fix: handle team member not found in create task

Author: asepindrak

backend/src/project-management/project-management.service.ts

@@ -341,14 +341,21 @@ export class ProjectManagementService {
       });
       if (!p) throw new NotFoundException("Project not found");
     }
+
+    let assigneeId: any = "";
     if (
       typeof payload.assigneeId !== "undefined" &&
       payload.assigneeId !== null
     ) {
       const m = await prisma.teamMember.findUnique({
         where: { id: payload.assigneeId },
       });
-      if (!m) throw new NotFoundException("Assignee not found");
+      if (m) {
+        assigneeId = m?.id ?? null;
+      } else {
+        const m = await prisma.teamMember.findFirst();
+        assigneeId = m?.id ?? null;
+      }
     }
 
     // Defensive idempotency: if clientId provided and server already has it, return existing row
@@ -373,7 +380,7 @@ export class ProjectManagementService {
         projectId: payload.projectId ?? null,
         status: payload.status ?? "todo",
         priority: payload.priority ?? null,
-        assigneeId: payload.assigneeId ?? null,
+        assigneeId: assigneeId ?? null,
         startDate:
           typeof payload.startDate === "undefined"
             ? null
@@ -444,13 +451,13 @@ export class ProjectManagementService {
       const m = await prisma.teamMember.findUnique({
         where: { id: payload.assigneeId },
       });
-      if (!m) throw new NotFoundException("Assignee not found");
+      if (!m) throw new NotFoundException("Assignee not found (payload)");
       assignee = m;
     } else if (data.assigneeId !== "undefined" && data.assigneeId !== null) {
       const m = await prisma.teamMember.findUnique({
         where: { id: data.assigneeId },
       });
-      if (!m) throw new NotFoundException("Assignee not found");
+      if (!m) throw new NotFoundException("Assignee not found (data)");
       assignee = m;
     }