feat(planning): ship holiday-aware planning and assistant upgrades

packages/engine/src/__tests__/recurrence.test.ts

@@ -113,7 +113,7 @@ describe("getRecurringHoursForDay", () => {
   it("returns 0 before pattern startDate", () => {
     const patternWithStart: RecurrencePattern = {
       ...weeklyPattern,
-      startDate: new Date("2026-03-16"),
+      startDate: "2026-03-16",
     };
     expect(getRecurringHoursForDay(monday, patternWithStart, 8, allocationStart)).toBe(0);
   });
@@ -121,7 +121,7 @@ describe("getRecurringHoursForDay", () => {
   it("returns 0 after pattern endDate", () => {
     const patternWithEnd: RecurrencePattern = {
       ...weeklyPattern,
-      endDate: new Date("2026-03-08"),
+      endDate: "2026-03-08",
     };
     expect(getRecurringHoursForDay(monday, patternWithEnd, 8, allocationStart)).toBe(0);
   });
@@ -129,8 +129,8 @@ describe("getRecurringHoursForDay", () => {
   it("returns hours within pattern date bounds", () => {
     const bounded: RecurrencePattern = {
       ...weeklyPattern,
-      startDate: new Date("2026-03-01"),
-      endDate: new Date("2026-03-31"),
+      startDate: "2026-03-01",
+      endDate: "2026-03-31",
     };
     expect(getRecurringHoursForDay(monday, bounded, 8, allocationStart)).toBe(8);
   });