Cmd+A should select input line text, not entire terminal output #2221

Problem

When pressing Cmd+A in a terminal pane, it selects the entire terminal output — all scrollback history, previous responses, everything. This makes Cmd+A unusable for its most common purpose: quickly selecting and replacing the current input text.

In virtually every text input on macOS (text editors, browser address bars, search fields, chat inputs), Cmd+A selects the contents of the focused input — not the entire page. The terminal input line should follow this convention.

Expected Behavior

When the cursor is in the terminal input line:

• Cmd+A selects only the text on the current input line (the command being typed)
• This lets you quickly overwrite your input by just typing, or delete it with Backspace

Current Behavior

• Cmd+A selects all visible terminal output (scrollback + responses + input), as shown in the attached screenshot

Screenshot

Why This Matters

This is a frequent interaction — you start typing a command, change your mind, and want to clear the input. Right now you have to hold Backspace or manually click-drag to select. Cmd+A → type replacement is muscle memory for most macOS users.

Environment

• Superset version: 1.1.2
• OS: macOS 15.5