Add onboarding weather and template gradients

test/weather-forecast.test.js

@@ -0,0 +1,38 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const { fetchWeatherLocationForecast } = require('../src/data/weather');
+
+test('Open-Meteo hourly forecast starts at the current hour and spans 24 hours', async () => {
+  const originalFetch = global.fetch;
+  const originalDateNow = Date.now;
+  let requestUrl;
+  global.fetch = async function (url) {
+    requestUrl = new URL(url);
+    return { ok: true, json: async function () { return { hourly: { time: [] } }; } };
+  };
+  Date.now = function () { return new Date('2026-08-28T12:34:00Z').getTime(); };
+
+  try {
+    await fetchWeatherLocationForecast({ query: async function () { return [[]]; } }, {
+      latitude: 51.5,
+      longitude: -0.1,
+      timezone: 'Europe/London',
+      provider: 'open-meteo'
+    });
+  } finally {
+    global.fetch = originalFetch;
+    Date.now = originalDateNow;
+  }
+
+  assert.equal(requestUrl.searchParams.get('forecast_hours'), '24');
+  assert.equal(requestUrl.searchParams.get('forecast_days'), '7');
+});
+
+test('weather forecast preview only shows the fetch hint without a snapshot', () => {
+  const template = fs.readFileSync(path.join(__dirname, '..', 'src', 'web', 'views', 'data-sources', 'weather', 'forecast-preview.hbs'), 'utf8');
+
+  assert.match(template, /\{\{#unless weatherPreview\.hasSnapshot\}\}.*Daily and hourly forecasts will appear here after the first successful fetch\..*\{\{\/unless\}\}/);
+});