fix: Allow bracket characters in repo path validation

[sentry]

This PR updates the REPO_PATH_SEGMENT_PATTERN regex in src/utils/repo-path.ts to include [, ], (, and ) characters.

TanStack Router uses these characters for file-based routing conventions, such as escaping literal dots ([.]) and defining route groups ((group)). Previously, the path validation would reject legitimate example file paths containing these characters, leading to an "Error: [" issue when trying to load such examples.

This change ensures that valid router-convention paths are correctly processed. It does not introduce any security vulnerabilities as existing checks for path traversal (e.g., .., //, leading/trailing /) remain in place.

Fixes TANSTACK-COM-4ZF

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	7add39f	Commit Preview URL Branch Preview URL	Sep 09 2026, 11:04 AM