Introduce an HTMX-powered results component and refactor Timeplotter flow: add component_timeplot_results controller action that supplies band/dxcc/cqzone defaults and renders a new timeplotter/component_results view. Revamp the index view to use Bootstrap cards, a filter form wired to HTMX (hx-post/hx-target/hx-trigger) and a results container that auto-loads on page load. Refactor assets/js/sections/timeplot.js: separate loading state, implement timeplotRender/timeplot helper functions, improve AJAX error handling, and add renderTimeplotFromComponent + htmx:afterSwap hook to initialize charts when the component is swapped in. Also update getTimes controller to rely on the model to output JSON directly.
