Initial commit: Voiced invoice desktop app

Offline-first invoicing app for Test Vendor, built by Bongbetic.

- Tauri v2 (Rust) + React/TypeScript + IBM Carbon Design System UI
- SQLite (rusqlite) storage with a persistent invoice-number series
- Guided first-run setup, pre-filled vendor/bank details
- Fixed-amount or rate x quantity line items (per sec/min/hour/session/unit)
- GST as CGST+SGST or IGST, Indian amount-in-words
- Optional signature, with a computer-generated note as fallback
- Print-ready PDF export via @react-pdf/renderer
- Windows cross-compile via cargo-xwin (NSIS installer)

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

src/lib/api.ts

@@ -0,0 +1,43 @@
+import { invoke } from "@tauri-apps/api/core";
+import type {
+  BankAccount,
+  Client,
+  Invoice,
+  InvoiceInput,
+  InvoiceSeries,
+  InvoiceSummary,
+  Settings,
+} from "./types";
+
+export const api = {
+  getSettings: () => invoke<Settings>("get_settings"),
+  saveSettings: (settings: Settings) => invoke<Settings>("save_settings", { settings }),
+
+  listBanks: () => invoke<BankAccount[]>("list_banks"),
+  saveBank: (bank: BankAccount) => invoke<BankAccount>("save_bank", { bank }),
+  deleteBank: (id: number) => invoke<void>("delete_bank", { id }),
+
+  getActiveSeries: () => invoke<InvoiceSeries | null>("get_active_series"),
+  listSeries: () => invoke<InvoiceSeries[]>("list_series"),
+  startNewSeries: (prefix: string, padding: number) =>
+    invoke<InvoiceSeries>("start_new_series", { prefix, padding }),
+
+  listClients: () => invoke<Client[]>("list_clients"),
+  saveClient: (client: Client) => invoke<Client>("save_client", { client }),
+  deleteClient: (id: number) => invoke<void>("delete_client", { id }),
+
+  peekNextInvoiceNumber: () => invoke<string>("peek_next_invoice_number"),
+  createInvoice: (input: InvoiceInput) => invoke<Invoice>("create_invoice", { input }),
+  listInvoices: () => invoke<InvoiceSummary[]>("list_invoices"),
+  getInvoice: (id: number) => invoke<Invoice>("get_invoice", { id }),
+  deleteInvoice: (id: number) => invoke<void>("delete_invoice", { id }),
+
+  importAsset: (sourcePath: string, kind: string) =>
+    invoke<string>("import_asset", { sourcePath, kind }),
+  saveAssetBytes: (kind: string, fileName: string, dataBase64: string) =>
+    invoke<string>("save_asset_bytes", { kind, fileName, dataBase64 }),
+  readAssetDataUri: (path: string) => invoke<string>("read_asset_data_uri", { path }),
+  removeAsset: (path: string) => invoke<void>("remove_asset", { path }),
+  saveBinaryFile: (path: string, dataBase64: string) =>
+    invoke<void>("save_binary_file", { path, dataBase64 }),
+};