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>
Track application source and tests; exclude local env, user workspaces, and runtime data via .gitignore.
Co-authored-by: Cursor <cursoragent@cursor.com>
John