feat: allow dashboard section reordering

tests/dashboard-sections.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  DEFAULT_DASHBOARD_SECTION_ORDER,
+  normalizeDashboardSectionOrder,
+  normalizeDashboardSectionVisibility,
+} from "@/lib/dashboard-sections";
+
+describe("dashboard sections", () => {
+  it("keeps stored section order and appends missing defaults", () => {
+    expect(normalizeDashboardSectionOrder(["forecast", "weatherBrief", "unknown"])).toEqual([
+      "forecast",
+      "weatherBrief",
+      "warnings",
+      "favorites",
+      "featuredStations",
+    ]);
+  });
+
+  it("falls back to the default order for invalid values", () => {
+    expect(normalizeDashboardSectionOrder(null)).toEqual(DEFAULT_DASHBOARD_SECTION_ORDER);
+  });
+
+  it("normalizes visibility for older stored preferences", () => {
+    expect(normalizeDashboardSectionVisibility({ weatherBrief: false })).toEqual({
+      warnings: true,
+      weatherBrief: false,
+      forecast: true,
+      favorites: true,
+      featuredStations: false,
+    });
+  });
+});