Add birthday previews and restore checklist taps

tests/test_data.js

@@ -0,0 +1,18 @@
+const assert = require("node:assert/strict");
+
+global.window = {};
+require("../static/data.js");
+
+const data = global.window.VALLEY_DATA;
+const birthdayNames = Object.values(data.birthdays)
+  .flatMap(days => Object.values(days))
+  .map(([name]) => name);
+
+for (const name of birthdayNames) {
+  const profile = data.giftProfiles[name];
+  assert.ok(profile, `${name} needs a gift profile`);
+  assert.ok(profile.loves.length > 0, `${name} needs a loved gift`);
+  assert.ok(profile.avoid.length > 0, `${name} needs a gift to avoid`);
+}
+
+console.log("birthday gift data tests passed");