fix(pitch-deck): unit_cost rows show price not annual sum in Finanzplan

Einkaufspreis rows (Mac Mini/Studio) showed sum of 12 months (e.g. 38,400)
instead of the unit price (3,200). Now detected via section='unit_cost'
or label contains 'Einkaufspreis' and shows the price value instead.

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

pitch-deck/components/slides/FinanzplanSlide.tsx

@@ -517,9 +517,13 @@ export default function FinanzplanSlide({ lang, investorId, preferredScenarioId,
                 const isEditable = row.is_editable
                 // Balance rows show Dec value, flow rows show annual sum
                 const isBalanceRow = label.includes('Kontostand') || label === 'LIQUIDITÄT' || label === 'LIQUIDITAET'
+                const isUnitPrice = (row as Record<string, unknown>).section === 'unit_cost' || label.includes('Einkaufspreis')
 
                 let annual = 0
-                if (isBalanceRow) {
+                if (isUnitPrice) {
+                  // Unit prices: show the price, not a sum
+                  annual = values[`m${monthEnd}`] || values[`m${monthStart}`] || 0
+                } else if (isBalanceRow) {
                   // Point-in-time: show last month (December) value
                   annual = values[`m${monthEnd}`] || 0
                 } else {