Fix LocalGitCredentialsHelper parsing of IP:port Git remote URLs

[Copilot]

Swift's URL(string:) fails to parse Git remote URLs like 192.1.1.1:3000/repo.git or forgejo.local:3000/repo.git, causing UnsupportedRemoteURL errors when pushing to self-hosted Git instances. These URLs work with libgit2 directly (terminal lg2 push succeeds) but fail in the credentials helper.

Changes

• Added normalizeRemoteURL() static helper method to LocalGitCredentialsHelper to detect and fix bare IP:port or hostname:port patterns by prepending http:// scheme before URL parsing
• Updated credentialsForRemote() to use normalizeRemoteURL before parsing remote URLs
• Updated onClone() in SourceControlContainer to use normalizeRemoteURL for user-provided URLs during clone operations
• Added comprehensive tests for URL normalization in CodeUITests covering all URL format scenarios
• Preserves existing behavior for scp-like syntax (git@host:path) and fully-qualified URLs (https://host/path)

The fix is applied consistently across all Git URL parsing points to ensure IP:port URLs work for push, pull, fetch, and clone operations.

Example

// Before: URL(string: "192.1.1.1:3000/repo.git") → nil (throws UnsupportedRemoteURL)
// After:  normalizeRemoteURL("192.1.1.1:3000/repo.git") → "http://192.1.1.1:3000/repo.git"
//         URL(string: "http://192.1.1.1:3000/repo.git") → valid URL with host/port

Handles all URL formats:

• Bare IP:port → adds http:// prefix
• Hostname:port → adds http:// prefix
• SCP-like (git@host:path) → preserved unchanged
• Full URLs with schemes → preserved unchanged

Testing

• ✅ Added unit tests for all URL normalization scenarios
• ✅ Manual verification confirms IP:port URLs now parse correctly
• ✅ Existing parseRemoteURL tests still pass
• ✅ Code review passed with no issues

Original prompt

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This section details on the original issue you should resolve

<issue_title>Code.LocalGitCredentialsHelper.HelperError error 0 - selfhosted forgejo</issue_title>
<issue_description>Hello, I've been troubleshooting for the past couple days and failing. I keep getting the error in the title when attempting to push to my private instance of forgejo.

I'm able to clone a repo via link. I've tried my password credentials and personal tokens.

I am able to push to github. And I'm able to push using a different git app once it prompts to remove SSL.

I do have local network active. I've tried making fresh repos to test, I've tried a complete fresh install of the docker running the instance, I've tried deleting config files.

( EDIT: I am able to run lg2 push and then entering my username and token and successfully push from the terminal. But via the gui I cannot)

I'm not really sure what else to do and so am hoping someone can point me in the right direction to fix the issue.

I was able to successfully push to my repo at first when using the app - but I broke it somehow and no amount of troubleshooting seems to be able to fix it sadly :(

</issue_description>

<agent_instructions>Analze the issue to see why LocalGitCredentialsHelper failed to parse IP style git addresses. Give suggestions to fix the issues in the issue thread. Do not touch the codebase yet</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@bummoblizard Hi. LocalGitCredentialsHelper.HelperError refers to UnsupportedRemoteURL. That means the git remote url is malformed. Please check the content of .git/config for any malformed urls. Alternatively, try re-cloning the repository and start fresh. @bummoblizard Yep, that seems to be the reason. Swift's URL(init: String) couldn't seem to parse "192.1.1.1:1000". Could you share your .git/config for me to verify? @bummoblizard Adding a git:// prefix to the local ip address in .git/config should work @bummoblizard Thanks for letting me know. I will take a look again and fix the problem soon

• Fixes Code.LocalGitCredentialsHelper.HelperError error 0 - selfhosted forgejo #1294

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[bummoblizard]

@copilot Make the changes. Make sure normalizeRemoteURL is used consistently whenever git URL parsing is needed.

[Copilot]

@copilot Make the changes. Make sure normalizeRemoteURL is used consistently whenever git URL parsing is needed.

Implemented in commit 41b07ee. The normalizeRemoteURL() method is now used consistently in:

• credentialsForRemote() for remote operations (push/pull/fetch)
• onClone() for repository cloning

This fixes IP:port URLs like 192.1.1.1:3000/repo.git and forgejo.local:3000/repo.git by adding http:// prefix before parsing, while preserving existing behavior for SCP-like syntax and fully-qualified URLs.