Captures the UX gap — a scoped scene that filters out everything shows
the generic "Keine Treffer" with no hint that the scope is the reason
or how to clear it. Plan lays out a minimal Phase 1 (shared
ScopeEmptyState component + clearSceneScope helper, ~10 LOC per
ListView) with optional Phase 2/3 extensions. No code yet.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
