v1.3.1

What's New

• Regex filters — extract-mode filters now use regex matching instead of literal substring, consistent with search-mode's grep behavior
• OR syntax — use term1|term2|term3 to match any of multiple terms
• BRE compatibility — \| (grep-style OR) is automatically normalized to | so both syntaxes work
• Graceful fallback — invalid regex patterns fall back to literal matching instead of crashing