feat: initial Pezkuwi Apps rebrand from polkadot-apps

Rebranded terminology:
- Polkadot → Pezkuwi
- Kusama → Dicle
- Westend → Zagros
- Rococo → PezkuwiChain
- Substrate → Bizinikiwi
- parachain → teyrchain

Custom logos with Kurdistan brand colors (#e6007a → #86e62a):
- bizinikiwi-hexagon.svg
- sora-bizinikiwi.svg
- hezscanner.svg
- heztreasury.svg
- pezkuwiscan.svg
- pezkuwistats.svg
- pezkuwiassembly.svg
- pezkuwiholic.svg

packages/page-democracy/src/useChangeCalc.ts

@@ -0,0 +1,33 @@
+// Copyright 2017-2025 @pezkuwi/app-democracy authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { VoteThreshold } from '@pezkuwi/types/interfaces';
+import type { BN } from '@pezkuwi/util';
+
+import { useEffect, useState } from 'react';
+
+import { createNamedHook, useApi, useCall } from '@pezkuwi/react-hooks';
+import { BN_ZERO } from '@pezkuwi/util';
+
+import { approxChanges } from './util.js';
+
+interface Result {
+  changeAye: BN;
+  changeNay: BN;
+}
+
+function useChangeCalcImpl (threshold: VoteThreshold, votedAye: BN, votedNay: BN, votedTotal: BN): Result {
+  const { api } = useApi();
+  const sqrtElectorate = useCall<BN>(api.derive.democracy.sqrtElectorate);
+  const [result, setResult] = useState<Result>({ changeAye: BN_ZERO, changeNay: BN_ZERO });
+
+  useEffect((): void => {
+    sqrtElectorate && setResult(
+      approxChanges(threshold, sqrtElectorate, { votedAye, votedNay, votedTotal })
+    );
+  }, [sqrtElectorate, threshold, votedAye, votedNay, votedTotal]);
+
+  return result;
+}
+
+export default createNamedHook('useChangeCalc', useChangeCalcImpl);