V3 Code v0.0.25 multi-agent cloud update

V3 Code multi-agent cloud update

• Adds the multi-chat workspace with single, left/right, up/down, and four-quarter layouts.
• Adds the Google OAuth login surface and cloud/server-node admin controls for live chats and devices.
• Deploys the Mini PC server-node web surface and fixes Windows cloud build portability.
• Rebuilds the Windows NSIS installer from this commit.

Verification:

• bun fmt
• bun lint
• bun typecheck
• bun run test
• bun run build
• bun run build:web-cloud
• bun run build:desktop
• bun run dist:desktop:win
• Browser DOM checks against https://v3.agaminggod.com/login and https://v3.agaminggod.com/app/admin