Three issues fixed:
1. Kennzeichen normalization: DKV PDF extracts plates without hyphens
("GP JL 740E" vs CSV-imported "GP-JL 740E"). Added _normalizeKennzeichen()
which strips hyphens, spaces, and dots before lookup — resolves vehicle
master match failure that caused Marke/Modell/Fahrer to appear empty.
2. Empty-string NaN: parser used ?? '0' which doesn't catch empty strings,
causing parseDE('') = NaN. Changed to || '0' for km, menge, and totals.
3. Invalid km values: EV charging rows from DKV have misaligned columns —
km position contains a decimal price (e.g. 18.64 EUR or kWh). Added
sanity check: non-integer km values are written as null (empty cell)
instead of a misleading decimal. ExportRow.kilometerstand is now number|null.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
schalli
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