Upstream prompt links without a repository do not open a thread on a managed Lazurio Environment #77

What happens

Upstream v0.1.0 adds prompt links (/new?prompt=…, pingdotgg#18454). A link without a repo opens a draft with no project. On a managed Lazurio Environment (T3CODE_LAZURIO_FOLDER) new threads may only start in the Lazurio Folder project, and the server hides Scratch, so such a link ends with "None of your machines can start a thread without a project right now", and its "Clone" offer points at newProjectsRoot, which the Folder guard refuses.

Why it is left for later

The rebuild on v0.1.0 (#70, decision D15-d) keeps the fork's own prepared-prompt link (row 6, D13: the text never travels in the address) and accepts this gap. Upstream's links never send anything, so nothing harmful happens; they just do not open a thread.

Possible fixes

• Map "no project" to the Folder project on a managed Environment (risk: the UI would present the Folder as "No project").
• Hide newProjectsRoot from the server config on a managed Environment (one more ws.ts line) so the link does not offer Clone.
• Propose upstream a way for a server to name the default project for links without repo.