Summary

extractWikiLinksFromMarkdown in internal/links/helpers.go ran the [[Target]] wiki-link regex over the entire raw page content with no awareness of code blocks. As a result, bash [[ ... ]] test expressions inside fenced or inline code were parsed as wiki-links and produced spurious "Broken links" records.

This change excludes code spans and code blocks from wiki-link extraction by reusing the goldmark-AST exclusion machinery that already exists in the same package for the link-rewrite engine.

Why this matters

Saving a page whose body contains a bash code block such as:

if [[ -n "$computed_hash" && -n "$src_hash" ]]; then

previously generated false "Broken links" entries pointing at fragments like -n "$computed_hash" && -n "$src_hash" and "$src_hash" == sha256-* (reported in #1200). These are shell test expressions, not wiki-links, and should never have been indexed.

Changes

• internal/links/helpers.go: extractWikiLinksFromMarkdown now computes excluded code ranges once via NewMarkdownRefactorEngine().collectExcludedRanges(content) (the existing goldmark walk over *ast.CodeSpan / *ast.FencedCodeBlock / *ast.CodeBlock), switches from FindAllStringSubmatch to FindAllStringSubmatchIndex, and skips any match whose [[ start offset falls inside an excluded range via isExcludedOffset. Trimming, empty-skip, ordering, and dedup behavior for real wiki-links outside code is unchanged.
• internal/links/link_service_test.go: added regression tests for fenced bash code blocks (the exact error comes with certain text #1200 repro), inline code spans, mixed real-link-plus-code-block bodies, and indented code blocks.

Testing

go vet ./internal/links/...
go build ./...
go test ./internal/links/...

All pass. The new tests fail before the fix (the #1200 bash snippet yields two false targets) and pass after.

Note: this addresses the backend "Broken links" false-positive half of #1200. The separate client-side KaTeX preview parse error is rendered in the React/KaTeX frontend and is out of scope for this Go change.

Refs #1200