CMD+Ito trigger completion
You can assign preferred shortcuts (Tab and Shift-Tab or whatever keys you like) to Select Next Completion Option and Select Previous Completion Option actions in Settings | Keymap and remove the assignment of Tab to Choose Lookup Item Replace.
please try changing Add for JSX attributes: value in Settings | Editor | Code Style | HTML | Other to either Quotes or Based on type - this should help
- Paste json to generate
- Use refactor and context action to do more.