fix(web): open the file a bare filename reference names

[Brechard]

Fixes #6292.

Clicking ChatView.tsx:3301 fails with "Failed to read workspace file 'ChatView.tsx'". The :line suffix is what makes it a link, but the filename alone doesn't say where the file is, so it resolves against the workspace root.

When a path has no directory in it, this asks the workspace index where the file actually is before opening the panel. Only an exact filename match counts — a fuzzy match on some other file would be worse than the error you get today, so anything else keeps the old path and the old message. Paths that already carry a directory skip the lookup entirely and open synchronously, as before.

Two lookups can be in flight at once and the index makes no promise about the order it answers in, so each one claims a sequence and drops its result if a later click superseded it.

No screenshots: the visible change is a chip that used to open an error page now opening the file.

🤖 Generated with Claude Code

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Note

Low Risk
Focused UX bugfix for chat file links with conservative exact-match logic and unit tests; no auth, security, or data-handling changes.

Overview
Bare filename links in chat markdown now resolve to a real workspace path before opening the right panel, fixing clicks like ChatView.tsx:3301 that previously failed against the workspace root.

When the path has no directory segment, openFileInPanel queries projectEnvironment.searchEntries and opens only an unambiguous exact (or single case-insensitive) basename match. Paths that already include a directory still open synchronously. Concurrent lookups are sequenced so a later click wins if an earlier search settles out of order.

MarkdownFileLink now takes an onOpenInPanel callback instead of calling the right-panel store directly.

^{Reviewed by Cursor Bugbot for commit dcb40ad. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Resolve bare filename references to project file paths when opening files from chat links

• When a file link in chat references a bare filename (no directory separator), the new openFileInPanel callback in ChatMarkdown.tsx queries the project index to find a matching file path.
• Match selection prefers an exact basename match, falls back to a unique case-insensitive match, and uses the original path if ambiguous or unresolved.
• Concurrent rapid clicks are handled via claimWorkspaceBasenameLookup in workspaceBasenameLookup.ts, ensuring only the latest click's lookup result is applied.
• MarkdownFileLink now accepts an onOpenInPanel callback instead of calling the right panel store directly, making the open logic configurable by the parent.

^{Macroscope summarized dcb40ad.}

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[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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[macroscopeapp]

Approvability

Verdict: Approved dcb40ad

This bug fix corrects bare filename opening behavior with well-tested, self-contained helper functions. The change has clear intent, limited scope, and comprehensive test coverage.

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