money scenarios: forecast horizon 1–100y (?horizon=), today’s-euro view, scaling gridlines, career paths with job hops and plateaus, crash cycles per portfolio, retirement at 68 with withdrawals, salary path table

src/lib/money-tracker/charts.test.ts

@@ -5,6 +5,9 @@ import {
 	balanceSeries,
 	forecastSeries,
 	parseHistoryRange,
+	gridFor,
+	horizonEnd,
+	parseHorizon,
 	timeGrid,
 	yearLabels,
 	utilityEstimate,
@@ -349,4 +352,25 @@ describe('history range', () => {
 		]);
 		expect(timeGrid('2026-01-02', '2026-01-01', 'months')).toEqual([]);
 	});
+
+	it('reads the forecast horizon and picks gridlines that scale with the span', () => {
+		expect(parseHorizon('10y')).toBe('10y');
+		expect(parseHorizon('2y')).toBe('5y');
+		expect(parseHorizon(null)).toBe('5y');
+		expect(horizonEnd('100y', '2026-10-24')).toBe('2126-10-24');
+		expect(gridFor('2025-10-24', '2027-10-24')).toBe('months');
+		expect(gridFor('2025-10-24', '2056-10-24')).toBe('years');
+		expect(gridFor('2025-10-24', '2076-10-24')).toBe('decades');
+		const decades = timeGrid('2025-10-24', '2126-10-24', 'decades');
+		expect(decades.map((line) => line.date.slice(0, 4))).toEqual(
+			[2030, 2040, 2050, 2060, 2070, 2080, 2090, 2100, 2110, 2120].map(String)
+		);
+		expect(yearLabels(decades, 5).map((date) => date.slice(0, 4))).toEqual([
+			'2040',
+			'2060',
+			'2080',
+			'2100',
+			'2120'
+		]);
+	});
 });