Format all monetary amounts as 1'000-separated integers and round amount inputs to nearest 1'000

src/components/WealthChart.tsx

@@ -11,6 +11,7 @@ import {
   XAxis,
   YAxis,
 } from "recharts";
+import { formatChf } from "@/lib/format";
 import type { PlanComputed } from "@/lib/calculations";
 
 export interface TimelineSeries {
@@ -67,11 +68,7 @@ export function WealthChart({ series }: { series: TimelineSeries[] }) {
             tick={{ fontSize: 11 }}
             tickFormatter={(v) => Intl.NumberFormat("de-CH", { notation: "compact" }).format(v)}
           />
-          <Tooltip
-            formatter={(v) =>
-              typeof v === "number" ? v.toLocaleString("de-CH", { maximumFractionDigits: 0 }) : v
-            }
-          />
+          <Tooltip formatter={(v) => (typeof v === "number" ? formatChf(v) : v)} />
           <Legend wrapperStyle={{ fontSize: 12 }} />
           {primary.boundaries.slice(1).map((b) => (
             <ReferenceLine key={b.year} x={b.year} stroke="#a1a1aa" strokeDasharray="2 2" />