Add color-coded edit highlights with an in-preview legend, strip CSP meta
for srcdoc editing, and simplify fullscreen preview to immersive visual edit
only. Default billing to CNY token rates unless H5_USE_BACKEND_COST=1.
Co-authored-by: Cursor <cursoragent@cursor.com>
In-preview HTML editing with undo/redo sync replaces Agent patch auto-save; Plaza runs on local Mac via Cloudflare Tunnel with embed height and CSP fixes.
Co-authored-by: Cursor <cursoragent@cursor.com>
John