Rafforza i requisiti password con regole di complessità di mercato.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/config/locales/app.en.yml

@@ -1,4 +1,21 @@
 en:
+  password_policy:
+    hint: "At least 8 characters, including 3 of: lowercase, uppercase, numbers and symbols."
+  activerecord:
+    errors:
+      models:
+        user:
+          attributes:
+            password:
+              too_short: "is too short (minimum is %{count} characters)"
+              too_long: "is too long (maximum is %{count} characters)"
+              complexity: "must include at least 3 of: lowercase letters, uppercase letters, numbers and symbols"
+        admin_account:
+          attributes:
+            password:
+              too_short: "is too short (minimum is %{count} characters)"
+              too_long: "is too long (maximum is %{count} characters)"
+              complexity: "must include at least 3 of: lowercase letters, uppercase letters, numbers and symbols"
   club:
     back_to_club: "← Club"
     sport_label: Main sport
@@ -604,6 +621,9 @@ en:
       email_sent: If the email is registered, you'll receive a password reset link shortly.
       invalid_or_expired_link: Invalid or expired link. Request a new password reset.
       password_min_length: Password must be at least 8 characters
+      password_too_short: Password must be at least 8 characters
+      password_too_long: Password cannot exceed 72 characters
+      password_too_weak: "Password must include at least 3 of: lowercase, uppercase, numbers and symbols"
       password_mismatch: Passwords don't match
       password_updated: Password updated. You can now log in.
     accounts:
@@ -611,6 +631,8 @@ en:
       profile_updated: Profile updated.
       password_current_incorrect: Current password is incorrect
       password_too_short: Password must be at least 8 characters
+      password_too_long: Password cannot exceed 72 characters
+      password_too_weak: "Password must include at least 3 of: lowercase, uppercase, numbers and symbols"
       password_mismatch: Passwords do not match
       password_updated: Password updated.
     replay: