fix(web): enforce password strength in auth forms

Apply the same password policy to registration and password
changes so operators cannot replace default credentials with
another weak password and users see consistent guidance.

easytier-web/frontend-lib/src/locales/cn.yaml

@@ -363,6 +363,10 @@ web:
     success: 成功
     warning: 警告
     info: 提示
+    password_empty: 密码不能为空
+    password_min_length: 密码至少需要 8 位
+    password_too_weak: 密码强度不足
+    password_strength_hint: 密码至少 8 位，且需包含大小写字母、数字、特殊字符中的至少 2 类
     enable: 开启
     disable: 关闭
     address: 地址

easytier-web/frontend-lib/src/locales/en.yaml

@@ -363,6 +363,10 @@ web:
     success: Success
     warning: Warning
     info: Info
+    password_empty: Password cannot be empty
+    password_min_length: Password must be at least 8 characters long
+    password_too_weak: Password is too weak
+    password_strength_hint: Password must be at least 8 characters and include at least 2 of uppercase letters, lowercase letters, numbers, or special characters
     enable: Enable
     disable: Disable
     address: Address