feat(calendar): expose an accessible calendar picker

webui/tests/calendar-picker-structure.test.mjs

@@ -0,0 +1,20 @@
+import fs from "node:fs";
+
+function assert(condition, message) {
+  if (!condition) throw new Error(message);
+}
+
+const picker = fs.readFileSync(new URL("../src/features/calendar/CalendarPicker.tsx", import.meta.url), "utf8");
+const moduleSource = fs.readFileSync(new URL("../src/module.ts", import.meta.url), "utf8");
+const coreTypes = fs.readFileSync(new URL("../../../govoplan-core/webui/src/types.ts", import.meta.url), "utf8");
+
+assert(moduleSource.includes('"calendar.picker": calendarPicker'), "Calendar must register the named picker capability");
+assert(coreTypes.includes("export type CalendarPickerUiCapability"), "Core must expose the narrow cross-module contract");
+assert(picker.includes("listCalendars(settings)"), "Picker must use Calendar's authenticated list API");
+assert(picker.includes("hasScope(auth, CALENDAR_PICKER_READ_SCOPE)"), "Picker must avoid loading without read permission");
+assert(picker.includes("value={value}"), "Picker must remain controlled by its consumer");
+assert(picker.includes("onChange={(event) => onChange(event.target.value)}"), "Picker must return the chosen calendar id");
+assert(picker.includes("aria-busy={loading || undefined}"), "Picker must expose loading state accessibly");
+assert(picker.includes("aria-describedby={status ? statusId : undefined}"), "Picker must associate availability feedback");
+
+console.log("Calendar picker capability structure checks passed.");

webui/tests/calendar-picker.test.ts

@@ -0,0 +1,37 @@
+import {
+  calendarPickerOptions,
+  calendarPickerTenantId,
+  type CalendarPickerOption
+} from "../src/features/calendar/calendarPickerLogic";
+
+function assert(condition: unknown, message: string): void {
+  if (!condition) throw new Error(message);
+}
+
+function calendar(id: string, name: string, isDefault = false): CalendarPickerOption {
+  return {
+    id,
+    name,
+    is_default: isDefault
+  };
+}
+
+const input = [
+  calendar("z", "Zulu"),
+  calendar("b", "Bravo", true),
+  calendar("a", "alpha")
+];
+const ordered = calendarPickerOptions(input);
+
+assert(ordered.map((item) => item.id).join(",") === "b,a,z", "default calendar should lead, followed by names");
+assert(input.map((item) => item.id).join(",") === "z,b,a", "picker sorting must not mutate API data");
+assert(
+  calendarPickerTenantId({ tenant: { id: "fallback" }, active_tenant: { id: "active" } }) === "active",
+  "active tenant should partition picker requests"
+);
+assert(
+  calendarPickerTenantId({ tenant: { id: "fallback" } }) === "fallback",
+  "legacy tenant should remain a supported fallback"
+);
+
+console.log("Calendar picker behavior checks passed.");