fix: check if currentGroup is empty when split terminal

[winjo]

Types

• 🐛 Bug Fixes

Background or solution

🤖 Generated by Copilot at f8da187

• Add guard clause to prevent errors when terminal group is undefined (link)

没有 terminal 时如果在菜单点击 split terminal 会报错，此时再打开 terminal 无法创建新的 terminal，因此 split terminal 需要对 view group 进行非空判断

Changelog

🤖 Generated by Copilot at f8da187

Fix a bug that caused errors when executing terminal commands without a group. Add a guard clause to executeTerminalFrontendContribution in terminal.command.ts.

[opensumi]

ChatGPT Code Review:

该代码的修改是在 packages/terminal-next/src/browser/contribution/terminal.command.ts 文件中，修复了在没有可用的终端时点击分离（split）终端会报错的问题。解决方法是增加了一个对当前视图组是否为空的判断。如果为空就直接返回，不执行其他操作。这样即使没有终端可用时点击分离终端，也不会报错了。

可优化的地方是，对于分离终端时没有可用终端的情况，可以在界面上给予用户可视化的提示，而不是默默地忽略操作。

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (638f5d8) 57.72% compared to head (f8da187) 57.71%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2766      +/-   ##
==========================================
- Coverage   57.72%   57.71%   -0.01%     
==========================================
  Files        1327     1327              
  Lines       83585    83587       +2     
  Branches    17380    17381       +1     
==========================================
  Hits        48246    48246              
- Misses      32118    32119       +1     
- Partials     3221     3222       +1     

Flag	Coverage Δ
jsdom	52.71% <0.00%> (-0.01%)	⬇️
node	16.79% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
...-next/src/browser/contribution/terminal.command.ts	0.00% <0.00%> (ø)

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