Converts a raw filename into a human-readable title candidate by
stripping the extension and replacing underscore/hyphen runs with spaces.
Reuses the existing stripExtension() helper.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace the four fixed regexes with a split-based algorithm:
- first segment = date → last segment = firstName, rest = lastName parts
- last segment = date → second-to-last = firstName, rest = lastName parts
18881025_de_Gruyter_Walter.pdf now correctly yields "Walter de Gruyter".
Simple two-segment names behave identically to before.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Supports four patterns: date_lastname_firstname and lastname_firstname_date,
both with ISO (YYYY-MM-DD) and compact (YYYYMMDD) date formats.
Returns dateIso, personName and a formatted suggestedTitle.
Partial matches are rejected — unrecognised filenames return {}.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>