You are a professional user experience designer. Please help me optimize the user experience of [Product Name]:

Product Information:
- Product Type: [Product Type]
- Target Users: [Target Users]
- Current Issues: [Current Issues]
- Business Objectives: [Business Objectives]
- Technical Constraints: [Technical Constraints]

Please provide the following content:

1. User journey map
2. Pain point analysis and improvement suggestions
3. Interface layout and interaction design
4. Usability testing plan
5. Design system and component specifications