fix(inventory): fix table column shift, show transaction date/time on dashboard cards, and enforce strict multi-layer future date prevention

backend/app/services/inventory_service.py

@@ -22,7 +22,7 @@ SHA256 of the sorted canonical specs JSON (or 'default' when empty).
 import hashlib
 import json
 import uuid
-from datetime import datetime, timezone
+from datetime import datetime, timezone, timedelta
 from decimal import Decimal
 
 from sqlalchemy import select
@@ -177,6 +177,10 @@ async def apply_transaction(
     specs = payload.specs or {}
     specs_hash = canonical_specs_hash(specs)
     tx_date = payload.transaction_date or datetime.now(timezone.utc)
+    # جلوگیری از ثبت تاریخ در آینده
+    now_utc = datetime.now(timezone.utc)
+    if tx_date > now_utc + timedelta(minutes=5):
+        raise ValidationError("امکان ثبت تاریخ یا زمان در آینده وجود ندارد", field="transaction_date")
 
     # STOCK_COUNT: apply the difference between counted and recorded quantity.
     if t == "STOCK_COUNT":