Observe F7 in the installed Word with synthetic text, then replace the central correction form with a right-side task pane. Show sentence context, directly clickable suggestion cards and ignore/dictionary links. Use the existing pane host, palette and original icons; copy no Microsoft assets.
Keep per-window state and clear targets on document switch. Adapt UI tests, pseudo-localization exemptions and light/dark previews. Record observed measurements and remaining feature differences. Local cargo xtask ci was attempted but cargo is absent; exact-head hosted checks and visual comparison remain required.