Initial public release

Aurum — a self-hosted personal finance operating system: cash flow,
net worth tracking, budgets, goals, recurring payments, reports,
proactive alerts, and a compound-interest returns calculator, all
bilingual (RU/EN) and mobile-first. Ships as a three-container Docker
Compose stack (Postgres + FastAPI + nginx-served React frontend).

See README.md for setup and CONTRIBUTING.md for development.

frontend/src/hooks/useLocalStorageState.ts

@@ -0,0 +1,15 @@
+import { useState } from "react";
+
+export function useLocalStorageState(key: string, initial: boolean) {
+  const [value, setValue] = useState<boolean>(() => {
+    const stored = localStorage.getItem(key);
+    return stored === null ? initial : stored === "true";
+  });
+
+  const update = (next: boolean) => {
+    setValue(next);
+    localStorage.setItem(key, String(next));
+  };
+
+  return [value, update] as const;
+}