Rework core model: financial elements as plan-wide entities across phases; derived phase types (Erwerb/Pension/Misch) with retirement-capped durations and per-plan retirement age; AHV (gap years + couple ceiling), PK payout/annuity, 3a, real estate, other assets/debts; horizontal timeline with retirement markers; phase x element matrix with detail panel; savings/consumption quota + available-capital key figures with red status

src/app/api/plans/[planId]/route.ts

@@ -1,4 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
 import { prisma } from "@/lib/db";
 import { toHouseholdInput, toPlanInput, getHouseholdOrNull, getOwnedPlan } from "@/lib/queries";
 import { getCurrentUserId } from "@/lib/session";
@@ -9,19 +10,14 @@ export async function GET(
   { params }: { params: Promise<{ planId: string }> }
 ) {
   const userId = await getCurrentUserId();
-  if (!userId) {
-    return NextResponse.json({ error: "Nicht authentifiziert." }, { status: 401 });
-  }
+  if (!userId) return NextResponse.json({ error: "Nicht authentifiziert." }, { status: 401 });
   const { planId } = await params;
+
   const household = await getHouseholdOrNull(userId);
-  if (!household) {
-    return NextResponse.json({ error: "Kein Haushalt vorhanden." }, { status: 400 });
-  }
+  if (!household) return NextResponse.json({ error: "Kein Haushalt vorhanden." }, { status: 400 });
 
   const plan = await getOwnedPlan(planId, userId);
-  if (!plan) {
-    return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
-  }
+  if (!plan) return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
 
   const householdInput = toHouseholdInput(household);
   const planInput = toPlanInput(plan);
@@ -30,19 +26,47 @@ export async function GET(
   return NextResponse.json({ plan: planInput, computed });
 }
 
+const patchSchema = z.object({
+  name: z.string().min(1).max(120).optional(),
+  retirementAgeA: z.number().int().min(30).max(100).nullable().optional(),
+  retirementAgeB: z.number().int().min(30).max(100).nullable().optional(),
+});
+
+export async function PATCH(
+  request: NextRequest,
+  { params }: { params: Promise<{ planId: string }> }
+) {
+  const userId = await getCurrentUserId();
+  if (!userId) return NextResponse.json({ error: "Nicht authentifiziert." }, { status: 401 });
+  const { planId } = await params;
+
+  const plan = await prisma.plan.findFirst({ where: { id: planId, household: { userId } } });
+  if (!plan) return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
+
+  const body = await request.json();
+  const parsed = patchSchema.safeParse(body);
+  if (!parsed.success) return NextResponse.json({ error: "Ungueltige Eingabe." }, { status: 400 });
+
+  const updated = await prisma.plan.update({
+    where: { id: plan.id },
+    data: {
+      name: parsed.data.name ?? undefined,
+      retirementAgeA: parsed.data.retirementAgeA === undefined ? undefined : parsed.data.retirementAgeA,
+      retirementAgeB: parsed.data.retirementAgeB === undefined ? undefined : parsed.data.retirementAgeB,
+    },
+  });
+  return NextResponse.json({ plan: { id: updated.id, name: updated.name } });
+}
+
 export async function DELETE(
   _request: NextRequest,
   { params }: { params: Promise<{ planId: string }> }
 ) {
   const userId = await getCurrentUserId();
-  if (!userId) {
-    return NextResponse.json({ error: "Nicht authentifiziert." }, { status: 401 });
-  }
+  if (!userId) return NextResponse.json({ error: "Nicht authentifiziert." }, { status: 401 });
   const { planId } = await params;
   const plan = await prisma.plan.findFirst({ where: { id: planId, household: { userId } } });
-  if (!plan) {
-    return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
-  }
+  if (!plan) return NextResponse.json({ error: "Plan nicht gefunden." }, { status: 404 });
   await prisma.plan.delete({ where: { id: plan.id } });
   return NextResponse.json({ ok: true });
 }