Caprock Files

Fixed

• Shift+Enter really does insert a newline now. 0.39.1 sent the right bytes and still submitted, because the bytes were only half of it: returning false from the key handler stops xterm interpreting the key, but the browser still delivers it to xterm's hidden textarea, which emits its own carriage return. The socket carried ESC CR and then a bare CR immediately after — [27,13] followed by [13] — and Claude Code submitted on the second one.

The keys now call preventDefault, so the textarea never sees them. Four attempts at this bug and the first three were all arguments about which sequence to send; nothing was watching what else went down the wire afterwards.