Add `time_start` initialization and `uptime_seconds`/`uptime` properties to the Application class, including a `_format_uptime` helper that converts seconds into a human-readable string with days, hours, minutes, and seconds. Introduce a new `DumbTerminal` custom element in `dumb-term.js` with a retro terminal UI, command history navigation, and a shadow DOM-based layout. Additionally, reformat multiple JavaScript files (app.js, chat-input.js, chat-window.js, event-handler.js, fancy-button.js) to use consistent 2-space indentation and double quotes, and remove trailing whitespace from license comments.
BordedDev
a83452b3f6