Add shot/asset typing and owned task types to departments

Departments now carry a type (shot or asset) and own a list of task
types (e.g. Animation: blocking/primary_pass/second_pass, Composite:
first_pass/second_pass, plus a new Simulation department), additive to
the existing flat Custom Task Type system. When a task's type belongs
to a department, its department is derived and kept in sync server-side
across create/update paths; Task Type is now editable in the Task
Detail panel and Department options are filtered to the task's
shot/asset scope.

backend/routers/assets.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, status
 from sqlalchemy.orm import Session
-from typing import List, Dict
+from typing import List, Dict, Optional
 
 from database import get_db
 from models.asset import Asset, AssetCategory
@@ -10,6 +10,7 @@ from models.user import User, UserRole
 from schemas.asset import AssetCreate, AssetUpdate, AssetResponse, AssetListResponse, TaskStatusInfo
 from schemas.task import TaskCreate
 from utils.auth import get_current_user_from_token, require_permission
+from utils.departments import find_owning_department
 from services.asset_soft_deletion import AssetSoftDeletionService
 
 router = APIRouter()
@@ -119,14 +120,14 @@ def get_all_asset_task_types(project_id: int, db: Session) -> List[str]:
     return STANDARD_ASSET_TASK_TYPES + custom_types
 
 
-def create_default_tasks_for_asset(asset: Asset, task_types: List[str], db: Session) -> List[Task]:
+def create_default_tasks_for_asset(asset: Asset, task_types: List[str], db: Session, project: Optional[Project] = None) -> List[Task]:
     """Create default tasks for an asset."""
     created_tasks = []
-    
+
     for task_type in task_types:
         # Create task name based on type
         task_name = f"{asset.name} - {task_type.title()}"
-        
+
         # Create the task
         db_task = Task(
             project_id=asset.project_id,
@@ -134,12 +135,13 @@ def create_default_tasks_for_asset(asset: Asset, task_types: List[str], db: Sess
             task_type=task_type,
             name=task_name,
             description=f"Default {task_type} task for {asset.name}",
-            status="not_started"
+            status="not_started",
+            department=find_owning_department(project, task_type) if project else None
         )
-        
+
         db.add(db_task)
         created_tasks.append(db_task)
-    
+
     return created_tasks
 
 
@@ -362,7 +364,7 @@ async def create_asset(
 ):
     """Create a new asset in a project with optional default tasks"""
     # Check project access
-    check_project_access(project_id, current_user, db)
+    project = check_project_access(project_id, current_user, db)
     
     # Check if asset name already exists in project (exclude soft deleted)
     existing_asset = db.query(Asset).filter(
@@ -408,7 +410,7 @@ async def create_asset(
             task_types = get_default_asset_task_types(asset.category)
         
         # Create the tasks
-        created_tasks = create_default_tasks_for_asset(db_asset, task_types, db)
+        created_tasks = create_default_tasks_for_asset(db_asset, task_types, db, project)
         task_count = len(created_tasks)
     
     db.commit()
@@ -553,13 +555,15 @@ async def create_asset_task(
     
     # Create the task
     task_name = f"{asset.name} - {task_type.title()}"
+    project = db.query(Project).filter(Project.id == asset.project_id).first()
     db_task = Task(
         project_id=asset.project_id,
         asset_id=asset.id,
         task_type=task_type,
         name=task_name,
         description=f"{task_type.title()} task for {asset.name}",
-        status="not_started"
+        status="not_started",
+        department=find_owning_department(project, task_type)
     )
     
     db.add(db_task)