Updated PLANS.md, AGENTS.md, and arabic-localization.md to reflect the “foundations now, full translations later” approach and marked progress accordingly.

Implemented localization foundations across backend and frontend (locale settings/middleware, preferred language, i18n wiring, RTL support, minimal Arabic UI strings, Accept-Language).
Added targeted backend and frontend tests plus a risks note for pending full translation coverage.

backend/apps/accounts/services/phone.py

@@ -1,9 +1,11 @@
 import re
 
+from django.utils.translation import gettext as _
+
 
 def normalize_phone_number(raw_phone: str) -> str:
     if not raw_phone:
-        raise ValueError("Phone number is required")
+        raise ValueError(_("Phone number is required"))
 
     phone = re.sub(r"[\s\-\(\)]", "", raw_phone)
     if phone.startswith("00"):
@@ -12,7 +14,7 @@ def normalize_phone_number(raw_phone: str) -> str:
     if phone.startswith("+"):
         digits = phone[1:]
         if not digits.isdigit() or not (8 <= len(digits) <= 15):
-            raise ValueError("Invalid phone number format")
+            raise ValueError(_("Invalid phone number format"))
         return "+" + digits
 
     digits = re.sub(r"\D", "", phone)
@@ -23,4 +25,4 @@ def normalize_phone_number(raw_phone: str) -> str:
     if digits.startswith("5") and len(digits) == 9:
         return "+966" + digits
 
-    raise ValueError("Phone number must be in E.164 format or a valid Saudi mobile")
+    raise ValueError(_("Phone number must be in E.164 format or a valid Saudi mobile"))