feat(projects): support members and align rate payloads

apps/projects/services/memberships.py

@@ -1,16 +1,16 @@
 from rest_framework.exceptions import ValidationError
 from apps.projects.models import ProjectMembership
 
-def add_project_member(project, user, role):
+def add_project_member(project, user_id, role):
     """
     Adds a user to a project. Ensures no duplicate active memberships exist.
     """
-    if ProjectMembership.objects.filter(project=project, user=user, is_deleted=False).exists():
+    if ProjectMembership.objects.filter(project=project, user_id=user_id, is_deleted=False).exists():
         raise ValidationError({"user_id": "This user is already a member of the project."})
 
     return ProjectMembership.objects.create(
         project=project,
-        user=user,
+        user_id=user_id,
         role=role,
         is_active=True
     )

apps/projects/services/projects.py

@@ -1,6 +1,8 @@
 from django.db import transaction
+from django.shortcuts import get_object_or_404
 from rest_framework.exceptions import ValidationError, PermissionDenied
 
+from apps.clients.models import Client
 from apps.projects.models import Project, ProjectMembership
 from apps.workspaces.models import WorkspaceMembership
 
@@ -53,6 +55,10 @@ def update_project(project, **kwargs):
         if Project.objects.filter(workspace=project.workspace, name=kwargs["name"], is_deleted=False).exists():
             raise ValidationError({"name": "A project with this name already exists in the workspace."})
 
+    client_id = kwargs.pop("client")
+    client = get_object_or_404(Client, id=client_id, is_deleted=False) if client_id else None
+    kwargs["client"] = client
+
     for field, value in kwargs.items():
         if hasattr(project, field) and getattr(project, field) != value:
             setattr(project, field, value)

apps/projects/services/rates.py

@@ -1,11 +1,11 @@
-from apps.projects.models import ProjectRate, ProjectUserRate
-
-def create_project_rate(project, amount, currency="USD"):
-    return ProjectRate.objects.create(
-        project=project,
-        amount=amount,
-        currency=currency
-    )
+from apps.projects.models import ProjectRate, ProjectUserRate
+
+def create_project_rate(project, hourly_rate, currency="USD"):
+    return ProjectRate.objects.create(
+        project=project,
+        hourly_rate=hourly_rate,
+        currency=currency
+    )
 
 def update_project_rate(rate_instance, **kwargs):
     update_fields = []
@@ -20,13 +20,13 @@ def update_project_rate(rate_instance, **kwargs):
         
     return rate_instance
 
-def create_project_user_rate(project, user, amount, currency="USD"):
-    return ProjectUserRate.objects.create(
-        project=project,
-        user=user,
-        amount=amount,
-        currency=currency
-    )
+def create_project_user_rate(project, user_id, hourly_rate, currency="USD"):
+    return ProjectUserRate.objects.create(
+        project=project,
+        user_id=user_id,
+        hourly_rate=hourly_rate,
+        currency=currency
+    )
 
 def update_project_user_rate(user_rate_instance, **kwargs):
     update_fields = []