fix(pitch-deck): Investitionen tab shows values (was empty due to values_invest field)

getValues() now reads values_invest for investment rows.
Previously only read values/values_total/values_brutto, missing the
invest-specific field name.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pitch-deck/components/slides/FinanzplanSlide.tsx

@@ -81,7 +81,7 @@ function LabelWithTooltip({ label }: { label: string }) {
 }
 
 function getValues(row: SheetRow): Record<string, number> {
-  return row.values || row.values_total || row.values_brutto || {}
+  return row.values || row.values_total || row.values_brutto || (row as Record<string, unknown>).values_invest as Record<string, number> || {}
 }
 
 function formatCell(v: number | undefined): string {