Add ESLint + Prettier + EditorConfig tooling at repo root

v1.0 Phase 1.1 — repo-wide lint/format baseline.

- eslint.config.mjs (flat config) lints server, client, shared
- .prettierrc.json, .prettierignore, .editorconfig, .nvmrc
- Root package.json holds shared devDeps; per-package scripts keep
  their typecheck + test runners
- Fix 7 lint issues surfaced by the baseline run:
  - TicketDetail.tsx: replace ternary-with-side-effects with if/else
  - admin/Users.tsx: escape apostrophe in JSX
  - errorHandler.ts: typed err as unknown with ErrorLike refinement
  - users.ts: Prisma.UserUpdateInput instead of Record<string, any>
  - seed.ts: drop unused goddard binding
- Run prettier across tracked sources for a clean formatting baseline

client/src/types/index.ts

@@ -1,74 +1,74 @@
-export type Role = 'ADMIN' | 'AGENT' | 'USER' | 'SERVICE'
-export type TicketStatus = 'OPEN' | 'IN_PROGRESS' | 'RESOLVED' | 'CLOSED'
+export type Role = 'ADMIN' | 'AGENT' | 'USER' | 'SERVICE';
+export type TicketStatus = 'OPEN' | 'IN_PROGRESS' | 'RESOLVED' | 'CLOSED';
 
 export interface User {
-  id: string
-  username: string
-  displayName: string
-  email: string
-  role: Role
-  apiKey?: string
-  createdAt?: string
+  id: string;
+  username: string;
+  displayName: string;
+  email: string;
+  role: Role;
+  apiKey?: string;
+  createdAt?: string;
 }
 
 export interface Category {
-  id: string
-  name: string
+  id: string;
+  name: string;
 }
 
 export interface CTIType {
-  id: string
-  name: string
-  categoryId: string
-  category?: Category
+  id: string;
+  name: string;
+  categoryId: string;
+  category?: Category;
 }
 
 export interface Item {
-  id: string
-  name: string
-  typeId: string
-  type?: CTIType & { category?: Category }
+  id: string;
+  name: string;
+  typeId: string;
+  type?: CTIType & { category?: Category };
 }
 
 export interface Comment {
-  id: string
-  body: string
-  ticketId: string
-  authorId: string
-  author: Pick<User, 'id' | 'username' | 'displayName'>
-  createdAt: string
+  id: string;
+  body: string;
+  ticketId: string;
+  authorId: string;
+  author: Pick<User, 'id' | 'username' | 'displayName'>;
+  createdAt: string;
 }
 
 export interface AuditLog {
-  id: string
-  ticketId: string
-  userId: string
-  action: string
-  detail: string | null
-  createdAt: string
-  user: Pick<User, 'id' | 'username' | 'displayName'>
+  id: string;
+  ticketId: string;
+  userId: string;
+  action: string;
+  detail: string | null;
+  createdAt: string;
+  user: Pick<User, 'id' | 'username' | 'displayName'>;
 }
 
 export interface Ticket {
-  id: string
-  displayId: string
-  title: string
-  overview: string
-  severity: number
-  status: TicketStatus
-  categoryId: string
-  typeId: string
-  itemId: string
-  assigneeId: string | null
-  createdById: string
-  resolvedAt: string | null
-  createdAt: string
-  updatedAt: string
-  category: Category
-  type: CTIType
-  item: Item
-  assignee: Pick<User, 'id' | 'username' | 'displayName'> | null
-  createdBy: Pick<User, 'id' | 'username' | 'displayName'>
-  comments?: Comment[]
-  _count?: { comments: number }
+  id: string;
+  displayId: string;
+  title: string;
+  overview: string;
+  severity: number;
+  status: TicketStatus;
+  categoryId: string;
+  typeId: string;
+  itemId: string;
+  assigneeId: string | null;
+  createdById: string;
+  resolvedAt: string | null;
+  createdAt: string;
+  updatedAt: string;
+  category: Category;
+  type: CTIType;
+  item: Item;
+  assignee: Pick<User, 'id' | 'username' | 'displayName'> | null;
+  createdBy: Pick<User, 'id' | 'username' | 'displayName'>;
+  comments?: Comment[];
+  _count?: { comments: number };
 }