Fix P2P: remove incorrect .default on react-native-tcp-socket require

react-native-tcp-socket exports createConnection directly via
module.exports, not as .default. The require was calling
TcpSocket.default.createConnection which is undefined, causing
a silent crash that was caught as a P2P error.

Verified: Node.js test against seed1.fairco.in:46372 confirms
handshake completes successfully with protocol version 71000.

Also includes edge-to-edge scrolling improvements.

Author: NateIsern

src/p2p/socket-provider.ts

@@ -67,11 +67,11 @@ function getElectronAPI(): ElectronAPI | undefined {
 
 class NativeSocketProvider implements SocketProvider {
   connect(host: string, port: number): SocketConnection {
-    const TcpSocket = require("react-native-tcp-socket") as { default: NativeTcpModule };
+    const TcpSocket = require("react-native-tcp-socket") as NativeTcpModule;
 
     let connectCallback: (() => void) | undefined;
 
-    const socket = TcpSocket.default.createConnection({ host, port }, () => {
+    const socket = TcpSocket.createConnection({ host, port }, () => {
       if (connectCallback) {
         connectCallback();
       }