New Task now opens directly as an empty ChatThread (NewTaskChat) instead of a separate compose screen, sized like a real task window. The Scope/Activity context rail in a task window no longer renders until there's actually something to show (touched entities, activity, or an open question), avoiding an empty-placeholder sidebar on every new task. Also fixes the chat input defaulting to several lines tall on window open, centers the empty-chat greeting vertically, and gives floating windows the same frosted-glass look as the desktop's task launcher card. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>