Handle clipboard images while editing or selecting a topic and route Insert image through the same topic attachment behavior. Read image data locally in preview mode and retain the production upload path.
Add four browser regression cases for real clipboard paste, undo/redo, export resources, canvas images, and text input isolation. Record validation in the client comparison notes.
Add native-style menus, search and presentation controls, typography resources, and Xmind import/export styling support.
Bundle canvas styles for preview and production, show marquee borders and selection fills, and align editor density with the project UI. Include interaction regression coverage and client comparison notes.
