Peter Meier
2d85681252
The widget rendered "Keine gültigen Live-Werte" the moment SMARD's load filter (id 410) lagged behind the production filters by even one slot — the aggregator coalesced "filter unavailable" with "filter returned 0" and the percent calculation refused to divide by zero. Three changes: 1. SmardSnapshot.values now uses `number | null` so callers can tell "filter genuinely missing" apart from "filter reported zero" (e.g. solar at night, decommissioned nuclear). 2. Aggregator pulls Energy-Charts (CMS strommix_de) in parallel and uses it as a per-field fallback for any SMARD null. New `dataSource: "smard+energy-charts"` flag travels in the response so the attribution stays honest. Pure SMARD when everything resolves; pure Energy-Charts when SMARD is entirely down; the hybrid label for the common case where only load drops out. 3. Widget renders the production breakdown + context row + price row even when the percentage is unavailable, with a clear "Lastwert von SMARD gerade nicht verfügbar" hint instead of going blank.