Rebrand: polkadot → pezkuwi build fixes

- Fixed TypeScript type assertion issues
- Updated imports from api-augment/substrate to api-augment/bizinikiwi
- Fixed imgConvert.mjs header and imports
- Added @ts-expect-error for runtime-converted types
- Fixed all @polkadot copyright headers to @pezkuwi

web/src/pages/Dashboard.tsx

@@ -234,7 +234,7 @@ export default function Dashboard() {
 
     setRenouncingCitizenship(true);
     try {
-      const { web3FromAddress } = await import('@polkadot/extension-dapp');
+      const { web3FromAddress } = await import('@pezkuwi/extension-dapp');
       const injector = await web3FromAddress(selectedAccount.address);
 
       if (import.meta.env.DEV) console.log('Renouncing citizenship...');

web/src/pages/Developers.tsx

@@ -11,7 +11,7 @@ const CodeSnippet = ({ language, code }: { language: string, code: string }) =>
 );
 
 const Developers: React.FC = () => {
-  const connectCode = `import { ApiPromise, WsProvider } from '@polkadot/api';
+  const connectCode = `import { ApiPromise, WsProvider } from '@pezkuwi/api';
 
 // Connect to the PezkuwiChain node
 const wsProvider = new WsProvider('wss://rpc.pezkuwichain.io');

web/src/pages/Elections.tsx

@@ -47,7 +47,7 @@ import {
   type CandidateInfo,
 } from '@pezkuwi/lib/welati';
 // import { handleBlockchainError, handleBlockchainSuccess } from '@pezkuwi/lib/error-handler';
-// import { web3FromAddress } from '@polkadot/extension-dapp';
+// import { web3FromAddress } from '@pezkuwi/extension-dapp';
 
 export default function Elections() {
   const { api, isApiReady } = usePolkadot();

web/src/pages/networks/NetworkPage.tsx

@@ -186,7 +186,7 @@ const NetworkPage: React.FC<NetworkPageProps> = ({
           <div className="bg-gray-950 rounded-lg p-4 border border-gray-800">
             <pre className="text-sm overflow-x-auto">
               <code className="text-gray-300">
-{`import { ApiPromise, WsProvider } from '@polkadot/api';
+{`import { ApiPromise, WsProvider } from '@pezkuwi/api';
 
 const provider = new WsProvider('${endpoint}');
 const api = await ApiPromise.create({ provider });