Switch dashboard terminal to Ghostty

[matthewlouisbrockman]

switches ghostty for xterm; opencode template looks better on it

downside: no mouse, but that's ok. mice are silly.

[cursor]

PR Summary

Medium Risk
Core terminal UX and PTY resize behavior change with a new WASM/async dependency; paste sanitization affects what reaches the shell.

Overview
Replaces @xterm/xterm with ghostty-web (and strip-ansi) for the dashboard sandbox terminal. use-terminal-instance now async-loads Ghostty, uses FitAddon for layout, and shows a plain-text message if init fails.

PTY sizing in terminal-size uses the emulator’s cols/rows when present instead of measuring xterm DOM cells. terminal-paste sanitizes clipboard text (ANSI and control chars stripped); paste is handled on the terminal panel via onPasteCapture and forwarded to the PTY.

Unit tests cover the new sizing behavior and sanitizeTerminalPaste.

^{Reviewed by Cursor Bugbot for commit 392ddd7. Bugbot is set up for automated code reviews on this repo. Configure here.}

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Project	Deployment	Actions	Updated (UTC)
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[chatgpt-codex-connector]

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[matthewlouisbrockman]

don't need this anymore, fixed with webgl