Fresh install cannot start a thread in Full Access or Supervised mode

[christiannwamba]

On a fresh install of t3code, sending any message to an agent fails immediately.

Steps to reproduce

1. Clone and run t3code from source.
2. Start a new thread.
3. Send any message in Full Access mode.
4. Switch to Supervised mode and send any message.

Actual

• Full Access: thread/start failed: Invalid request: unknown variant 'danger-full-access', expected one of 'readOnly', 'workspaceWrite', 'dangerFullAccess'
• Supervised: thread/start failed: Invalid request: unknown variant 'on-request', expected one of 'unlessTrusted', 'onFailure', 'onRequest', 'never'

Expected
The thread starts and the message is sent in both modes.

Notes
This looks like a runtime enum/casing mismatch:

• danger-full-access vs dangerFullAccess
• on-request vs onRequest

This seems related to earlier reports like #389 and #453, but it is still reproducible on a fresh checkout.