[eric] windows: fix UA-spoof leak onto recreated main window + add diag logs across preload, createWindow, recreateMainWindow, resumeSession, launchAndSendFirstMessage, AgentChat, WebSocketManager so packaged-build stderr captures the chat-spawn crash trail

frontend/src/app/pages/AgentChat/AgentChat.tsx

@@ -159,6 +159,8 @@ interface AgentChatProps {
 }
 
 const AgentChat: React.FC<AgentChatProps> = ({ sessionId: sessionIdProp, onClose, embedded, autoFocus, isGlowing, onDismissGlow, initialContextPaths, onBranch }) => {
+  // eslint-disable-next-line no-console
+  console.log('[diag][AgentChat] render', { sessionIdProp, embedded });
   const c = useClaudeTokens();
   const STATUS_STYLES: Record<string, { color: string; bg: string }> = {
     running: { color: c.status.success, bg: c.status.successBg },

frontend/src/app/pages/Dashboard/cards/BrowserCard.tsx

@@ -74,6 +74,8 @@ const HANDLE_DEFS: { dir: ResizeDir; sx: Record<string, any> }[] = [
 ];
 
 const isElectron = navigator.userAgent.includes('Electron');
+// eslint-disable-next-line no-console
+console.log('[diag][BrowserCard] isElectron=', isElectron, 'ua=', navigator.userAgent, 'hasOpenswarm=', !!(window as any).openswarm);
 
 const chromeUserAgent = navigator.userAgent
   .replace(/\s*Electron\/\S+/, '')