APIRouter(prefix="/boards", tags=["boards"])
@@ -18,7 +18,7 @@ router = APIRouter(prefix="/boards", tags=["boards"])
 def create_board(
     board_data: BoardCreate,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Create a new board.
@@ -45,7 +45,7 @@ def create_board(
 @router.get("", response_model=dict)
 def list_boards(
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
     limit: Annotated[int, Query(ge=1, le=100)] = 50,
     offset: Annotated[int, Query(ge=0)] = 0,
 ):
@@ -77,7 +77,7 @@ def list_boards(
 def get_board(
     board_id: UUID,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Get board details by ID.
@@ -111,7 +111,7 @@ def update_board(
     board_id: UUID,
     board_data: BoardUpdate,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Update board metadata.
@@ -157,7 +157,7 @@ def update_viewport(
     board_id: UUID,
     viewport_data: ViewportStateUpdate,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Update board viewport state only (optimized for frequent updates).
@@ -198,7 +198,7 @@ def update_viewport(
 def delete_board(
     board_id: UUID,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Delete a board (soft delete).

backend/app/api/sharing.py

@@ -1,6 +1,6 @@
 """Board sharing API endpoints."""
 
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from uuid import UUID
 
 from fastapi import APIRouter, Depends, HTTPException, status
@@ -54,7 +54,7 @@ def validate_share_link(token: str, db: Session, required_permission: str = "vie
         )
 
     # Check expiration
-    if share_link.expires_at and share_link.expires_at < datetime.now(timezone.utc):
+    if share_link.expires_at and share_link.expires_at < datetime.now(UTC):
         raise HTTPException(
             status_code=status.HTTP_403_FORBIDDEN,
             detail="Share link has expired",
@@ -69,7 +69,7 @@ def validate_share_link(token: str, db: Session, required_permission: str = "vie
 
     # Update access tracking
     share_link.access_count += 1
-    share_link.last_accessed_at = datetime.now(timezone.utc)
+    share_link.last_accessed_at = datetime.now(UTC)
     db.commit()
 
     return share_link