refactor: revew all design of services, clients, deadcode, ...

services/admin-service.ts

@@ -1,39 +1,6 @@
 import { getPool } from "./database";
 import { Team, SkillCategory } from "@/lib/types";
-
-export interface TeamMember {
-  uuid: string;
-  firstName: string;
-  lastName: string;
-  skills: Array<{
-    skillId: string;
-    skillName: string;
-    category: string;
-    level: number;
-    canMentor: boolean;
-    wantsToLearn: boolean;
-  }>;
-  joinDate: string;
-}
-
-export interface TeamStats {
-  teamId: string;
-  teamName: string;
-  direction: string;
-  totalMembers: number;
-  averageSkillLevel: number;
-  topSkills: Array<{ skillName: string; averageLevel: number; icon?: string }>;
-  skillCoverage: number; // Percentage of skills evaluated
-  members: TeamMember[];
-}
-
-export interface DirectionStats {
-  direction: string;
-  teams: TeamStats[];
-  totalMembers: number;
-  averageSkillLevel: number;
-  topCategories: Array<{ category: string; averageLevel: number }>;
-}
+import { TeamMember, TeamStats, DirectionStats } from "@/lib/admin-types";
 
 export class AdminService {
   /**