Make the filter buttons fetch data

The filter button -- year and fuel type do not fetch any data when clicked, link them in a way such that when filtered the catalogue updates.

Start by locating the year and fuel-type filter buttons and the code that loads the catalogue. Trace what happens when each button is clicked, then verify that applying either filter fetches the relevant data and refreshes the displayed catalogue.

由索引模型根据 Issue 内容生成。