Add FunZone sync for sales and purchases, voucher filters, and event-name support.

Manual sync buttons pull customer payments and owner payouts into treasury, invoices, and accounting vouchers; voucher page gains category, date, status, and search filters; supplier vouchers dedupe against treasury-backed entries.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/types/index.ts

@@ -27,6 +27,8 @@ export interface Voucher {
   number: number
   date: string
   description: string
+  /** Event or subject the voucher relates to (بابت). */
+  regarding?: string
   status: VoucherStatus
   lines: VoucherLine[]
   /** Set when the voucher was generated automatically by another module. */
@@ -103,6 +105,8 @@ export interface InvoiceLine {
   unitPrice: number
   discount: number
   taxRate: number
+  /** FunZone event the customer paid for (shown in کالا / بابت). */
+  eventName?: string
 }
 
 export type InvoiceKind = 'sale' | 'purchase'
@@ -139,6 +143,8 @@ export interface TreasuryTxn {
   ownerNetAmount?: number
   reference: string
   description: string
+  /** FunZone event name when imported from customer payments. */
+  eventName?: string
   /** Set when imported from FunZone platform (dedup key). */
   source?: string
 }