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server/src/types/index.ts

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+// ─── JWT Payload ──────────────────────────────────────────────────────────────
+
+export type Role = 'admin' | 'reseller' | 'user'
+
+export interface JwtPayload {
+  sub: number
+  role: Role
+  username: string
+  iat?: number
+  exp?: number
+}
+
+// ─── Fastify type augmentation ────────────────────────────────────────────────
+
+declare module 'fastify' {
+  interface FastifyRequest {
+    user?: JwtPayload
+  }
+}
+
+// ─── API Response helpers ─────────────────────────────────────────────────────
+
+export interface ApiSuccess<T = unknown> {
+  success: true
+  data: T
+}
+
+export interface ApiError {
+  success: false
+  error: string
+  code?: string
+}
+
+export type ApiResponse<T = unknown> = ApiSuccess<T> | ApiError
+
+// ─── Pagination ───────────────────────────────────────────────────────────────
+
+export interface PaginationQuery {
+  page?: number
+  limit?: number
+  search?: string
+  status?: string
+  sortBy?: string
+  sortDir?: 'asc' | 'desc'
+}
+
+export interface PaginatedResult<T> {
+  items: T[]
+  total: number
+  page: number
+  limit: number
+  totalPages: number
+}
+
+// ─── System ───────────────────────────────────────────────────────────────────
+
+export interface SystemStats {
+  cpu: number
+  memory: { total: number; used: number; free: number; percent: number }
+  disk: { total: number; used: number; free: number; percent: number }
+  load: [number, number, number]
+  uptime: number
+}
+
+export interface ServiceStatus {
+  name: string
+  status: 'running' | 'stopped' | 'failed' | 'unknown'
+  enabled: boolean
+}