Extension installation fails from non-GitHub git servers

[d191]

What happened?

When trying to install an extension from a self-hosted git server (e.g., GitLab, Bitbucket, Gitea), the installation fails after confirmation with the error:

Invalid GitHub repository source: https://gitlab.company.com/owner/repo. Expected "owner/repo" or a github repo uri.

Steps to reproduce:

1. Run: qwen extensions install https://gitlab.company.com/team/my-extension
2. Confirm installation when prompted
3. Observe the error

What did you expect to happen?

The extension should install successfully using the git URL as the source.

Client information

Client Information

Qwen Code                         0.12.6 (ac30c98a2)
Runtime                           Node.js v24.14.0 / npm 11.9.0
OS                                linux x64 (6.6.87.2-microsoft-standard-WSL2)

Login information

No response

Anything else we need to know?

Root cause: The getExtensionId function calls parseGitHubRepoForReleases() which only supports GitHub URLs.
Fix: wrap in try-catch to fall back to source URL for non-GitHub servers.