fix: improve error handling in API routes and update date handling for OKR and Key Result submissions

src/services/teams.ts

@@ -1,5 +1,5 @@
 import { prisma } from '@/services/database';
-import type { CreateTeamInput, UpdateTeamInput, AddTeamMemberInput, UpdateMemberRoleInput, TeamRole } from '@/lib/types';
+import type { UpdateTeamInput, TeamRole } from '@/lib/types';
 
 export async function createTeam(name: string, description: string | null, createdById: string) {
   // Create team and add creator as admin in a transaction