Grant task creation permissions to managers

Update shared/permissions.ts to add 'create' permission to manager role for tasks module. Also, add a permission check in server/routes.ts before creating a task.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f2b9c241-9fdd-4abd-9041-720afc8b27d6
Replit-Commit-Checkpoint-Type: full_checkpoint

server/routes.ts

@@ -1645,6 +1645,11 @@ export async function registerRoutes(app: Express): Promise<Server> {
         return res.status(404).json({ message: "User not found" });
       }
 
+      // Check permissions for creating tasks
+      if (!hasPermission(user.role, 'tasks', 'create')) {
+        return res.status(403).json({ message: "Permission denied: cannot create tasks" });
+      }
+
       const data = {
         ...req.body,
         createdBy: user.id,