feat(a2): Smart Defaults erweitern (A2-Nachtrag) - Hochkardinalitaet Schritt 2 + colorFeature#85
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TBum1404 merged 1 commit intoJul 22, 2026
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…uegerer colorFeature-Default A2-Nachtrag (Hoch + Mittel): - Hochkardinalitaets-Heuristik: Text/Categorical/ID-Spalten mit >=90% einzigartigen Werten (und >20 Zeilen) starten abgewaehlt; Numeric/Date ausgenommen. isHighCardinality + issueDescription in preprocessing.service.ts - Schritt 2: expliziter 'Auto-deselected'-Marker mit Begruendung (issueDescription) getrennt vom Qualitaets-Warnicon; Tipp-Text erweitert um 100%-Unique/Reaktivierung - Schritt 4: colorFeature-Default waehlt niedrig-kardinales Kategoriemerkmal, sonst varianzstaerkste Numeric, statt columns[0]; Hinweis im Erklaertext - 7 Unit-Tests fuer die Auto-Deselect-Heuristik
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Setzt den A2-Nachtrag aus der ROADMAP um (Ticket A2, Abschnitt „Nachtrag (TODO) — Smart Defaults erweitern"). Umfang Hoch + Mittel.
Was
Hoch — Hochkardinalität in Schritt 2
isHighCardinalityinservices/preprocessing.service.ts: Text/Categorical/ID-Spalten mituniqueCount/count >= 0.9undcount > 20starten abgewählt. Numeric/Date ausgenommen (near-unique ist dort legitim).createDefaultColumnConfigsetztenabledund eineissueDescription(Grund der Abwahl).hasIssuesbleibt auf Datenqualität (mostly-missing / konstant) beschränkt.Hoch — sichtbare Kennzeichnung (Schritt 2)
step2-column-selection).Mittel — klügerer colorFeature-Default (Schritt 4)
pickDefaultColorFeature: bevorzugt ein niedrig-kardinales Kategorie-/Boolean-Merkmal, sonst die varianzstärkste Numeric, erst zuletztcolumns[0]. Hinweis dazu imcolorFeature-Erklärtext.Tests
preprocessing.service.spec.ts). Gesamt 157/157 grün, Build ok (nur vorbestehende Bundle-Budget-Warnung).Manuelle Testschritte