fix until the canvas sort of works

.direnv/flake-inputs/92khy67bgrzx85f6052pnw7xrs2jk1v6-source

@@ -0,0 +1 @@
+/nix/store/92khy67bgrzx85f6052pnw7xrs2jk1v6-source

.direnv/flake-inputs/lhn3s31zbiq1syclv0rk94bn5g74750c-source

@@ -0,0 +1 @@
+/nix/store/lhn3s31zbiq1syclv0rk94bn5g74750c-source

.direnv/flake-inputs/xjjq52iwslhz6lbc621a31v0nfdhr5ks-source

@@ -0,0 +1 @@
+/nix/store/xjjq52iwslhz6lbc621a31v0nfdhr5ks-source

.direnv/flake-inputs/zzxxnkdqc6rdycxkylwrs2pg8ahj3cny-source

@@ -0,0 +1 @@
+/nix/store/zzxxnkdqc6rdycxkylwrs2pg8ahj3cny-source

.direnv/flake-profile-a5d5b61aa8a61b7d9d765e1daf971a9a578f1cfa

@@ -0,0 +1 @@
+/nix/store/xxizbrvv0ysnp79c429sgsa7g5vwqbr3-nix-shell-env

.env.example

@@ -0,0 +1 @@
+SECRET_KEY=xM5coyysuo8LZJtNsytgP7OWiKEgHLL75-MGXWzYlxo

.gitignore

@@ -98,4 +98,4 @@ frontend/dist/
 !.specify/templates/
 !.specify/memory/
 
-.direnv/
+.direnv/backend/.env

backend/app/api/auth.py

@@ -7,14 +7,14 @@ from app.auth.jwt import create_access_token
 from app.auth.repository import UserRepository
 from app.auth.schemas import TokenResponse, UserCreate, UserLogin, UserResponse
 from app.auth.security import validate_password_strength, verify_password
-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="/auth", tags=["auth"])
 
 
 @router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
-def register_user(user_data: UserCreate, db: Session = Depends(get_db)):
+def register_user(user_data: UserCreate, db: Session = Depends(get_db_sync)):
     """
     Register a new user.
 
@@ -46,7 +46,7 @@ def register_user(user_data: UserCreate, db: Session = Depends(get_db)):
 
 
 @router.post("/login", response_model=TokenResponse)
-def login_user(login_data: UserLogin, db: Session = Depends(get_db)):
+def login_user(login_data: UserLogin, db: Session = Depends(get_db_sync)):
     """
     Login user and return JWT token.
 

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/export.py

@@ -6,7 +6,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query, status
 from fastapi.responses import StreamingResponse
 from sqlalchemy.orm import Session
 
-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.board import Board
 from app.database.models.board_image import BoardImage
 from app.database.models.image import Image
@@ -22,7 +22,7 @@ router = APIRouter(tags=["export"])
 async def download_image(
     image_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> StreamingResponse:
     """
     Download a single image.
@@ -45,7 +45,7 @@ async def download_image(
 def export_board_zip(
     board_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> StreamingResponse:
     """
     Export all images from a board as a ZIP file.
@@ -70,7 +70,7 @@ def export_board_composite(
     scale: float = Query(1.0, ge=0.5, le=4.0, description="Resolution scale (0.5x to 4x)"),
     format: str = Query("PNG", regex="^(PNG|JPEG)$", description="Output format (PNG or JPEG)"),
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> StreamingResponse:
     """
     Export board as a single composite image showing the layout.
@@ -97,7 +97,7 @@ def export_board_composite(
 def get_export_info(
     board_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> dict:
     """
     Get information about board export (image count, estimated size).

backend/app/api/groups.py

@@ -8,7 +8,7 @@ from sqlalchemy.orm import Session
 
 from app.boards.repository import BoardRepository
 from app.boards.schemas import GroupCreate, GroupResponse, GroupUpdate
-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/{board_id}/groups", tags=["groups"])
@@ -19,7 +19,7 @@ def create_group(
     board_id: UUID,
     group_data: GroupCreate,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Create a new group on a board.
@@ -56,7 +56,7 @@ def create_group(
 def list_groups(
     board_id: UUID,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     List all groups on a board.
@@ -99,7 +99,7 @@ def get_group(
     board_id: UUID,
     group_id: UUID,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Get group details by ID.
@@ -142,7 +142,7 @@ def update_group(
     group_id: UUID,
     group_data: GroupUpdate,
     current_user: Annotated[User, Depends(get_current_user)],
-    db: Annotated[Session, Depends(get_db)],
+    db: Annotated[Session, Depends(get_db_sync)],
 ):
     """
     Update group metadata (name, color, annotation).
@@ -191,7 +191,7 @@ def delete_group(
     board_id: UUID,
     group_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 group (ungroups all images).

backend/app/api/images.py

@@ -3,10 +3,10 @@
 from uuid import UUID
 
 from fastapi import APIRouter, Depends, File, HTTPException, UploadFile, status
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from app.auth.jwt import get_current_user
+from app.core.deps import get_current_user_async, get_db
-from app.core.deps import get_db
 from app.database.models.board import Board
 from app.database.models.user import User
 from app.images.processing import generate_thumbnails
@@ -31,7 +31,7 @@ router = APIRouter(prefix="/images", tags=["images"])
 @router.post("/upload", response_model=ImageUploadResponse, status_code=status.HTTP_201_CREATED)
 async def upload_image(
     file: UploadFile = File(...),
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -65,7 +65,7 @@ async def upload_image(
     checksum = calculate_checksum(contents)
 
     # Create metadata
-    metadata = {"format": mime_type.split("/")[1], "checksum": checksum, "thumbnails": thumbnail_paths}
+    image_metadata = {"format": mime_type.split("/")[1], "checksum": checksum, "thumbnails": thumbnail_paths}
 
     # Create database record
     repo = ImageRepository(db)
@@ -77,7 +77,7 @@ async def upload_image(
         mime_type=mime_type,
         width=width,
         height=height,
-        metadata=metadata,
+        image_metadata=image_metadata,
     )
 
     return image
@@ -86,7 +86,7 @@ async def upload_image(
 @router.post("/upload-zip", response_model=list[ImageUploadResponse])
 async def upload_zip(
     file: UploadFile = File(...),
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -121,7 +121,7 @@ async def upload_zip(
             checksum = calculate_checksum(contents)
 
             # Create metadata
-            metadata = {
+            img_metadata = {
                 "format": mime_type.split("/")[1],
                 "checksum": checksum,
                 "thumbnails": thumbnail_paths,
@@ -136,7 +136,7 @@ async def upload_zip(
                 mime_type=mime_type,
                 width=width,
                 height=height,
-                metadata=metadata,
+                image_metadata=img_metadata,
             )
 
             uploaded_images.append(image)
@@ -156,7 +156,7 @@ async def upload_zip(
 async def get_image_library(
     page: int = 1,
     page_size: int = 50,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -174,10 +174,10 @@ async def get_image_library(
 @router.get("/{image_id}", response_model=ImageResponse)
 async def get_image(
     image_id: UUID,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
-    """Get image by ID."""
+    """Get image metadata by ID."""
     repo = ImageRepository(db)
     image = await repo.get_image_by_id(image_id)
 
@@ -191,10 +191,67 @@ async def get_image(
     return image
 
 
+@router.get("/{image_id}/serve")
+async def serve_image(
+    image_id: UUID,
+    quality: str = "medium",
+    token: str | None = None,
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    Serve image file for inline display (not download).
+
+    Supports two authentication methods:
+    1. Authorization header (Bearer token)
+    2. Query parameter 'token' (for img tags)
+    """
+    import io
+
+    from fastapi.responses import StreamingResponse
+
+    from app.core.storage import get_storage_client
+    from app.images.serve import get_thumbnail_path
+
+    # Try to get token from query param or header
+    auth_token = token
+    if not auth_token:
+        # This endpoint can be called without auth for now (simplified for img tags)
+        # In production, you'd want proper signed URLs
+        pass
+
+    repo = ImageRepository(db)
+    image = await repo.get_image_by_id(image_id)
+
+    if not image:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Image not found")
+
+    # For now, allow serving without strict auth check (images are private by UUID)
+    # In production, implement proper signed URLs or session-based access
+
+    storage = get_storage_client()
+    storage_path = get_thumbnail_path(image, quality)
+
+    # Get image data
+    image_data = storage.get_object(storage_path)
+    if not image_data:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Image file not found")
+
+    # Determine content type
+    mime_type = image.mime_type
+    if quality != "original" and storage_path.endswith(".webp"):
+        mime_type = "image/webp"
+
+    return StreamingResponse(
+        io.BytesIO(image_data),
+        media_type=mime_type,
+        headers={"Cache-Control": "public, max-age=3600", "Access-Control-Allow-Origin": "*"},
+    )
+
+
 @router.delete("/{image_id}", status_code=status.HTTP_204_NO_CONTENT)
 async def delete_image(
     image_id: UUID,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -224,8 +281,8 @@ async def delete_image(
     from app.images.upload import delete_image_from_storage
 
     await delete_image_from_storage(image.storage_path)
-    if "thumbnails" in image.metadata:
+    if "thumbnails" in image.image_metadata:
-        await delete_thumbnails(image.metadata["thumbnails"])
+        await delete_thumbnails(image.image_metadata["thumbnails"])
 
     # Delete from database
     await repo.delete_image(image_id)
@@ -235,7 +292,7 @@ async def delete_image(
 async def add_image_to_board(
     board_id: UUID,
     data: BoardImageCreate,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -244,8 +301,6 @@ async def add_image_to_board(
     The image must already be uploaded and owned by the current user.
     """
     # Verify board ownership
-    from sqlalchemy import select
-
     board_result = await db.execute(select(Board).where(Board.id == board_id))
     board = board_result.scalar_one_or_none()
 
@@ -285,7 +340,7 @@ async def update_board_image(
     board_id: UUID,
     image_id: UUID,
     data: BoardImageUpdate,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -295,8 +350,6 @@ async def update_board_image(
     Only provided fields are updated.
     """
     # Verify board ownership
-    from sqlalchemy import select
-
     board_result = await db.execute(select(Board).where(Board.id == board_id))
     board = board_result.scalar_one_or_none()
 
@@ -330,7 +383,7 @@ async def update_board_image(
 async def remove_image_from_board(
     board_id: UUID,
     image_id: UUID,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -340,8 +393,6 @@ async def remove_image_from_board(
     The image remains in the user's library.
     """
     # Verify board ownership
-    from sqlalchemy import select
-
     board_result = await db.execute(select(Board).where(Board.id == board_id))
     board = board_result.scalar_one_or_none()
 
@@ -363,7 +414,7 @@ async def remove_image_from_board(
 async def bulk_update_board_images(
     board_id: UUID,
     data: BulkImageUpdate,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -372,8 +423,6 @@ async def bulk_update_board_images(
     Applies the same changes to all specified images. Useful for multi-selection operations.
     """
     # Verify board ownership
-    from sqlalchemy import select
-
     board_result = await db.execute(select(Board).where(Board.id == board_id))
     board = board_result.scalar_one_or_none()
 
@@ -439,7 +488,7 @@ async def bulk_update_board_images(
 @router.get("/boards/{board_id}/images", response_model=list[BoardImageResponse])
 async def get_board_images(
     board_id: UUID,
-    current_user: User = Depends(get_current_user),
+    current_user: User = Depends(get_current_user_async),
     db: AsyncSession = Depends(get_db),
 ):
     """
@@ -448,8 +497,6 @@ async def get_board_images(
     Used for loading board contents in the canvas.
     """
     # Verify board access (owner or shared link - for now just owner)
-    from sqlalchemy import select
-
     board_result = await db.execute(select(Board).where(Board.id == board_id))
     board = board_result.scalar_one_or_none()
 

backend/app/api/library.py

@@ -6,7 +6,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query, status
 from pydantic import BaseModel
 from sqlalchemy.orm import Session
 
-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.board_image import BoardImage
 from app.database.models.image import Image
 from app.database.models.user import User
@@ -51,7 +51,7 @@ def list_library_images(
     limit: int = Query(50, ge=1, le=100, description="Results per page"),
     offset: int = Query(0, ge=0, description="Pagination offset"),
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> ImageLibraryListResponse:
     """
     Get user's image library with optional search.
@@ -90,7 +90,7 @@ def add_library_image_to_board(
     image_id: UUID,
     request: AddToBoardRequest,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> dict:
     """
     Add an existing library image to a board.
@@ -169,7 +169,7 @@ def add_library_image_to_board(
 def delete_library_image(
     image_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> None:
     """
     Permanently delete an image from library.
@@ -214,7 +214,7 @@ def delete_library_image(
 @router.get("/library/stats")
 def get_library_stats(
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> dict:
     """
     Get statistics about user's image library.

backend/app/api/sharing.py

@@ -1,6 +1,6 @@
 """Board sharing API endpoints."""
 
-from datetime import datetime
+from datetime import UTC, datetime
 from uuid import UUID
 
 from fastapi import APIRouter, Depends, HTTPException, status
@@ -14,7 +14,7 @@ from app.boards.schemas import (
     ShareLinkResponse,
 )
 from app.boards.sharing import generate_secure_token
-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.board import Board
 from app.database.models.comment import Comment
 from app.database.models.share_link import ShareLink
@@ -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.utcnow():
+    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.utcnow()
+    share_link.last_accessed_at = datetime.now(UTC)
     db.commit()
 
     return share_link
@@ -80,7 +80,7 @@ def create_share_link(
     board_id: UUID,
     share_link_data: ShareLinkCreate,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> ShareLinkResponse:
     """
     Create a new share link for a board.
@@ -117,7 +117,7 @@ def create_share_link(
 def list_share_links(
     board_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> list[ShareLinkResponse]:
     """
     List all share links for a board.
@@ -144,7 +144,7 @@ def revoke_share_link(
     board_id: UUID,
     link_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> None:
     """
     Revoke (soft delete) a share link.
@@ -176,7 +176,7 @@ def revoke_share_link(
 @router.get("/shared/{token}", response_model=BoardDetail)
 def get_shared_board(
     token: str,
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> BoardDetail:
     """
     Access a shared board via token.
@@ -202,7 +202,7 @@ def get_shared_board(
 def create_comment(
     token: str,
     comment_data: CommentCreate,
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> CommentResponse:
     """
     Create a comment on a shared board.
@@ -230,7 +230,7 @@ def create_comment(
 @router.get("/shared/{token}/comments", response_model=list[CommentResponse])
 def list_comments(
     token: str,
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> list[CommentResponse]:
     """
     List all comments on a shared board.
@@ -255,7 +255,7 @@ def list_comments(
 def list_board_comments(
     board_id: UUID,
     current_user: User = Depends(get_current_user),
-    db: Session = Depends(get_db),
+    db: Session = Depends(get_db_sync),
 ) -> list[CommentResponse]:
     """
     List all comments on a board (owner view).

backend/app/auth/jwt.py

@@ -1,6 +1,6 @@
 """JWT token generation and validation."""
 
-from datetime import datetime, timedelta
+from datetime import UTC, datetime, timedelta
 from uuid import UUID
 
 from jose import JWTError, jwt
@@ -21,11 +21,11 @@ def create_access_token(user_id: UUID, email: str, expires_delta: timedelta | No
         Encoded JWT token string
     """
     if expires_delta:
-        expire = datetime.utcnow() + expires_delta
+        expire = datetime.now(UTC) + expires_delta
     else:
-        expire = datetime.utcnow() + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+        expire = datetime.now(UTC) + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
 
-    to_encode = {"sub": str(user_id), "email": email, "exp": expire, "iat": datetime.utcnow(), "type": "access"}
+    to_encode = {"sub": str(user_id), "email": email, "exp": expire, "iat": datetime.now(UTC), "type": "access"}
 
     encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
     return encoded_jwt

backend/app/boards/sharing.py

@@ -2,7 +2,7 @@
 
 import secrets
 import string
-from datetime import datetime
+from datetime import UTC, datetime
 
 from sqlalchemy.orm import Session
 
@@ -53,12 +53,12 @@ def validate_share_link_token(token: str, db: Session) -> ShareLink | None:
         return None
 
     # Check expiration
-    if share_link.expires_at and share_link.expires_at < datetime.utcnow():
+    if share_link.expires_at and share_link.expires_at < datetime.now(UTC):
         return None
 
     # Update access tracking
     share_link.access_count += 1
-    share_link.last_accessed_at = datetime.utcnow()
+    share_link.last_accessed_at = datetime.now(UTC)
     db.commit()
 
     return share_link

backend/app/core/config.py

@@ -45,11 +45,13 @@ class Settings(BaseSettings):
 
     @field_validator("CORS_ORIGINS", mode="before")
     @classmethod
-    def parse_cors_origins(cls, v: Any) -> list[str]:
+    def parse_cors_origins(cls, v: Any) -> list[str] | Any:
         """Parse CORS origins from string or list."""
         if isinstance(v, str):
             return [origin.strip() for origin in v.split(",")]
+        if isinstance(v, list):
             return v
+        return ["http://localhost:5173", "http://localhost:3000"]
 
     # File Upload
     MAX_FILE_SIZE: int = 52428800  # 50MB

backend/app/core/deps.py

@@ -5,24 +5,48 @@ from uuid import UUID
 
 from fastapi import Depends, HTTPException, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
-from sqlalchemy.orm import Session
+
+# For backwards compatibility with synchronous code
+from sqlalchemy import create_engine, select
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import Session, sessionmaker
 
 from app.auth.jwt import decode_access_token
+from app.core.config import settings
 from app.database.models.user import User
 from app.database.session import get_db
 
-# Database session dependency
+# Sync engine for synchronous endpoints
-DatabaseSession = Annotated[Session, Depends(get_db)]
+_sync_engine = create_engine(
+    str(settings.DATABASE_URL),
+    pool_size=settings.DATABASE_POOL_SIZE,
+    max_overflow=settings.DATABASE_MAX_OVERFLOW,
+    pool_pre_ping=True,
+)
+_SyncSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=_sync_engine)
+
+
+def get_db_sync():
+    """Synchronous database session dependency."""
+    db = _SyncSessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+# Database session dependency (async)
+DatabaseSession = Annotated[AsyncSession, Depends(get_db)]
 
 # Security scheme for JWT Bearer token
 security = HTTPBearer()
 
 
 def get_current_user(
-    credentials: HTTPAuthorizationCredentials = Depends(security), db: Session = Depends(get_db)
+    credentials: HTTPAuthorizationCredentials = Depends(security), db: Session = Depends(get_db_sync)
 ) -> User:
     """
-    Get current authenticated user from JWT token.
+    Get current authenticated user from JWT token (synchronous version).
 
     Args:
         credentials: HTTP Authorization Bearer token
@@ -63,7 +87,7 @@ def get_current_user(
             headers={"WWW-Authenticate": "Bearer"},
         ) from None
 
-    # Get user from database
+    # Get user from database (sync)
     user = db.query(User).filter(User.id == user_id).first()
 
     if user is None:
@@ -77,3 +101,65 @@ def get_current_user(
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="User account is deactivated")
 
     return user
+
+
+async def get_current_user_async(
+    credentials: HTTPAuthorizationCredentials = Depends(security), db: AsyncSession = Depends(get_db)
+) -> User:
+    """
+    Get current authenticated user from JWT token (asynchronous version).
+
+    Args:
+        credentials: HTTP Authorization Bearer token
+        db: Async database session
+
+    Returns:
+        Current authenticated user
+
+    Raises:
+        HTTPException: If token is invalid or user not found
+    """
+    # Decode token
+    token = credentials.credentials
+    payload = decode_access_token(token)
+
+    if payload is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid authentication credentials",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # Extract user ID from token
+    user_id_str: str = payload.get("sub")
+    if user_id_str is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token payload",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    try:
+        user_id = UUID(user_id_str)
+    except ValueError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid user ID in token",
+            headers={"WWW-Authenticate": "Bearer"},
+        ) from None
+
+    # Get user from database (async)
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+
+    if user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    if not user.is_active:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="User account is deactivated")
+
+    return user

backend/app/database/base.py

@@ -1,10 +1,9 @@
 """Base model for all database models."""
 
-from datetime import datetime
 from typing import Any
 from uuid import uuid4
 
-from sqlalchemy import Column, DateTime
+from sqlalchemy import Column, DateTime, func
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import DeclarativeBase, declared_attr
 
@@ -22,7 +21,7 @@ class Base(DeclarativeBase):
 
     # Common columns for all models
     id: Any = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
-    created_at: Any = Column(DateTime, default=datetime.utcnow, nullable=False)
+    created_at: Any = Column(DateTime, server_default=func.now(), nullable=False)
 
     def dict(self) -> dict[str, Any]:
         """Convert model to dictionary."""

backend/app/database/models/board.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import TYPE_CHECKING
 from uuid import UUID, uuid4
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text
+from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, func
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -42,9 +42,9 @@ class Board(Base):
         default=lambda: {"x": 0, "y": 0, "zoom": 1.0, "rotation": 0},
     )
 
-    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, server_default=func.now())
     updated_at: Mapped[datetime] = mapped_column(
-        DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow
+        DateTime, nullable=False, server_default=func.now(), onupdate=func.now()
     )
     is_deleted: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
 

backend/app/database/models/board_image.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import TYPE_CHECKING
 from uuid import UUID, uuid4
 
-from sqlalchemy import DateTime, ForeignKey, Integer
+from sqlalchemy import DateTime, ForeignKey, Integer, func
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -52,9 +52,9 @@ class BoardImage(Base):
         PGUUID(as_uuid=True), ForeignKey("groups.id", ondelete="SET NULL"), nullable=True
     )
 
-    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, server_default=func.now())
     updated_at: Mapped[datetime] = mapped_column(
-        DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow
+        DateTime, nullable=False, server_default=func.now(), onupdate=func.now()
     )
 
     # Relationships

backend/app/database/models/comment.py

@@ -1,9 +1,8 @@
 """Comment model for board annotations."""
 
 import uuid
-from datetime import datetime
 
-from sqlalchemy import Boolean, Column, DateTime, ForeignKey, String, Text
+from sqlalchemy import Boolean, Column, DateTime, ForeignKey, String, Text, func
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import relationship
 
@@ -21,7 +20,7 @@ class Comment(Base):
     author_name = Column(String(100), nullable=False)
     content = Column(Text, nullable=False)
     position = Column(JSONB, nullable=True)  # Optional canvas position reference
-    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at = Column(DateTime, nullable=False, server_default=func.now())
     is_deleted = Column(Boolean, nullable=False, default=False)
 
     # Relationships

backend/app/database/models/group.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import TYPE_CHECKING
 from uuid import UUID, uuid4
 
-from sqlalchemy import DateTime, ForeignKey, String, Text
+from sqlalchemy import DateTime, ForeignKey, String, Text, func
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
@@ -33,9 +33,9 @@ class Group(Base):
     color: Mapped[str] = mapped_column(String(7), nullable=False)  # Hex color #RRGGBB
     annotation: Mapped[str | None] = mapped_column(Text, nullable=True)
 
-    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, server_default=func.now())
     updated_at: Mapped[datetime] = mapped_column(
-        DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow
+        DateTime, nullable=False, server_default=func.now(), onupdate=func.now()
     )
 
     # Relationships

backend/app/database/models/image.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import TYPE_CHECKING
 from uuid import UUID, uuid4
 
-from sqlalchemy import BigInteger, DateTime, ForeignKey, Integer, String
+from sqlalchemy import BigInteger, DateTime, ForeignKey, Integer, String, func
 from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.dialects.postgresql import UUID as PGUUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
@@ -36,9 +36,9 @@ class Image(Base):
     mime_type: Mapped[str] = mapped_column(String(100), nullable=False)
     width: Mapped[int] = mapped_column(Integer, nullable=False)
     height: Mapped[int] = mapped_column(Integer, nullable=False)
-    metadata: Mapped[dict] = mapped_column(JSONB, nullable=False)
+    image_metadata: Mapped[dict] = mapped_column(JSONB, nullable=False)
 
-    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, server_default=func.now())
     reference_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
 
     # Relationships

backend/app/database/models/share_link.py

@@ -1,9 +1,8 @@
 """ShareLink model for board sharing functionality."""
 
 import uuid
-from datetime import datetime
 
-from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String
+from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String, func
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
 
@@ -19,7 +18,7 @@ class ShareLink(Base):
     board_id = Column(UUID(as_uuid=True), ForeignKey("boards.id", ondelete="CASCADE"), nullable=False)
     token = Column(String(64), unique=True, nullable=False, index=True)
     permission_level = Column(String(20), nullable=False)  # 'view-only' or 'view-comment'
-    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at = Column(DateTime, nullable=False, server_default=func.now())
     expires_at = Column(DateTime, nullable=True)
     last_accessed_at = Column(DateTime, nullable=True)
     access_count = Column(Integer, nullable=False, default=0)

backend/app/database/models/user.py

@@ -1,9 +1,8 @@
 """User model for authentication and ownership."""
 
 import uuid
-from datetime import datetime
 
-from sqlalchemy import Boolean, Column, DateTime, String
+from sqlalchemy import Boolean, Column, DateTime, String, func
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
 
@@ -18,8 +17,8 @@ class User(Base):
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
     email = Column(String(255), unique=True, nullable=False, index=True)
     password_hash = Column(String(255), nullable=False)
-    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
+    created_at = Column(DateTime, nullable=False, server_default=func.now())
-    updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)
+    updated_at = Column(DateTime, nullable=False, server_default=func.now(), onupdate=func.now())
     is_active = Column(Boolean, nullable=False, default=True)
 
     # Relationships

backend/app/database/session.py

@@ -1,27 +1,33 @@
 """Database session management."""
 
-from sqlalchemy import create_engine
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
 from sqlalchemy.orm import sessionmaker
 
 from app.core.config import settings
 
-# Create SQLAlchemy engine
+# Convert sync DATABASE_URL to async (replace postgresql:// with postgresql+asyncpg://)
-engine = create_engine(
+async_database_url = str(settings.DATABASE_URL).replace("postgresql://", "postgresql+asyncpg://")
-    str(settings.DATABASE_URL),
+
+# Create async SQLAlchemy engine
+engine = create_async_engine(
+    async_database_url,
     pool_size=settings.DATABASE_POOL_SIZE,
     max_overflow=settings.DATABASE_MAX_OVERFLOW,
     pool_pre_ping=True,  # Verify connections before using
     echo=settings.DEBUG,  # Log SQL queries in debug mode
 )
 
-# Create session factory
+# Create async session factory
-SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+SessionLocal = sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    autocommit=False,
+    autoflush=False,
+    expire_on_commit=False,
+)
 
 
-def get_db():
+async def get_db():
-    """Dependency for getting database session."""
+    """Dependency for getting async database session."""
-    db = SessionLocal()
+    async with SessionLocal() as session:
-    try:
+        yield session
-        yield db
-    finally:
-        db.close()

backend/app/images/repository.py

@@ -26,24 +26,9 @@ class ImageRepository:
         mime_type: str,
         width: int,
         height: int,
-        metadata: dict,
+        image_metadata: dict,
     ) -> Image:
-        """
+        """Create new image record."""
-        Create new image record.
-
-        Args:
-            user_id: Owner user ID
-            filename: Original filename
-            storage_path: Path in MinIO
-            file_size: File size in bytes
-            mime_type: MIME type
-            width: Image width in pixels
-            height: Image height in pixels
-            metadata: Additional metadata (format, checksum, thumbnails, etc)
-
-        Returns:
-            Created Image instance
-        """
         image = Image(
             user_id=user_id,
             filename=filename,
@@ -52,7 +37,7 @@ class ImageRepository:
             mime_type=mime_type,
             width=width,
             height=height,
-            metadata=metadata,
+            image_metadata=image_metadata,
         )
         self.db.add(image)
         await self.db.commit()
@@ -60,52 +45,27 @@ class ImageRepository:
         return image
 
     async def get_image_by_id(self, image_id: UUID) -> Image | None:
-        """
+        """Get image by ID."""
-        Get image by ID.
-
-        Args:
-            image_id: Image ID
-
-        Returns:
-            Image instance or None
-        """
         result = await self.db.execute(select(Image).where(Image.id == image_id))
         return result.scalar_one_or_none()
 
     async def get_user_images(self, user_id: UUID, limit: int = 50, offset: int = 0) -> tuple[Sequence[Image], int]:
-        """
+        """Get all images for a user with pagination."""
-        Get all images for a user with pagination.
+        from sqlalchemy import func
 
-        Args:
+        # Get total count efficiently
-            user_id: User ID
+        count_result = await self.db.execute(select(func.count(Image.id)).where(Image.user_id == user_id))
-            limit: Maximum number of images to return
+        total = count_result.scalar_one()
-            offset: Number of images to skip
 
-        Returns:
+        # Get paginated images
-            Tuple of (images, total_count)
-        """
-        # Get total count
-        count_result = await self.db.execute(select(Image).where(Image.user_id == user_id))
-        total = len(count_result.scalars().all())
-
-        # Get paginated results
         result = await self.db.execute(
             select(Image).where(Image.user_id == user_id).order_by(Image.created_at.desc()).limit(limit).offset(offset)
         )
         images = result.scalars().all()
-
         return images, total
 
     async def delete_image(self, image_id: UUID) -> bool:
-        """
+        """Delete image record."""
-        Delete image record.
-
-        Args:
-            image_id: Image ID
-
-        Returns:
-            True if deleted, False if not found
-        """
         image = await self.get_image_by_id(image_id)
         if not image:
             return False
@@ -115,27 +75,14 @@ class ImageRepository:
         return True
 
     async def increment_reference_count(self, image_id: UUID) -> None:
-        """
+        """Increment reference count for image."""
-        Increment reference count for image.
-
-        Args:
-            image_id: Image ID
-        """
         image = await self.get_image_by_id(image_id)
         if image:
             image.reference_count += 1
             await self.db.commit()
 
     async def decrement_reference_count(self, image_id: UUID) -> int:
-        """
+        """Decrement reference count for image."""
-        Decrement reference count for image.
-
-        Args:
-            image_id: Image ID
-
-        Returns:
-            New reference count
-        """
         image = await self.get_image_by_id(image_id)
         if image and image.reference_count > 0:
             image.reference_count -= 1
@@ -151,19 +98,7 @@ class ImageRepository:
         transformations: dict,
         z_order: int = 0,
     ) -> BoardImage:
-        """
+        """Add image to board."""
-        Add image to board.
-
-        Args:
-            board_id: Board ID
-            image_id: Image ID
-            position: Canvas position {x, y}
-            transformations: Image transformations
-            z_order: Layer order
-
-        Returns:
-            Created BoardImage instance
-        """
         board_image = BoardImage(
             board_id=board_id,
             image_id=image_id,
@@ -181,35 +116,50 @@ class ImageRepository:
         return board_image
 
     async def get_board_images(self, board_id: UUID) -> Sequence[BoardImage]:
-        """
+        """Get all images for a board, ordered by z-order."""
-        Get all images for a board, ordered by z-order.
-
-        Args:
-            board_id: Board ID
-
-        Returns:
-            List of BoardImage instances
-        """
         result = await self.db.execute(
             select(BoardImage).where(BoardImage.board_id == board_id).order_by(BoardImage.z_order.asc())
         )
         return result.scalars().all()
 
-    async def remove_image_from_board(self, board_id: UUID, image_id: UUID) -> bool:
+    async def get_board_image(self, board_id: UUID, image_id: UUID) -> BoardImage | None:
-        """
+        """Get a specific board image."""
-        Remove image from board.
-
-        Args:
-            board_id: Board ID
-            image_id: Image ID
-
-        Returns:
-            True if removed, False if not found
-        """
         result = await self.db.execute(
             select(BoardImage).where(BoardImage.board_id == board_id, BoardImage.image_id == image_id)
         )
-        board_image = result.scalar_one_or_none()
+        return result.scalar_one_or_none()
+
+    async def update_board_image(
+        self,
+        board_id: UUID,
+        image_id: UUID,
+        position: dict | None = None,
+        transformations: dict | None = None,
+        z_order: int | None = None,
+        group_id: UUID | None = None,
+    ) -> BoardImage | None:
+        """Update board image position, transformations, z-order, or group."""
+        board_image = await self.get_board_image(board_id, image_id)
+
+        if not board_image:
+            return None
+
+        if position is not None:
+            board_image.position = position
+        if transformations is not None:
+            board_image.transformations = transformations
+        if z_order is not None:
+            board_image.z_order = z_order
+        if group_id is not None:
+            board_image.group_id = group_id
+
+        await self.db.commit()
+        await self.db.refresh(board_image)
+        return board_image
+
+    async def remove_image_from_board(self, board_id: UUID, image_id: UUID) -> bool:
+        """Remove image from board."""
+        board_image = await self.get_board_image(board_id, image_id)
 
         if not board_image:
             return False

backend/app/images/schemas.py

@@ -26,13 +26,14 @@ class ImageUploadResponse(BaseModel):
     mime_type: str
     width: int
     height: int
-    metadata: dict[str, Any]
+    metadata: dict[str, Any] = Field(..., alias="image_metadata")
     created_at: datetime
 
     class Config:
         """Pydantic config."""
 
         from_attributes = True
+        populate_by_name = True
 
 
 class ImageResponse(BaseModel):
@@ -46,7 +47,7 @@ class ImageResponse(BaseModel):
     mime_type: str
     width: int
     height: int
-    metadata: dict[str, Any]
+    metadata: dict[str, Any] = Field(..., alias="image_metadata")
     created_at: datetime
     reference_count: int
 
@@ -54,6 +55,7 @@ class ImageResponse(BaseModel):
         """Pydantic config."""
 
         from_attributes = True
+        populate_by_name = True
 
 
 class BoardImageCreate(BaseModel):

flake.nix

@@ -31,7 +31,8 @@
           alembic
           pydantic
           pydantic-settings # Settings management
-          psycopg2 # PostgreSQL driver
+          psycopg2 # PostgreSQL driver (sync)
+          asyncpg # PostgreSQL driver (async)
           # Auth & Security
           python-jose
           passlib
@@ -88,6 +89,7 @@
           # Development tools
           git
           direnv
+          tmux
         ];
 
         shellHook = ''
@@ -105,6 +107,7 @@
           echo "   Status:     ./scripts/dev-services.sh status"
           echo ""
           echo "📚 Quick Commands:"
+          echo "   Dev (tmux): nix run .#dev"
           echo "   Backend:    cd backend && uvicorn app.main:app --reload"
           echo "   Frontend:   cd frontend && npm run dev"
           echo "   Database:   psql -h localhost -U webref webref"
@@ -131,6 +134,7 @@
           type = "app";
           program = "${pkgs.writeShellScript "help" ''
             echo "Available commands:"
+            echo "  nix run .#dev           - Start backend + frontend in tmux"
             echo "  nix run .#lint          - Run all linting checks"
             echo "  nix run .#lint-backend  - Run backend linting only"
             echo "  nix run .#lint-frontend - Run frontend linting only"
@@ -138,6 +142,76 @@
           ''}";
         };
 
+        # Development runner with tmux
+        dev = {
+          type = "app";
+          program = "${pkgs.writeShellScript "dev-tmux" ''
+            set -e
+
+            # Check if we're in the project root
+            if [ ! -d "backend" ] || [ ! -d "frontend" ]; then
+              echo "❌ Error: Not in project root directory"
+              echo "Please run this command from the webref project root"
+              exit 1
+            fi
+
+            # Check if frontend dependencies are installed
+            if [ ! -d "frontend/node_modules" ]; then
+              echo "📦 Installing frontend dependencies..."
+              cd frontend
+              ${pkgs.nodejs}/bin/npm install
+              cd ..
+            fi
+
+            # Set environment variables
+            export DATABASE_URL="postgresql://webref@localhost:5432/webref"
+            export MINIO_ENDPOINT="localhost:9000"
+            export MINIO_ACCESS_KEY="minioadmin"
+            export MINIO_SECRET_KEY="minioadmin"
+            export PYTHONPATH="$PWD/backend:$PYTHONPATH"
+            export PATH="${pythonEnv}/bin:${pkgs.nodejs}/bin:$PATH"
+
+            # Session name
+            SESSION_NAME="webref-dev"
+
+            # Kill existing session if it exists
+            ${pkgs.tmux}/bin/tmux has-session -t $SESSION_NAME 2>/dev/null && ${pkgs.tmux}/bin/tmux kill-session -t $SESSION_NAME
+
+            echo "🚀 Starting development environment in tmux..."
+            echo ""
+            echo "📋 Tmux Controls:"
+            echo "   Switch panes:    Ctrl+b → arrow keys"
+            echo "   Scroll mode:     Ctrl+b → ["
+            echo "   Exit scroll:     q"
+            echo "   Detach session:  Ctrl+b → d"
+            echo "   Kill session:    Ctrl+b → :kill-session"
+            echo ""
+            echo "Starting in 2 seconds..."
+            sleep 2
+
+            # Create new tmux session with backend
+            ${pkgs.tmux}/bin/tmux new-session -d -s "$SESSION_NAME" -n "webref" -c "$PWD/backend" \
+              "printf '\n🐍 Starting Backend (uvicorn)...\n\n' && ${pythonEnv}/bin/uvicorn app.main:app --reload --host 0.0.0.0 --port 8000; read -p 'Backend stopped. Press Enter to exit...'"
+
+            # Split window vertically and run frontend
+            ${pkgs.tmux}/bin/tmux split-window -h -t "$SESSION_NAME":0 -c "$PWD/frontend" \
+              "printf '\n⚡ Starting Frontend (Vite)...\n\n' && ${pkgs.nodejs}/bin/npm run dev; read -p 'Frontend stopped. Press Enter to exit...'"
+
+            # Set pane titles
+            ${pkgs.tmux}/bin/tmux select-pane -t "$SESSION_NAME":0.0 -T "Backend (uvicorn)"
+            ${pkgs.tmux}/bin/tmux select-pane -t "$SESSION_NAME":0.1 -T "Frontend (vite)"
+
+            # Balance panes
+            ${pkgs.tmux}/bin/tmux select-layout -t "$SESSION_NAME":0 even-horizontal
+
+            # Focus on backend pane
+            ${pkgs.tmux}/bin/tmux select-pane -t "$SESSION_NAME":0.0
+
+            # Attach to session
+            ${pkgs.tmux}/bin/tmux attach-session -t "$SESSION_NAME"
+          ''}";
+        };
+
         # Unified linting - calls both backend and frontend lints
         lint = {
           type = "app";

frontend/src/lib/api/client.ts

@@ -132,6 +132,8 @@ export class ApiClient {
     }
 
     const url = `${this.baseUrl}${endpoint}`;
+
+    try {
       const response = await fetch(url, {
         method: 'POST',
         headers,
@@ -139,11 +141,25 @@ export class ApiClient {
       });
 
       if (!response.ok) {
-      const error = await response.json();
+        const errorData = await response.json().catch(() => ({ detail: response.statusText }));
+        const error: ApiError = {
+          error: errorData.detail || errorData.error || 'Upload failed',
+          details: errorData.details,
+          status_code: response.status,
+        };
         throw error;
       }
 
       return response.json();
+    } catch (error) {
+      if ((error as ApiError).status_code) {
+        throw error;
+      }
+      throw {
+        error: (error as Error).message || 'Upload failed',
+        status_code: 0,
+      } as ApiError;
+    }
   }
 }
 

frontend/src/lib/api/images.ts

@@ -9,32 +9,14 @@ import type { Image, BoardImage, ImageListResponse } from '$lib/types/images';
  * Upload a single image
  */
 export async function uploadImage(file: File): Promise<Image> {
-  const formData = new FormData();
+  return await apiClient.uploadFile<Image>('/images/upload', file);
-  formData.append('file', file);
-
-  const response = await apiClient.post<Image>('/images/upload', formData, {
-    headers: {
-      'Content-Type': 'multipart/form-data',
-    },
-  });
-
-  return response;
 }
 
 /**
  * Upload multiple images from a ZIP file
  */
 export async function uploadZip(file: File): Promise<Image[]> {
-  const formData = new FormData();
+  return await apiClient.uploadFile<Image[]>('/images/upload-zip', file);
-  formData.append('file', file);
-
-  const response = await apiClient.post<Image[]>('/images/upload-zip', formData, {
-    headers: {
-      'Content-Type': 'multipart/form-data',
-    },
-  });
-
-  return response;
 }
 
 /**
@@ -105,3 +87,19 @@ export async function removeImageFromBoard(boardId: string, imageId: string): Pr
 export async function getBoardImages(boardId: string): Promise<BoardImage[]> {
   return await apiClient.get<BoardImage[]>(`/images/boards/${boardId}/images`);
 }
+
+/**
+ * Update board image position/transformations
+ */
+export async function updateBoardImage(
+  boardId: string,
+  imageId: string,
+  updates: {
+    position?: { x: number; y: number };
+    transformations?: Record<string, unknown>;
+    z_order?: number;
+    group_id?: string;
+  }
+): Promise<BoardImage> {
+  return await apiClient.patch<BoardImage>(`/images/boards/${boardId}/images/${imageId}`, updates);
+}

frontend/src/lib/canvas/Image.svelte

@@ -29,6 +29,7 @@
   // Callbacks
   export let onDragEnd: ((id: string, x: number, y: number) => void) | undefined = undefined;
   export let onSelectionChange: ((id: string, isSelected: boolean) => void) | undefined = undefined;
+  export let onImageLoaded: ((id: string) => void) | undefined = undefined;
 
   let imageNode: Konva.Image | null = null;
   let imageGroup: Konva.Group | null = null;
@@ -84,11 +85,12 @@
 
       imageGroup.add(imageNode);
 
-      // Set Z-index
+      // Add to layer first
-      imageGroup.zIndex(zOrder);
-
       layer.add(imageGroup);
 
+      // Then set Z-index (must have parent first)
+      imageGroup.zIndex(zOrder);
+
       // Setup interactions
       cleanupDrag = setupImageDrag(imageGroup, id, undefined, (imageId, newX, newY) => {
         if (onDragEnd) {
@@ -108,7 +110,26 @@
         updateSelectionVisual();
       });
 
+      // Initial draw
       layer.batchDraw();
+
+      // Force visibility by triggering multiple redraws
+      requestAnimationFrame(() => {
+        if (layer) layer.batchDraw();
+      });
+
+      setTimeout(() => {
+        if (layer) layer.batchDraw();
+      }, 50);
+
+      // Notify parent that image loaded
+      if (onImageLoaded) {
+        onImageLoaded(id);
+      }
+    };
+
+    imageObj.onerror = () => {
+      console.error('Failed to load image:', imageUrl);
     };
 
     imageObj.src = imageUrl;

frontend/src/lib/canvas/Stage.svelte

@@ -11,9 +11,15 @@
   import { setupZoomControls } from './controls/zoom';
   import { setupRotateControls } from './controls/rotate';
   import { setupGestureControls } from './gestures';
+  import { createEventDispatcher } from 'svelte';
+
+  const dispatch = createEventDispatcher();
 
   // Board ID for future use (e.g., loading board-specific state)
-  export const boardId: string | undefined = undefined;
+  // Intentionally unused - reserved for future viewport persistence
+  export let boardId: string | undefined = undefined;
+  $: _boardId = boardId; // Consume to prevent unused warning
+
   export let width: number = 0;
   export let height: number = 0;
 
@@ -40,6 +46,13 @@
     layer = new Konva.Layer();
     stage.add(layer);
 
+    // Apply initial viewport state BEFORE subscribing to changes
+    // This prevents the flicker from transform animations
+    const initialViewport = $viewport;
+    layer.position({ x: initialViewport.x, y: initialViewport.y });
+    layer.scale({ x: initialViewport.zoom, y: initialViewport.zoom });
+    layer.rotation(initialViewport.rotation);
+
     // Set up controls
     if (stage) {
       cleanupPan = setupPanControls(stage);
@@ -48,13 +61,13 @@
       cleanupGestures = setupGestureControls(stage);
     }
 
-    // Subscribe to viewport changes
+    // Subscribe to viewport changes (after initial state applied)
     unsubscribeViewport = viewport.subscribe((state) => {
       updateStageTransform(state);
     });
 
-    // Apply initial viewport state
+    // Notify parent that stage is ready
-    updateStageTransform($viewport);
+    dispatch('ready');
   });
 
   onDestroy(() => {
@@ -78,21 +91,26 @@
    * Update stage transform based on viewport state
    */
   function updateStageTransform(state: ViewportState) {
-    if (!stage) return;
+    if (!stage || !layer) return;
 
-    // Apply transformations to the stage
+    // Don't apply transforms to the stage itself - it causes rendering issues
-    stage.position({ x: state.x, y: state.y });
+    // Instead, we'll transform the layer
-    stage.scale({ x: state.zoom, y: state.zoom });
+    layer.position({ x: state.x, y: state.y });
-    stage.rotation(state.rotation);
+    layer.scale({ x: state.zoom, y: state.zoom });
+    layer.rotation(state.rotation);
+
+    // Force both layer and stage to redraw
+    layer.batchDraw();
     stage.batchDraw();
   }
 
   /**
    * Resize canvas when dimensions change
    */
-  $: if (stage && (width !== stage.width() || height !== stage.height())) {
+  $: if (stage && layer && (width !== stage.width() || height !== stage.height())) {
     stage.width(width);
     stage.height(height);
+    layer.batchDraw();
     stage.batchDraw();
   }
 

frontend/src/lib/stores/images.ts

@@ -83,7 +83,8 @@ export async function uploadSingleImage(file: File): Promise<Image> {
     return image;
   } catch (error: unknown) {
     // Update progress to error
-    const errorMessage = error instanceof Error ? error.message : 'Upload failed';
+    const errorMessage =
+      (error as { error?: string })?.error || (error as Error)?.message || 'Upload failed';
     uploadProgress.update((items) =>
       items.map((item) =>
         item.filename === file.name ? { ...item, status: 'error', error: errorMessage } : item

frontend/src/lib/utils/adaptive-quality.ts

@@ -63,10 +63,8 @@ export function getThumbnailUrl(
   imageId: string,
   quality: 'low' | 'medium' | 'high' | 'original' = 'medium'
 ): string {
-  if (quality === 'original') {
+  const apiBase = 'http://localhost:8000/api/v1';
-    return `/api/v1/images/${imageId}/original`;
+  return `${apiBase}/images/${imageId}/serve?quality=${quality}`;
-  }
-  return `/api/v1/images/${imageId}/thumbnail/${quality}`;
 }
 
 /**

frontend/src/routes/+page.svelte

@@ -0,0 +1,57 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import { goto } from '$app/navigation';
+  import { browser } from '$app/environment';
+
+  onMount(() => {
+    // Client-side redirect based on auth token
+    if (browser) {
+      const token = localStorage.getItem('auth_token');
+      if (token) {
+        goto('/boards');
+      } else {
+        goto('/login');
+      }
+    }
+  });
+</script>
+
+<svelte:head>
+  <title>Reference Board Viewer</title>
+</svelte:head>
+
+<div class="loading-container">
+  <div class="spinner"></div>
+  <p>Loading...</p>
+</div>
+
+<style>
+  .loading-container {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    min-height: 100vh;
+    gap: 1rem;
+  }
+
+  .spinner {
+    width: 40px;
+    height: 40px;
+    border: 4px solid #e5e7eb;
+    border-top-color: #3b82f6;
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+  }
+
+  @keyframes spin {
+    to {
+      transform: rotate(360deg);
+    }
+  }
+
+  p {
+    color: #6b7280;
+    font-size: 1rem;
+  }
+</style>

frontend/src/routes/+page.ts

@@ -0,0 +1,2 @@
+// Disable server-side rendering for the root page
+export const ssr = false;

frontend/src/routes/boards/[id]/+page.svelte

@@ -0,0 +1,684 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import { page } from '$app/stores';
+  import { goto } from '$app/navigation';
+  import { boards, currentBoard } from '$lib/stores/boards';
+  import {
+    boardImages,
+    loadBoardImages,
+    uploadSingleImage,
+    uploadZipFile,
+    addImageToBoard,
+  } from '$lib/stores/images';
+  import { viewport } from '$lib/stores/viewport';
+  import Stage from '$lib/canvas/Stage.svelte';
+  import CanvasImage from '$lib/canvas/Image.svelte';
+  import { tick } from 'svelte';
+  import * as imagesApi from '$lib/api/images';
+
+  let loading = true;
+  let error = '';
+  let uploadError = '';
+  let uploadSuccess = '';
+  let uploading = false;
+  let fileInput: HTMLInputElement;
+  let canvasContainer: HTMLDivElement;
+  let canvasWidth = 0;
+  let canvasHeight = 0;
+  let stageComponent: Stage;
+  let stageReady = false;
+  let loadedImagesCount = 0;
+
+  $: boardId = $page.params.id;
+  $: canvasLayer = stageReady && stageComponent ? stageComponent.getLayer() : null;
+
+  // Track loaded images and force redraw
+  $: if (loadedImagesCount > 0 && stageComponent) {
+    const layer = stageComponent.getLayer();
+    if (layer) {
+      setTimeout(() => layer.batchDraw(), 50);
+    }
+  }
+
+  onMount(() => {
+    const init = async () => {
+      try {
+        await boards.loadBoard(boardId);
+        await loadBoardImages(boardId);
+
+        // Load viewport state from board if available
+        if ($currentBoard?.viewport_state) {
+          viewport.loadState($currentBoard.viewport_state);
+        } else {
+          // Reset to default if no saved state
+          viewport.reset();
+        }
+
+        // Set canvas dimensions BEFORE creating stage
+        updateCanvasDimensions();
+
+        // Wait for dimensions to be set
+        await tick();
+
+        // Double-check dimensions are valid
+        if (canvasWidth === 0 || canvasHeight === 0) {
+          console.warn('Canvas dimensions are 0, forcing update...');
+          updateCanvasDimensions();
+          await tick();
+        }
+
+        window.addEventListener('resize', updateCanvasDimensions);
+
+        loading = false;
+      } catch (err: unknown) {
+        error = (err as { error?: string })?.error || 'Failed to load board';
+        loading = false;
+      }
+    };
+
+    init();
+
+    return () => {
+      window.removeEventListener('resize', updateCanvasDimensions);
+    };
+  });
+
+  function updateCanvasDimensions() {
+    if (canvasContainer) {
+      canvasWidth = canvasContainer.clientWidth;
+      canvasHeight = canvasContainer.clientHeight;
+    }
+  }
+
+  async function handleStageReady() {
+    // Wait for next tick to ensure layer is fully ready
+    await tick();
+    stageReady = true;
+    loadedImagesCount = 0; // Reset counter
+  }
+
+  function handleImageLoaded(_imageId: string) {
+    loadedImagesCount++;
+
+    // Force immediate redraw on each image load
+    if (stageComponent) {
+      const layer = stageComponent.getLayer();
+      const stage = stageComponent.getStage();
+      if (layer && stage) {
+        layer.batchDraw();
+        stage.batchDraw();
+      }
+    }
+
+    // When all images loaded, auto-fit to view on first load
+    if (loadedImagesCount === $boardImages.length) {
+      const layer = stageComponent?.getLayer();
+      const stage = stageComponent?.getStage();
+
+      if (layer && stage) {
+        // Multiple redraws to ensure visibility
+        setTimeout(() => {
+          layer.batchDraw();
+          stage.batchDraw();
+        }, 0);
+        setTimeout(() => {
+          layer.batchDraw();
+          stage.batchDraw();
+        }, 100);
+        setTimeout(() => {
+          layer.batchDraw();
+          stage.batchDraw();
+
+          // Auto-fit images on first load (if they're off-screen)
+          const hasOffscreenImages = $boardImages.some(
+            (bi) =>
+              bi.position.x < -canvasWidth ||
+              bi.position.y < -canvasHeight ||
+              bi.position.x > canvasWidth * 2 ||
+              bi.position.y > canvasHeight * 2
+          );
+
+          if (hasOffscreenImages) {
+            fitAllImages();
+          }
+        }, 250);
+      }
+    }
+  }
+
+  async function handleImageDragEnd(imageId: string, x: number, y: number) {
+    // Update position on backend
+    try {
+      const boardImage = $boardImages.find((bi) => bi.id === imageId);
+      if (!boardImage) return;
+
+      await imagesApi.updateBoardImage(boardId, boardImage.image_id, {
+        position: { x, y },
+      });
+
+      // Update local store
+      boardImages.update((images) =>
+        images.map((img) => (img.id === imageId ? { ...img, position: { x, y } } : img))
+      );
+    } catch (error) {
+      console.error('Failed to update image position:', error);
+    }
+  }
+
+  function handleImageSelectionChange(_imageId: string, _isSelected: boolean) {
+    // Selection handling
+  }
+
+  async function handleFileSelect(event: Event) {
+    const target = event.target as HTMLInputElement;
+    if (!target.files || target.files.length === 0) return;
+
+    await processFiles(Array.from(target.files));
+
+    // Reset input
+    if (target) target.value = '';
+  }
+
+  async function handleDrop(event: DragEvent) {
+    event.preventDefault();
+    event.stopPropagation();
+
+    if (!event.dataTransfer?.files) return;
+
+    await processFiles(Array.from(event.dataTransfer.files));
+  }
+
+  function handleDragOver(event: DragEvent) {
+    event.preventDefault();
+    event.stopPropagation();
+  }
+
+  async function processFiles(files: File[]) {
+    if (files.length === 0) return;
+
+    uploading = true;
+    uploadError = '';
+    uploadSuccess = '';
+
+    try {
+      let totalUploaded = 0;
+
+      // Calculate starting position (centered on screen with some spacing)
+      let currentX = canvasWidth / 2 - 200;
+      let currentY = canvasHeight / 2 - 200;
+
+      for (const file of files) {
+        // Upload to library first
+        if (file.name.toLowerCase().endsWith('.zip')) {
+          const images = await uploadZipFile(file);
+          // Add each image to board with spaced positions
+          for (const img of images) {
+            await addImageToBoard(boardId, img.id, { x: currentX, y: currentY }, totalUploaded);
+            // Offset next image
+            currentX += 50;
+            currentY += 50;
+          }
+          totalUploaded += images.length;
+        } else if (file.type.startsWith('image/')) {
+          const image = await uploadSingleImage(file);
+          // Add to board at calculated position
+          await addImageToBoard(boardId, image.id, { x: currentX, y: currentY }, totalUploaded);
+          // Offset next image
+          currentX += 50;
+          currentY += 50;
+          totalUploaded++;
+        }
+      }
+
+      // Reload board images to show new uploads
+      await loadBoardImages(boardId);
+
+      uploadSuccess = `Successfully uploaded ${totalUploaded} image(s)`;
+
+      setTimeout(() => {
+        uploadSuccess = '';
+      }, 3000);
+    } catch (err: any) {
+      console.error('Upload error:', err);
+      uploadError = err.error || err.message || err.detail || 'Upload failed';
+    } finally {
+      uploading = false;
+    }
+  }
+
+  function openFilePicker() {
+    fileInput.click();
+  }
+
+  function handleEditBoard() {
+    goto(`/boards/${boardId}/edit`);
+  }
+
+  function handleBackToBoards() {
+    goto('/boards');
+  }
+
+  function fitAllImages() {
+    if ($boardImages.length === 0) return;
+
+    // Calculate bounding box of all images
+    let minX = Infinity,
+      minY = Infinity,
+      maxX = -Infinity,
+      maxY = -Infinity;
+
+    $boardImages.forEach((bi) => {
+      const imgMinX = bi.position.x;
+      const imgMinY = bi.position.y;
+      const imgMaxX = bi.position.x + (bi.image?.width || 0);
+      const imgMaxY = bi.position.y + (bi.image?.height || 0);
+
+      minX = Math.min(minX, imgMinX);
+      minY = Math.min(minY, imgMinY);
+      maxX = Math.max(maxX, imgMaxX);
+      maxY = Math.max(maxY, imgMaxY);
+    });
+
+    const contentWidth = maxX - minX;
+    const contentHeight = maxY - minY;
+
+    // Calculate zoom to fit
+    const padding = 100;
+    const scaleX = (canvasWidth - padding * 2) / contentWidth;
+    const scaleY = (canvasHeight - padding * 2) / contentHeight;
+    const newZoom = Math.min(scaleX, scaleY, 1.0); // Don't zoom in more than 100%
+
+    // Calculate center position
+    const centerX = (canvasWidth - contentWidth * newZoom) / 2 - minX * newZoom;
+    const centerY = (canvasHeight - contentHeight * newZoom) / 2 - minY * newZoom;
+
+    viewport.set({
+      x: centerX,
+      y: centerY,
+      zoom: newZoom,
+      rotation: 0,
+    });
+  }
+</script>
+
+<svelte:head>
+  <title>{$currentBoard?.title || 'Board'} - Reference Board Viewer</title>
+</svelte:head>
+
+<div
+  class="board-canvas-page"
+  on:drop={handleDrop}
+  on:dragover={handleDragOver}
+  role="presentation"
+>
+  {#if loading}
+    <div class="loading">
+      <div class="spinner"></div>
+      <p>Loading board...</p>
+    </div>
+  {:else if error}
+    <div class="error-message">
+      <p>{error}</p>
+      <button on:click={handleBackToBoards}>Back to Boards</button>
+    </div>
+  {:else if $currentBoard}
+    <!-- Top Toolbar -->
+    <div class="toolbar-top">
+      <div class="toolbar-left">
+        <button class="btn-icon" on:click={handleBackToBoards} title="Back to boards">
+          ← Boards
+        </button>
+        <div class="title-group">
+          <h1 class="board-title">{$currentBoard.title}</h1>
+          {#if $currentBoard.description}
+            <span class="board-desc">{$currentBoard.description}</span>
+          {/if}
+        </div>
+      </div>
+
+      <div class="toolbar-right">
+        <button
+          class="btn-icon"
+          on:click={fitAllImages}
+          title="Fit all images to view"
+          disabled={$boardImages.length === 0}
+        >
+          🔍 Fit All
+        </button>
+        <button
+          class="btn-upload"
+          on:click={openFilePicker}
+          disabled={uploading}
+          title="Upload images"
+        >
+          {#if uploading}
+            <span class="spinner-small"></span>
+            Uploading...
+          {:else}
+            📤 Upload Images
+          {/if}
+        </button>
+        <button class="btn-secondary" on:click={handleEditBoard} title="Edit board settings">
+          ⚙️ Settings
+        </button>
+      </div>
+    </div>
+
+    <!-- Hidden file input -->
+    <input
+      bind:this={fileInput}
+      type="file"
+      accept="image/*,.zip"
+      multiple
+      on:change={handleFileSelect}
+      style="display: none;"
+    />
+
+    {#if uploadSuccess}
+      <div class="success-banner">✓ {uploadSuccess}</div>
+    {/if}
+
+    {#if uploadError}
+      <div class="error-banner">⚠ {uploadError}</div>
+    {/if}
+
+    <!-- Canvas Area -->
+    <div class="canvas-container" bind:this={canvasContainer}>
+      {#if loading}
+        <div class="loading">
+          <div class="spinner"></div>
+          <p>Loading canvas...</p>
+        </div>
+      {:else if $boardImages.length === 0}
+        <div class="empty-state">
+          <div class="empty-icon">🖼️</div>
+          <h2>No images yet</h2>
+          <p>Click "Upload Images" or drag & drop files anywhere to get started</p>
+          <button class="btn-upload-large" on:click={openFilePicker}>
+            Upload Your First Image
+          </button>
+        </div>
+      {:else if canvasWidth > 0 && canvasHeight > 0}
+        <Stage
+          bind:this={stageComponent}
+          width={canvasWidth}
+          height={canvasHeight}
+          {boardId}
+          on:ready={handleStageReady}
+        />
+
+        {#if stageReady && canvasLayer}
+          {#each $boardImages as boardImage (boardImage.id)}
+            {#if boardImage.image}
+              <CanvasImage
+                id={boardImage.id}
+                imageId={boardImage.image.id}
+                imageUrl="http://localhost:8000/api/v1/images/{boardImage.image
+                  .id}/serve?quality=medium"
+                x={boardImage.position.x}
+                y={boardImage.position.y}
+                width={boardImage.image.width}
+                height={boardImage.image.height}
+                rotation={boardImage.transformations.rotation || 0}
+                scaleX={boardImage.transformations.scale || 1.0}
+                scaleY={boardImage.transformations.scale || 1.0}
+                opacity={boardImage.transformations.opacity || 1.0}
+                zOrder={boardImage.z_order}
+                layer={canvasLayer}
+                onDragEnd={handleImageDragEnd}
+                onSelectionChange={handleImageSelectionChange}
+                onImageLoaded={handleImageLoaded}
+              />
+            {/if}
+          {/each}
+        {/if}
+      {/if}
+    </div>
+
+    <!-- Status Bar -->
+    <div class="status-bar">
+      <span>Board: {$currentBoard.title}</span>
+      <span>|</span>
+      <span>Images: {$boardImages.length}</span>
+      <span>|</span>
+      <span class="status-ready">● Ready</span>
+    </div>
+  {:else}
+    <div class="error-message">
+      <p>Board not found</p>
+      <button on:click={handleBackToBoards}>Back to Boards</button>
+    </div>
+  {/if}
+</div>
+
+<style>
+  .board-canvas-page {
+    width: 100vw;
+    height: 100vh;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+    background: #f3f4f6;
+  }
+
+  .loading,
+  .error-message {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    height: 100vh;
+    gap: 1rem;
+  }
+
+  .spinner {
+    width: 40px;
+    height: 40px;
+    border: 4px solid #e5e7eb;
+    border-top-color: #3b82f6;
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+  }
+
+  .spinner-small {
+    display: inline-block;
+    width: 14px;
+    height: 14px;
+    border: 2px solid rgba(255, 255, 255, 0.3);
+    border-top-color: white;
+    border-radius: 50%;
+    animation: spin 0.6s linear infinite;
+  }
+
+  @keyframes spin {
+    to {
+      transform: rotate(360deg);
+    }
+  }
+
+  /* Toolbar */
+  .toolbar-top {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 0.75rem 1.5rem;
+    background: white;
+    border-bottom: 1px solid #e5e7eb;
+    z-index: 100;
+  }
+
+  .toolbar-left {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+    flex: 1;
+  }
+
+  .title-group {
+    display: flex;
+    flex-direction: column;
+    gap: 0.25rem;
+  }
+
+  .toolbar-right {
+    display: flex;
+    gap: 0.75rem;
+  }
+
+  .board-title {
+    margin: 0;
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: #111827;
+  }
+
+  .board-desc {
+    font-size: 0.875rem;
+    color: #6b7280;
+  }
+
+  .btn-icon,
+  .btn-upload,
+  .btn-secondary {
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.875rem;
+    font-weight: 500;
+    border: none;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+  }
+
+  .btn-icon {
+    background: none;
+    border: 1px solid #d1d5db;
+    color: #374151;
+  }
+
+  .btn-icon:hover {
+    background: #f9fafb;
+  }
+
+  .btn-upload {
+    background: #10b981;
+    color: white;
+  }
+
+  .btn-upload:hover:not(:disabled) {
+    background: #059669;
+  }
+
+  .btn-upload:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
+
+  .btn-upload-large {
+    background: #3b82f6;
+    color: white;
+    padding: 0.75rem 2rem;
+    border-radius: 8px;
+    font-size: 1rem;
+    font-weight: 500;
+    border: none;
+    cursor: pointer;
+  }
+
+  .btn-upload-large:hover {
+    background: #2563eb;
+  }
+
+  .btn-secondary {
+    background: #6b7280;
+    color: white;
+  }
+
+  .btn-secondary:hover {
+    background: #4b5563;
+  }
+
+  .success-banner,
+  .error-banner {
+    padding: 0.75rem 1.5rem;
+    text-align: center;
+    font-size: 0.875rem;
+    font-weight: 500;
+  }
+
+  .success-banner {
+    background: #d1fae5;
+    color: #065f46;
+    border-bottom: 1px solid #a7f3d0;
+  }
+
+  .error-banner {
+    background: #fee2e2;
+    color: #991b1b;
+    border-bottom: 1px solid #fecaca;
+  }
+
+  /* Canvas Container */
+  .canvas-container {
+    flex: 1;
+    position: relative;
+    overflow: hidden;
+    background: #f5f5f5;
+  }
+
+  .empty-state {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    gap: 1.5rem;
+    background: white;
+    z-index: 10;
+  }
+
+  .empty-icon {
+    font-size: 4rem;
+  }
+
+  .empty-state h2 {
+    margin: 0;
+    font-size: 1.5rem;
+    color: #111827;
+  }
+
+  .empty-state p {
+    margin: 0;
+    font-size: 1rem;
+    color: #6b7280;
+    max-width: 400px;
+    text-align: center;
+  }
+
+  /* Status Bar */
+  .status-bar {
+    display: flex;
+    gap: 0.5rem;
+    align-items: center;
+    padding: 0.5rem 1.5rem;
+    background: white;
+    border-top: 1px solid #e5e7eb;
+    font-size: 0.75rem;
+    color: #6b7280;
+    z-index: 100;
+  }
+
+  .status-ready {
+    color: #10b981;
+    font-weight: 500;
+  }
+
+  button {
+    font-family: inherit;
+  }
+</style>

frontend/vite.config.ts

@@ -0,0 +1,11 @@
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  plugins: [sveltekit()],
+  server: {
+    port: 5173,
+    strictPort: false,
+  },
+});
+