Allow the image insertion dialog to select a local image and embed it as a Base64 data URL, while retaining URL-based insertion and leaving video URL-only.
Extract shared abortable FileReader handling for clipboard uploads and dialog selection; add English and Simplified Chinese messages plus an interaction test covering file selection through insertion.
Introduce @workspace/lexical with composable actions, toolbars, embeds, rich-text nodes, media uploads, selection utilities, HTML serialization, and theme styling.\n\nLocalize built-in controls through MessageDescriptor catalogs for English and Simplified Chinese, while providing an English I18nProvider fallback for standalone editor use. Include focused unit coverage for actions, controls, serialization, plugins, public API, and catalogs.
Maofeng