Refactor to_jalali function for improved clarity and type handling

backend/utils/jalali_formatter.py

@@ -1,17 +1,23 @@
+from datetime import date, datetime
+
 import jdatetime
 from django.utils import timezone
 
-def to_jalali(dt):
-    if not dt:
+def to_jalali(value):
+    if not value:
         return None
 
-    dt = timezone.localtime(dt)
+    # Keep already-converted Jalali values untouched.
+    if isinstance(value, (jdatetime.datetime, jdatetime.date)):
+        return value
 
-    return jdatetime.datetime.fromgregorian(
-        year=dt.year,
-        month=dt.month,
-        day=dt.day,
-        hour=dt.hour,
-        minute=dt.minute,
-        second=dt.second,
-    )
+    if isinstance(value, datetime):
+        if timezone.is_naive(value):
+            value = timezone.make_aware(value, timezone.get_current_timezone())
+        value = timezone.localtime(value)
+        return jdatetime.datetime.fromgregorian(datetime=value)
+
+    if isinstance(value, date):
+        return jdatetime.date.fromgregorian(date=value)
+
+    raise TypeError(f"Unsupported type for to_jalali: {type(value)!r}")