TUN mode incompatible with Node.js/Bun applications (Claude Code hangs on connectivity check)

### Application Outline Client ### Describe the bug When Outline is connected in TUN mode (outline-tap0), Node.js/Bun-based applications cannot establish connections through the TUN interface. The TCP handshake succeeds but TLS never completes, causing apps to hang indefinitely waiting for a response. ### Steps to reproduce Connect to Outline VPN on Windows 11 Run any Node.js or Bun application that makes HTTPS requests The application hangs — TCP connections show as ESTABLISHED in netstat but no data is exchanged ### What did you expect to happen? All system traffic should be routed through the TUN interface regardless of the runtime/HTTP stack used by the application. ### What actually happened? Claude Code (which uses the Bun runtime internally) does not route traffic through Outline's TUN interface (`outline-tap0`) correctly. TCP connections to Anthropic endpoints appear as ESTABLISHED in `netstat`, but no data is actually exchanged — the app hangs indefinitely on `Checking connectivity...` with no error message and no timeout. The issue is specific to TUN mode. When a local HTTP proxy is explicitly set via `HTTPS_PROXY=http://127.0.0.1:1080` (using shadowsocks-windows as a bridge), Claude Code works immediately. This confirms that Outline's TUN interface does not properly handle traffic from the Bun/Node.js network stack. Other VPN clients that expose a local proxy port (e.g. Happ) work without any workaround. ### Outline Version 1.19.0 (490240) ### What operation system are you using? Windows ### Operating System Version Windows 11 ### Screenshots and Videos _No response_