Feature Request: init and modules for app() and Fix Input Element Crash

Feature Request: init and modules for app() and Fix Input Element Crash: a task in LegoFlow-SWE (Harbor dataset). Currently, Hyperapp’s app() function lacks a way to run initialization logic with access to bound actions, and there is no built-in mechanism for composing modular state and actions…

The task

Currently, Hyperapp’s `app()` function lacks a way to run initialization logic with access to bound actions, and there is no built-in mechanism for composing modular state and actions. The old `events.load` and mixins were removed, leaving a gap. Additionally, a crash (`Uncaught TypeError: Cannot read property 'key'…

Part of Lego-X/LegoFlow-SWE.