dsh-simple-calc: Write the formula on paper, display directly after calculation

dsh-simple-calc is a DSH client plugin maintained by 6e6e6e (version 0.2.3, MIT) that brings the Fend calculation engine into the sidebar: one expression per line, variable assignment, unit conversion, percentages, currencies (Frankfurter exchange rates, 12-hour cache), dates, large numbers and bases; supports result copying and full-page export. The installation method is to install dsh-simple-calc.tgz from Releases in the plugin panel, with the URL pinned to the latest version. Note that it does not support solving equations, calculus, or matrices; dates are limited to the @YYYY-MM-DD format and do not participate in variable assignment. The plugin runs with DSH process permissions, so you should check the source code and license before installation.