fix(web): content: filter now respects regex mode

[brendan-kellam]

Summary

• content: prefix filters were always using substring matching, ignoring the regex toggle
• Patterns like content:next-auth.*beta searched for the literal string "next-auth.*beta" instead of treating it as a regex, returning no results
• ContentExpr now mirrors bare Term behavior: substring when regex is off, regexp when regex is on

Test plan

• With regex mode OFF: content:hello returns results for files containing the literal string hello
• With regex mode ON: content:next-auth.*beta returns results matching the regex pattern (e.g. files with "next-auth": "^5.0.0-beta.x")
• Bare terms still behave the same as before

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Fixed the content: filter to properly respect the regex toggle setting. When regex mode is enabled, content filtering now uses regex pattern matching; when disabled, it uses substring matching instead.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between da26b90 and 2eb00ee.

📒 Files selected for processing (2)

• CHANGELOG.md
• packages/web/src/features/search/parser.ts

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Walkthrough

The PR modifies the content filtering parser to conditionally handle regex-based or substring matching based on an isRegexEnabled flag. When enabled, the parser emits regexp-based IR; otherwise, it preserves the substring structure. A corresponding changelog entry documents this fix.

Changes

Cohort / File(s)	Summary
Documentation CHANGELOG.md	Added entry noting that the content: filter now respects the regex toggle.
Parser Logic packages/web/src/features/search/parser.ts	Modified ContentExpr handling to conditionally emit regexp-based IR when isRegexEnabled is true, or substring-based IR when false. Applied to both Term/QuotedTerm and ContentExpr branches under PrefixExpr.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch brendan/fix-content-expr-regex

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