Improve portable launch, forge persistence, and operator auth UX.

Persist build extra_files for Build Manager history, print dashboard login on every start, add libp2p for Mesh P2P forge, defer WebSocket until login, and split devrun.bat from LAUNCH.bat with USB deck auto-detection.

server/web/src/pages/BuilderPage.test.tsx

@@ -7,12 +7,13 @@ import userEvent from '@testing-library/user-event';
 import { MemoryRouter } from 'react-router-dom';
 import BuilderPage, { formatBytes } from './BuilderPage';
 import { ForgeProvider } from '../context/ForgeContext';
+import { routerFuture } from '../routerFuture';
 import { mockServerConfig, mockServerInfo } from '../test/fixtures';
 import { api } from '../api/client';
 
 function renderBuilder(initialEntries = ['/forge']) {
   return render(
-    <MemoryRouter initialEntries={initialEntries}>
+    <MemoryRouter initialEntries={initialEntries} future={routerFuture}>
       <ForgeProvider>
         <BuilderPage />
       </ForgeProvider>