feat: 移除密码强度正则验证，简化密码修改表单验证逻辑

src/views/auth/schema.ts

@@ -9,8 +9,7 @@ export const SignupSchema = zod.object({
   password: zod
     .string()
     .min(6, "密码至少6位")
-    .max(20, "密码最多20位")
-    .regex(/^(?=.*[a-z])(?=.*\d).+$/i, "密码必须包含字母和数字"),
+    .max(20, "密码最多20位"),
 
   confirmPassword: zod
     .string()

src/views/security/change_password.vue

@@ -27,8 +27,7 @@ const ChangePasswordSchema = zod.object({
   newPassword: zod
     .string()
     .min(6, "新密码至少6位")
-    .max(20, "新密码最多20位")
-    .regex(/^(?=.*[a-z])(?=.*\d).+$/i, "新密码必须包含字母和数字"),
+    .max(20, "新密码最多20位"),
 
   confirmPassword: zod
     .string()