Add per-project Department management

Departments are now a customizable per-project list (standard + custom),
matching the existing custom task type/status pattern, instead of a fixed
7-value enum. They're usable directly on tasks (new field, independent of
assignee) and continue to drive team member department roles.

backend/schemas/department.py

@@ -0,0 +1,50 @@
+"""
+Pydantic schemas for department management
+"""
+from pydantic import BaseModel, Field, validator
+from typing import List
+import re
+
+
+class CustomDepartmentCreate(BaseModel):
+    """Schema for creating a new custom department"""
+    department: str = Field(..., min_length=2, max_length=50, description="Department name")
+
+    @validator('department')
+    def validate_department_name(cls, v):
+        """Validate department name format"""
+        if not re.match(r'^[a-z0-9_]{2,50}$', v):
+            raise ValueError(
+                'Department name must be 2-50 characters, lowercase alphanumeric with underscores only'
+            )
+        return v
+
+
+class CustomDepartmentUpdate(BaseModel):
+    """Schema for updating a custom department name"""
+    old_name: str = Field(..., description="Current department name")
+    new_name: str = Field(..., min_length=2, max_length=50, description="New department name")
+
+    @validator('new_name')
+    def validate_department_name(cls, v):
+        """Validate department name format"""
+        if not re.match(r'^[a-z0-9_]{2,50}$', v):
+            raise ValueError(
+                'Department name must be 2-50 characters, lowercase alphanumeric with underscores only'
+            )
+        return v
+
+
+class AllDepartmentsResponse(BaseModel):
+    """Schema for response containing all departments (standard + custom)"""
+    departments: List[str] = Field(..., description="All departments")
+    standard_departments: List[str] = Field(..., description="Standard departments (read-only)")
+    custom_departments: List[str] = Field(..., description="Custom departments")
+
+
+class DepartmentInUseError(BaseModel):
+    """Schema for error when trying to delete a department in use"""
+    error: str = Field(..., description="Error message")
+    department: str = Field(..., description="Department that is in use")
+    member_count: int = Field(..., description="Number of project members using this department")
+    task_count: int = Field(..., description="Number of tasks using this department")

backend/schemas/project.py

@@ -5,7 +5,6 @@ from enum import Enum
 import re
 
 from models.project import ProjectStatus, ProjectType
-from models.user import DepartmentRole
 
 
 # Technical Specifications Schemas
@@ -67,16 +66,6 @@ class ProjectTechnicalSpecs(BaseModel):
             raise ValueError('Delivery image resolution must be in format "WIDTHxHEIGHT" (e.g., "1920x1080")')
         return v
 
-    @validator('delivery_movie_specs_by_department')
-    def validate_delivery_movie_specs_by_department(cls, v):
-        if v is None:
-            return {}
-        allowed_departments = ['layout', 'animation', 'lighting', 'composite', 'modeling', 'rigging', 'surfacing']
-        for dept in v.keys():
-            if dept not in allowed_departments:
-                raise ValueError(f'Department must be one of: {", ".join(allowed_departments)}')
-        return v
-
 
 # Default delivery movie specifications per department
 DEFAULT_DELIVERY_MOVIE_SPECS = {
@@ -135,17 +124,6 @@ class ProjectBase(BaseModel):
             raise ValueError('Delivery image resolution must be in format "WIDTHxHEIGHT" (e.g., "1920x1080")')
         return v
 
-    @validator('delivery_movie_specs_by_department')
-    def validate_delivery_movie_specs_by_department(cls, v):
-        if v is None:
-            return {}
-        allowed_departments = ['layout', 'animation', 'lighting', 'composite', 'modeling', 'rigging', 'surfacing']
-        for dept in v.keys():
-            if dept not in allowed_departments:
-                raise ValueError(f'Department must be one of: {", ".join(allowed_departments)}')
-        return v
-
-
 class ProjectCreate(ProjectBase):
     pass
 
@@ -178,20 +156,9 @@ class ProjectUpdate(BaseModel):
             raise ValueError('Delivery image resolution must be in format "WIDTHxHEIGHT" (e.g., "1920x1080")')
         return v
 
-    @validator('delivery_movie_specs_by_department')
-    def validate_delivery_movie_specs_by_department(cls, v):
-        if v is None:
-            return v
-        allowed_departments = ['layout', 'animation', 'lighting', 'composite', 'modeling', 'rigging', 'surfacing']
-        for dept in v.keys():
-            if dept not in allowed_departments:
-                raise ValueError(f'Department must be one of: {", ".join(allowed_departments)}')
-        return v
-
-
 class ProjectMemberBase(BaseModel):
     user_id: int
-    department_role: Optional[DepartmentRole] = None
+    department_role: Optional[str] = None
 
 
 class ProjectMemberCreate(ProjectMemberBase):
@@ -199,7 +166,7 @@ class ProjectMemberCreate(ProjectMemberBase):
 
 
 class ProjectMemberUpdate(BaseModel):
-    department_role: Optional[DepartmentRole] = None
+    department_role: Optional[str] = None
 
 
 class ProjectMemberResponse(ProjectMemberBase):

backend/schemas/task.py

@@ -4,7 +4,6 @@ from datetime import date, datetime
 from enum import Enum
 
 from models.task import TaskType, TaskStatus, ReviewDecision, AttachmentType, NoteType
-from models.user import DepartmentRole
 
 
 class TaskBase(BaseModel):
@@ -14,6 +13,7 @@ class TaskBase(BaseModel):
     start_date: Optional[date] = None
     deadline: Optional[date] = None
     status: str = "not_started"  # Changed from TaskStatus enum to str to support custom statuses
+    department: Optional[str] = None  # Standard or project-custom department, independent of assignee
 
 
 class TaskCreate(TaskBase):
@@ -31,6 +31,7 @@ class TaskUpdate(BaseModel):
     start_date: Optional[date] = None
     deadline: Optional[date] = None
     status: Optional[str] = None  # Changed from TaskStatus enum to str to support custom statuses
+    department: Optional[str] = None  # Standard or project-custom department, independent of assignee
     assigned_user_id: Optional[int] = None
 
 
@@ -70,6 +71,7 @@ class TaskListResponse(BaseModel):
     name: str
     task_type: str  # Changed from TaskType enum to str to support custom task types
     status: str  # Changed from TaskStatus enum to str to support custom statuses
+    department: Optional[str] = None  # Standard or project-custom department, independent of assignee
     start_date: Optional[date] = None
     deadline: Optional[date] = None
     project_id: int