VS Code keybindings set by `/terminal-setup` incompatible with Claude Code

[JeffreyCA]

Describe the bug

Keybindings set by Copilot CLI (/terminal-setup):

    {
        "key": "ctrl+enter",
        "command": "workbench.action.terminal.sendSequence",
        "when": "terminalFocus",
        "args": {
            "text": "\\\r\n"
        }
    },
    {
        "key": "shift+enter",
        "command": "workbench.action.terminal.sendSequence",
        "when": "terminalFocus",
        "args": {
            "text": "\\\r\n"
        }
    },

Keybindings set by Claude Code:

    {
        "key": "shift+enter",
        "command": "workbench.action.terminal.sendSequence",
        "when": "terminalFocus",
        "args": {
            "text": "\u001b\r"
        }
    },

When set to \\\r\n, pressing shift+enter in Claude Code results in extra backslash characters (\) being inserted.

Consider changing it to \u001b\r, which seem to work properly in both tools.

Affected version

0.0.374

Additional context

Running on Windows machine, in VS Code integrated terminal inside of a Linux Dev Container

Related bug: #657