Build a one-time API key reveal with Tailwind CSS: a warning-toned panel explaining the key will never be shown again, the key rendered in a monospace field masked by default with an eye toggle, a copy button that requires an explicit click, and a countdown (e.g. 60 seconds) after which the key value is replaced by a permanent placeholder. Track whether the key was copied and change the closing guidance accordingly ("Make sure you pasted it somewhere safe"), and keep the panel reachable by keyboard with the copy action announced.
提示词保持英文原文——直接粘贴进 Claude、Cursor、v0 或任何 AI 编程工具即可使用。