已完成用户APP首期功能开发

交付用户端首期页面、配套接口、后台资源及测试文档。用户APP构建、静态分析和三个管理后台构建通过；完整测试仍有2项失败，后端模型注释检查未通过，详见交付记录。

backend/api/internal/seed/mock.go

@@ -15,6 +15,25 @@ import (
 
 const mockIdentityPrefix = "00000000-0000-7000-8000-"
 
+// RepairMockUserPassword 仅恢复固定开发用户的演示密码，不修改普通用户凭据。
+func RepairMockUserPassword(database *gorm.DB) (int64, error) {
+	passwordHash, err := bcrypt.GenerateFromPassword([]byte("Mock@123456"), bcrypt.DefaultCost)
+	if err != nil {
+		return 0, fmt.Errorf("hash mock user password: %w", err)
+	}
+	result := database.Model(&models.UserAccount{}).Where(
+		"identity = ? AND username = ? AND phone = ? AND status = ?",
+		mockIdentityPrefix+"000000000007", "mock_customer", "13800000001", common.StatusEnable,
+	).Update("password_hash", string(passwordHash))
+	if result.Error != nil {
+		return 0, fmt.Errorf("repair mock user password: %w", result.Error)
+	}
+	if result.RowsAffected != 1 {
+		return result.RowsAffected, errors.New("fixed mock user was not found")
+	}
+	return result.RowsAffected, nil
+}
+
 // MockData idempotently writes one connected development scenario across all
 // domain tables. Fixed identities and unique business numbers make reruns safe.
 func MockData(database *gorm.DB) error {