feat(customers): add dashboard and customer management

frontend/athena/types/customer.ts

@@ -0,0 +1,89 @@
+export type CustomerStatus = "lead" | "active" | "inactive" | "blocked" | "archived";
+export type CustomerType = "company" | "private" | "public_sector" | "partner" | "supplier";
+export type AddressType = "billing" | "shipping" | "primary" | "other";
+
+export interface CustomerAddress {
+  id: number;
+  customer_id: number;
+  type: AddressType;
+  street: string;
+  postal_code: string;
+  city: string;
+  state: string;
+  country: string;
+  is_primary: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface CustomerContact {
+  id: number;
+  customer_id: number;
+  first_name: string;
+  last_name: string;
+  position: string;
+  email: string;
+  phone: string;
+  mobile: string;
+  is_primary: boolean;
+  notes: string;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface Customer {
+  id: number;
+  customer_number: string;
+  company_name: string;
+  legal_name: string;
+  customer_type: CustomerType;
+  status: CustomerStatus;
+  industry: string;
+  website: string;
+  email: string;
+  phone: string;
+  tax_number: string;
+  vat_id: string;
+  notes: string;
+  addresses: CustomerAddress[];
+  contacts: CustomerContact[];
+  created_at: string;
+  updated_at: string;
+}
+
+export type CustomerPayload = {
+  customer_number: string;
+  company_name: string;
+  legal_name: string;
+  customer_type: CustomerType;
+  status: CustomerStatus;
+  industry: string;
+  website?: string | null;
+  email?: string | null;
+  phone: string;
+  tax_number: string;
+  vat_id: string;
+  notes: string;
+  addresses: CustomerAddressPayload[];
+};
+
+export type CustomerAddressPayload = {
+  type: AddressType;
+  street: string;
+  postal_code: string;
+  city: string;
+  state: string;
+  country: string;
+  is_primary: boolean;
+};
+
+export type CustomerContactPayload = {
+  first_name: string;
+  last_name: string;
+  position: string;
+  email?: string | null;
+  phone: string;
+  mobile: string;
+  is_primary: boolean;
+  notes: string;
+};

frontend/athena/types/dashboard.ts

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+import type { Customer } from "@/types/customer";
+
+export interface MetricCard {
+  label: string;
+  value: number;
+}
+
+export interface EmptyWidget {
+  title: string;
+  message: string;
+}
+
+export interface DashboardSummary {
+  customers: MetricCard[];
+  latest_customers: Customer[];
+  users: MetricCard[];
+  roles: MetricCard[];
+  activities: EmptyWidget;
+  tasks: EmptyWidget;
+  tickets: EmptyWidget;
+  projects: EmptyWidget;
+}