Add landing page, fix type errors, mark dynamic API route, and refactor user portrait page.
Co-authored-by: null <4804959+fnvtk@users.noreply.github.com>
Redesign navigation, home overview, user portrait, and valuation pages
with improved functionality and responsive design.
Co-authored-by: null <4804959+fnvtk@users.noreply.github.com>