Code tab silently does nothing when user lacks Max plan — should show clear error

Description

When a user on a Pro plan opens the Code tab in Claude Code Desktop (Windows, v1.1.7714) and starts a new session (either local or via SSH remote connection), the session starts but no response is ever returned. The input box accepts text, pressing Enter appears to submit, but nothing happens.

Expected Behaviour

A clear message should be displayed explaining that the Code tab requires a Max plan subscription, with a link to upgrade. For example:

"Claude Code requires a Max plan. Upgrade at claude.ai/settings to use this feature."

Actual Behaviour

Silent failure — the session starts, the UI loads, but messages typed in the input box produce no response whatsoever. No error message, no indication that a plan upgrade is required.

Impact

Users waste significant time troubleshooting their SSH connection, authentication, project folder paths, and binary installations — all of which appear correct — when the real issue is simply a plan restriction that is never communicated.

Environment

• Claude Code Desktop for Windows v1.1.7714
• Pro plan subscription
• Tested with both Local and SSH remote session (Ubuntu Server 24.04 via Tailscale)
• Chat tab works correctly on the same account