[Bug] Auto clipboard copy in TUI prevents manual paste

[gongjieliu]

Description

OpenCode TUI automatically copies selected text to clipboard (likely via xclip/xsel), but this breaks manual paste functionality because:

1. On headless servers without X11 display, xclip fails with errors
2. Even when xclip works, the copied content cannot be pasted in OpenCode dialogs
3. This makes it impossible to use AI-generated code/response

Environment

• OpenCode version: TUI
• Run on server without X11 display

Steps to reproduce

1. Start OpenCode TUI (likely any platform)
2. Wait for AI to generate response
3. Try to select/copy text - it auto-copies
4. Try to paste - nothing happens

Expected behavior

• Allow manual copy/paste OR
• Allow disabling auto-copy OR
• Fix clipboard integration for server environments

Potential solution

• Add option to disable auto-copy in config
• Or improve clipboard handling for headless/server environments
• Or improve error handling so it doesn't silently break

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Feature Request] Add config option to disable copy-on-select behavior #10490: Feature request to add config option to disable copy-on-select behavior (same root cause)
• [FEATURE] Add option to disable copy-on-select behavior #15941: Feature request to add option to disable copy-on-select behavior
• Copy and Paste behaviour under Linux #4754: Copy and paste behaviour under Linux — covers clipboard buffer conflicts and auto-copy overwriting the wrong buffer, which closely matches this report
• Copy To Clipboard is not working #4283: Copy to clipboard is not working (general clipboard bug)

If your issue is specifically about copy-on-select overwriting the clipboard and/or being unable to paste back into OpenCode, it overlaps significantly with the above. Please check if those cover your case before this is investigated further.