feat: add discount amount to invoice response and display in invoice view

distribution_fe/app/(dashboard)/sales/invoices/[id]/page.tsx

@@ -179,6 +179,7 @@ export default function InvoiceViewPage() {
 
       <div className="grid grid-cols-2 gap-4 rounded-2xl border p-4 sm:grid-cols-4">
         <Stat label="Total" value={fmtAmount(invoice.totalAmount)} />
+        {invoice.discountAmount > 0 && <Stat label="Scheme discount (included)" value={fmtAmount(invoice.discountAmount)} />}
         <Stat label="Paid" value={fmtAmount(paidAmount)} />
         <Stat label="Balance" value={fmtAmount(balance)} />
         <Stat label="Created" value={fmtDateTime(invoice.createdAt)} />

distribution_fe/lib/api/reports.ts

@@ -163,6 +163,7 @@ export const productReports = {
 export interface SalesKpis {
   grossSales: number
   returnValue: number
+  discounts: number
   netSales: number
   orders: number
   averageOrderValue: number
@@ -170,11 +171,19 @@ export interface SalesKpis {
   grossProfitMarginPercent: number | null
 }
 
+export interface CashKpis {
+  collected: number
+  outstanding: number
+  overdue: number
+  collectionRatePercent: number | null
+}
+
 export interface DashboardSalesSummary {
   from: string
   to: string
   granularity: 'day' | 'month'
   kpis: { current: SalesKpis; previous: SalesKpis; previousFrom: string; previousTo: string }
+  cash: { current: CashKpis; previous: CashKpis }
   trend: Array<{ period: string; sales: number; returns: number }>
   byCategory: Array<{ id: string | null; name: string; amount: number }>
   byRegion: Array<{ id: string | null; name: string; amount: number }>

distribution_fe/types/api.ts

@@ -1045,6 +1045,7 @@ export interface InvoiceResponse {
   finalizedAt: string | null
   finalizedBy: string | null
   totalAmount: number
+  discountAmount: number
   paidAmount: number
   isActive: boolean
   createdAt: string