P6 Lost test: signed out, the pill's page today offers only Home.
Done:
[ ] When there is no user, toolbarPage shows 'Sign in to comment' as a btn to /signin?next= this toolbar page's path and query (env and page kept), next to Home.
[ ] After signing in, the person lands back on the same toolbar page with the comment form; safeNext refuses any other origin.
[ ] Tests: the signed-out page carries the link with the right next; a crafted next to another host is refused; bun x tsc --noEmit passes.
P6 Lost test: signed out, the pill's page today offers only Home.
Done:
toolbarPageshows 'Sign in to comment' as abtnto/signin?next=this toolbar page's path and query (env and page kept), next to Home.safeNextrefuses any other origin.next; a craftednextto another host is refused;bun x tsc --noEmitpasses.Files: src/web/studio/toolbar.ts, a test.