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/react-hooks/src/useInflation.ts

@@ -0,0 +1,68 @@
+// Copyright 2017-2025 @pezkuwi/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { ApiPromise } from '@pezkuwi/api';
+import type { BN } from '@pezkuwi/util';
+import type { Inflation } from './types.js';
+
+import { useEffect, useState } from 'react';
+
+import { getInflationParams } from '@pezkuwi/apps-config';
+import { BN_MILLION, BN_ZERO } from '@pezkuwi/util';
+
+import { createNamedHook } from './createNamedHook.js';
+import { useApi } from './useApi.js';
+import { useCall } from './useCall.js';
+
+const EMPTY: Inflation = { idealInterest: 0, idealStake: 0, inflation: 0, stakedFraction: 0, stakedReturn: 0 };
+
+function calcInflation (api: ApiPromise, totalStaked: BN, totalIssuance: BN, numAuctions: BN): Inflation {
+  const { auctionAdjust, auctionMax, falloff, maxInflation, minInflation, stakeTarget } = getInflationParams(api);
+  const stakedFraction = totalStaked.isZero() || totalIssuance.isZero()
+    ? 0
+    : totalStaked.mul(BN_MILLION).div(totalIssuance).toNumber() / BN_MILLION.toNumber();
+  // Ideal is less based on the actual auctions, see
+  // https://github.com/pezkuwichain/pezkuwi/blob/816cb64ea16102c6c79f6be2a917d832d98df757/runtime/dicle/src/lib.rs#L531
+  const idealStake = stakeTarget - (Math.min(auctionMax, numAuctions.toNumber()) * auctionAdjust);
+  const idealInterest = idealStake === 0
+    ? 0
+    : maxInflation / idealStake;
+  // inflation calculations, see
+  // https://github.com/pezkuwichain/bizinikiwi/blob/0ba251c9388452c879bfcca425ada66f1f9bc802/frame/staking/reward-fn/src/lib.rs#L28-L54
+  const inflation = 100 * (minInflation + (
+    stakedFraction <= idealStake
+      ? (stakedFraction * (idealInterest - (minInflation / idealStake)))
+      : ((maxInflation - minInflation) * Math.pow(2, (idealStake - stakedFraction) / falloff))
+  ));
+
+  return {
+    idealInterest,
+    idealStake,
+    inflation,
+    stakedFraction,
+    stakedReturn: stakedFraction
+      ? (inflation / stakedFraction)
+      : 0
+  };
+}
+
+function useInflationImpl (totalStaked?: BN): Inflation {
+  const { api } = useApi();
+  const totalIssuance = useCall<BN>(api.query.balances?.totalIssuance);
+  const auctionCounter = useCall<BN>(api.query.auctions?.auctionCounter);
+  const [state, setState] = useState<Inflation>(EMPTY);
+
+  useEffect((): void => {
+    const numAuctions = api.query.auctions
+      ? auctionCounter
+      : BN_ZERO;
+
+    numAuctions && totalIssuance && totalStaked && setState(
+      calcInflation(api, totalStaked, totalIssuance, numAuctions)
+    );
+  }, [api, auctionCounter, totalIssuance, totalStaked]);
+
+  return state;
+}
+
+export const useInflation = createNamedHook('useInflation', useInflationImpl);