🚀 : For the web app, enter key function to submit form

[xuelink]

It should be the same or similar logic with following code parts

https://github.com/langx/langx/blob/0ae1aa7463ba6ecb9e786a5b5a99beb20a0d8214/src/app/pages/home/messages/chat/chat.page.ts#L501-L507

https://github.com/langx/langx/blob/0ae1aa7463ba6ecb9e786a5b5a99beb20a0d8214/src/app/pages/home/messages/chat/chat.page.html#L124

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