Initial commit: Voiced invoice desktop app

Offline-first invoicing app for Arun P, 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/App.tsx

@@ -0,0 +1,98 @@
+import { useCallback, useEffect, useState } from "react";
+import { InlineNotification, Loading, Theme } from "@carbon/react";
+import { api } from "./lib/api";
+import type { Settings } from "./lib/types";
+import { AppShell, type AppView } from "./components/AppShell";
+import Onboarding from "./views/Onboarding";
+import NewInvoice from "./views/NewInvoice";
+import InvoiceHistory from "./views/InvoiceHistory";
+import SeriesSettings from "./views/SeriesSettings";
+import AppSettings from "./views/AppSettings";
+
+export default function App() {
+  const [settings, setSettings] = useState<Settings | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [view, setView] = useState<AppView>("new");
+
+  const refreshSettings = useCallback(async () => {
+    try {
+      const next = await api.getSettings();
+      setSettings(next);
+      setError(null);
+    } catch (e) {
+      setError(String(e));
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void refreshSettings();
+  }, [refreshSettings]);
+
+  if (loading) {
+    return (
+      <Theme theme="g10">
+        <div className="voiced-empty">
+          <Loading description="Loading Voiced" withOverlay={false} small />
+        </div>
+      </Theme>
+    );
+  }
+
+  if (error) {
+    return (
+      <Theme theme="g10">
+        <div className="voiced-page">
+          <InlineNotification
+            kind="error"
+            lowContrast
+            title="Could not start Voiced"
+            subtitle={error}
+            hideCloseButton
+          />
+        </div>
+      </Theme>
+    );
+  }
+
+  if (!settings) return null;
+
+  const theme = settings.theme === "g100" ? "g100" : "g10";
+
+  if (!settings.onboarded) {
+    return (
+      <Theme theme={theme}>
+        <Onboarding
+          initial={settings}
+          onDone={(next) => {
+            setSettings(next);
+            setView("new");
+          }}
+        />
+      </Theme>
+    );
+  }
+
+  const toggleTheme = async () => {
+    const next: Settings = { ...settings, theme: settings.theme === "g100" ? "g10" : "g100" };
+    setSettings(next);
+    try {
+      await api.saveSettings(next);
+    } catch (e) {
+      setError(String(e));
+    }
+  };
+
+  return (
+    <Theme theme={theme}>
+      <AppShell view={view} onNavigate={setView} theme={settings.theme} onToggleTheme={toggleTheme}>
+        {view === "new" && <NewInvoice settings={settings} onSettingsChange={refreshSettings} />}
+        {view === "invoices" && <InvoiceHistory settings={settings} />}
+        {view === "series" && <SeriesSettings />}
+        {view === "settings" && <AppSettings settings={settings} onSaved={refreshSettings} />}
+      </AppShell>
+    </Theme>
+  );
+}