Rework real estate model: purchase price + mortgage + amortization only, no appreciation; amortization counts against savings quota; sale price/tax entered at transition time with correct mortgage payoff; carry over income/expenses to new phases

src/app/api/phases/[phaseId]/route.ts

@@ -23,12 +23,10 @@ const securitySchema = z.object({
 });
 const realEstateSchema = z.object({
   name: z.string().min(1),
-  marketValue: z.number(),
+  // Muss zwingend angegeben werden (siehe Anforderung: Kaufpreis ist Pflichtfeld).
+  purchasePrice: z.number().positive("Kaufpreis muss groesser als 0 sein."),
   mortgage: z.number(),
-  valueGrowth: z.number(),
   amortization: z.number(),
-  salePrice: z.number().nullable().optional(),
-  saleTaxRate: z.number().min(0).max(100),
 });
 const oneTimeEventSchema = z.object({
   type: z.enum(["INCOME", "EXPENSE"]),
@@ -96,7 +94,7 @@ export async function PUT(
         incomeEntries: { create: data.incomeEntries.map((e) => ({ ...e, label: e.label ?? null, personId: e.personId ?? null })) },
         expenseEntries: { create: data.expenseEntries.map((e) => ({ ...e, label: e.label ?? null })) },
         securities: { create: data.securities },
-        realEstates: { create: data.realEstates.map((re) => ({ ...re, salePrice: re.salePrice ?? null })) },
+        realEstates: { create: data.realEstates },
         oneTimeEvents: { create: data.oneTimeEvents.map((e) => ({ ...e, description: e.description ?? null })) },
         retirementInfos: { create: data.retirementInfos },
       },