feat(a3): Fehlermeldungen inline, verstaendlich, loesungsorientiert#81
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- Worker loescht Input-CSV nicht mehr -> Reprocess funktioniert wieder - Prozessor-Guard gegen One-Hot-Explosion (MAX_ONEHOT_UNIQUE) + Fehlerklasse K7 nennt betroffene Spalten - Rohes Fehler-Banner entfernt; Loading-State bei Retry zuverlaessig sichtbar - K7-Tests (79/79 gruen); A2-Roadmap-Notiz: 100%-unique Spalten proaktiv abwaehlen Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Ticket A3 – Fehlermeldungen inline, verständlich, lösungsorientiert
Umsetzung nach Design-Template „Wizard Error Handling", gegengecheckt mit
01_Results/fehlerklassen-ableitbarkeit.htmlundfehlerbehandlung-wizard-analyse.html. Enthält auch die Persistent-Result-Fixes aus A11 (P-S5-02/03).Was gemacht
Errorstatt bloßer String verworfen (data-processor.ts), damit die echte Ursache deninstanceof Error-Check überlebt;clearError()gegen den beim Wiedereinstieg klebenden Fehler.shared/constants/wizard-error-classes.ts(K1–K6) mit WHY/FIX/Zielschritt; Fallback für unbekannte Rohfehler; Hintergrund-Fehler → verwerfbare Warnungen.shared/wizard-issue-card/(Schweregrad-Icon, Klassen-Badge, WHY/FIX, einklappbare technische Details, „Fix in Schritt N"-Button, optional Dismiss).ngOnInitstellt Ergebnis/Fehler nach Wiedereinstieg wieder her (P-S5-02/03).Manuelle Testschritte (Schritt → Location → Erwartung)
Build:
npm run builderfolgreich (nur vorbestehende Bundle-Budget-Warnung).