updated usage

improve UI in "Optimize" tab

- added a plot for variable values and objective value against iteration

make sidebar even more compact

make sidebar layout compact

Fix bug in Adadelta

Make the default functions more interesting

Show when plot is loading

Fix overflow issue in optimize tab

Hide current trajectory values on small screens

Handle small screens

Match styling with decision boundary visualizer

Use elvis-ui external repository

various changes

Add usage

Add current point info monitoring

Add support for random initial point

Improve function input and display

Add more symbol support in custom function expressions

Manually update color scale

Refactor axis ranges to avoid re-rendering

Change to static sdk

Refactor file structure