Fixed timing issue with UTC

src/helpers/iran-datetime.spec.ts

@@ -0,0 +1,26 @@
+import { parseIranLocalDateTime } from "./iran-datetime";
+
+describe("parseIranLocalDateTime", () => {
+  it("parses YYYY-MM-DD + HH:MM as Iran local (not server local)", () => {
+    const instant = parseIranLocalDateTime("2025-05-16", "18:28");
+    expect(instant).not.toBeNull();
+    // 18:28 Iran = 14:58 UTC
+    expect(instant!.toISOString()).toBe("2025-05-16T14:58:00.000Z");
+  });
+
+  it("parses naive ISO datetime as Iran local", () => {
+    const instant = parseIranLocalDateTime("2025-05-16T18:28");
+    expect(instant!.toISOString()).toBe("2025-05-16T14:58:00.000Z");
+  });
+
+  it("respects explicit UTC offset in string", () => {
+    const instant = parseIranLocalDateTime("2025-05-16T14:58:00.000Z");
+    expect(instant!.toISOString()).toBe("2025-05-16T14:58:00.000Z");
+  });
+
+  it("combines Date calendar day in Iran with accidentTime", () => {
+    const dateOnly = new Date("2025-05-16T00:00:00.000Z");
+    const instant = parseIranLocalDateTime(dateOnly, "18:28");
+    expect(instant!.toISOString()).toBe("2025-05-16T14:58:00.000Z");
+  });
+});