fix(web): Fix 404 error when clicking "Open in GitLab"

[brendan-kellam]

Fixes #845

Summary by CodeRabbit

• Bug Fixes
  • Improved branch reference handling in code browse URLs to ensure proper formatting across all supported Git platforms (GitHub, GitLab, Gitea, Azure DevOps, Bitbucket, Gerrit, and others). Ensures reliable links when navigating to code at specific branches.

[coderabbitai]

Walkthrough

Bug fix that sanitizes branch references in URL construction by stripping refs/heads/ and refs/tags/ prefixes before building code host browse URLs, resolving URL path issues in GitLab and other platforms.

Changes

Cohort / File(s)	Summary
URL Sanitization packages/web/src/lib/utils.ts	Renamed branchName parameter to _branchName in getCodeHostBrowseAtBranchUrl and getCodeHostBrowseFileAtBranchUrl. Added internal logic to strip Git reference prefixes (refs/heads/, refs/tags/) from the branch name before constructing URLs, ensuring proper URL formatting across all code host types.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the bug fix addressing the 404 error in GitLab URL generation when using the 'Open in GitLab' feature, directly matching the linked issue #845.
Linked Issues check	✅ Passed	The code changes strip 'refs/heads/' and 'refs/tags/' prefixes from branch names before constructing URLs, directly addressing the root cause of issue #845 where invalid URL segments were being generated.
Out of Scope Changes check	✅ Passed	All changes are scoped to fixing the branch name sanitization in URL generation functions, with no extraneous modifications present.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch bkellam/fix-SOU-346

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[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.