Why: Independent review found the cross-read toggle, the project inbox
scope and the archive-to-project action still reachable from an open
scratch (no-project) conversation.
Evidence: npx vitest run (685 tests) and npx tsc -b --noEmit pass locally
against the UI fix branch (SELF); CI on the PR head is authoritative.
Impact: Scratch conversations hide the cross-read setting, always show
the conversation inbox and omit onArchive; real projects are unchanged.
Refs: Agent-System-UI#60; agent-exec receipt u3e-run (cursor, success)
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: Accounts without project.create need isolated general-agent chats.
The sidebar groups every scratch session under one "无项目对话" entry
instead of the project switcher, and the client no longer auto-creates
a default project.
Evidence: npx vitest run (64 files, 677 tests) and npx tsc -b --noEmit
pass locally (SELF); CI on the PR head is authoritative.
Impact: createTask uses POST /api/scratch-sessions in scratch mode or
when no real project exists; scratch rows hide cross-read toggles and
project settings; "新建项目…" stays gated by project.create.
Refs: Agent-System-Dev docs/superpowers/specs/2026-10-22-scratch-session-general-agent-design.md;
agent-exec receipt u3-run5 (cursor, success)
Co-authored-by: Cursor <cursoragent@cursor.com>