fix: prevent Ctrl+Enter to spamming posts

[xnuk]

everyday i press ctrl+enter in staging.bsky.app it sends 1000+ of same posts => so i temporaily ip banned => later i delete that spam posts => i temporaily ip banned => again

at://did:plc:vuwg6b5ashezjhh6lpnssljm/app.bsky.feed.post/3jvqn4idly52j

This solves this thing but in a bit of dirty way.

1. onPressPublish in handleKeyDown is never changed, because useEditor only depends on modeClass.
2. Also depending onPressPublish or richtext is impractical because it seems to reload the entire editor.
3. So this PR tries to get latest values, on Ctrl+Enter pressed.

[pfrazee]

I tried to reproduce the "post spam" issue on chrome, firefox, and safari and was unable to, using either cmd+enter or ctrl+enter. Is this still an issue?

[xnuk]

Good thing is, spamming Ctrl+Enter also can spam same posts. Firefox 115 in Arch Linux x64.

spam.mp4

Is this still an issue?

Creating my new account now to reproduce it

[xnuk]

Still reproducible. Firefox 115 on Windows 10 + 날개셋 10.0 IME, Ctrl+Enter is pressed just once.

bandicam.2023-06-15.10-38-08-341.mp4

@pfrazee

[omergulen]

Also, since we are already on it, would you mind preventing Ctrl+Enter to add new line please? I have never seen this behavior before on any other Chat or post inputs, Ctrl+Enter should trigger the post submit and there shouldn't be new line added in the UI (even though it is not posted).