[BUG] `config.diff_opts.open_in_current_tab` doesn't work

[alex35mil]

Bug Description

When I set config.diff_opts.open_in_current_tab = false, I expect diff to open in a new tab, but this setting doesn't make any difference - the diff always opens in the current tab.

To Reproduce

Try to set the option to different values and make a diff pop up.

Expected Behavior

With config.diff_opts.open_in_current_tab = false, two diff buffers should pop up in a new tab.

Environment

• Neovim version: v0.11.2
• Claude Code CLI version: 1.0.58
• OS: macOS 15.5
• Plugin version: "claudecode.nvim": { "branch": "main", "commit": "91357d810ccf92f6169f3754436901c6ff5237ec" }

[ThomasK33]

Hey @alex35mil, thanks for opening this issue.

You're right; some leftover dead code wasn't cleaned up properly.

I've pushed a PR (#111) that should reintroduce this feature under the diff_opts.open_in_new_tab boolean.

Please let me know if the changes on the PR's branch work for you.