chore: implement js test suites

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

tests/js/unit/entityInstances.test.ts

@@ -29,9 +29,9 @@ describe('entity instance expansion', () => {
       eventEntity('meeting', localIso(2026, 5, 15, 9), localIso(2026, 5, 15, 10)),
     )
 
-    expect(instance.durationMs).toBe(60 * 60 * 1000)
+    expect(instance.duration).toBe(60 * 60 * 1000)
     expect(new Date(instance.start).getHours()).toBe(9)
-    expect(new Date(instance.dayStartMs).getHours()).toBe(0)
+    expect(new Date(instance.dayStart).getHours()).toBe(0)
     expect(instance.instanceId).toBeNull()
     expect(instance.multiDay).toBe(false)
   })
@@ -56,7 +56,7 @@ describe('entity instance expansion', () => {
 
     const end = new Date(instance.end)
     expect([end.getDate(), end.getHours()]).toEqual([21, 0])
-    expect(new Date(instance.dayStartMs).getDate()).toBe(20)
+    expect(new Date(instance.dayStart).getDate()).toBe(20)
     expect(instance.multiDay).toBe(false)
   })
 
@@ -75,7 +75,7 @@ describe('entity instance expansion', () => {
       eventEntity('instant', localIso(2026, 5, 15, 9), null),
     )
 
-    expect(instance.durationMs).toBe(1)
+    expect(instance.duration).toBe(1)
   })
 
   it('omits a non-recurring event outside the requested range', () => {