dsh-approval-hotkeys: Enter / Esc hotkeys for DSH interactive panel

dsh-approval-hotkeys is a pure client-side browser extension for DeepSeek Harness (DSH), maintained by SiriLee and licensed under the MIT License. This plugin aims to improve interaction efficiency via keyboard shortcuts, allowing users in panels such as Approval, Tool Questioning, and Plan Review to execute confirm actions (e.g., Allow once, Submit, Approve) using the Enter key and cancel actions (e.g., Reject, Discard, Decline, or Discuss) using the Esc key. It requires no configuration and functions by listening to document-level keydown events to simulate clicks on corresponding buttons, while also incorporating safeguards against accidental triggers, such as ignoring keystrokes in input fields, ignoring key combinations, and checking if the focus is already on a button.