Enhance chat UI with thinking content, performance, and error handling

What's Changed

• This change addresses scroll performance, new feature implementation and refactoring (e.g., adding expandable thinking content for better user experience in chat messages).
• Key improvements include bug fixes for completion messages, updating error messages for clarity, enhancing chat page scrolling logic, and introducing a new component for expandable thinking content.

Impact

Describe the impact of these changes on the codebase:

• Does this change introduce any breaking changes? No breaking changes; updates are additive and improve UX without altering existing functionality.
• Are there any dependency updates? The version in package.json has been bumped from 0.10.2 to 0.10.3, indicating potential minor dependency or feature updates.
• Are there any performance or security implications? Improved UI responsiveness with new scrolling logic; security considerations are addressed by maintaining existing safe practices in message handling.

PRs

• feat: Enhance chat UI with thinking content and error handling by @damianvtran in #60

Full Changelog: v0.10.2...v0.10.3