[Feature]: Configurable copy-on-select delay

[scottrych]

Feature description

Problem

When I select text in Wave Terminal using either:

• Dragging with Magic Trackpad
• Double-click or triple-click selection

There's a noticeable delay before the selected text appears in the clipboard. The
delay makes the copy-on-select feature feel sluggish compared to other terminals.

Desired Behavior

Add a configurable setting (e.g., term:copyselectdelay) to allow users to adjust or
eliminate the delay between text selection and clipboard copy.

Current Behavior

Text is copied to clipboard after selection, but with a delay that feels slower than
expected.

Environment

• Wave Terminal Version: 0.14.4 (beta, build 202603271721)
• OS: macOS
• Current Setting: term:copyonselect: true

Suggested Solution

Add a new configuration option in ~/.config/waveterm/settings.json:
"term:copyselectdelay": 0
Where the value is in milliseconds (0 = immediate, or allow disabling the delay
entirely).

Implementation Suggestion

No response

Anything else?

No response