The Salesforce Lightning Design System (SLDS) reflects the patterns and components that underpin the Salesforce product. These patterns and components provide a unified language and consistent look and feel when designing apps and products within the Salesforce ecosystem. The Lightning Experience UI, which SLDS represents, was crafted using four core design principles. We encourage you to keep them in mind as you develop your applications.They are1:
Clarity - Eliminate ambiguity. Enable people to see, understand, and act with confidence.
Efficiency - Streamline and optimize workflows. Intelligently anticipate needs to help people work better, smarter, and faster.
Consistency - Create familiarity and strengthen intuition by applying the same solution to the same problem.
Beauty - Demonstrate respect for people's time and attention through thoughtful and elegant craftsmanship.Introduction to the Salesforce Lightning Design System

The development team missed two features that are causing the problems:
TheWith Sharingkeyword in Apex classes to enforce sharing rules evaluation. This keyword allows the Apex class to run in the context of the current user and respect the organization's sharing rules. Without this keyword, the Apex class runs in system mode and ignores the sharing rules, which can result in unauthorized access to records that belong to other users .
TheisAccessible()method in Apex classes to check field accessibility. This method returns true if the current user has read access to the specified field, and false otherwise. Without this method, the Apex class does not check the field-level security settings and can display fields that should be hidden from the user, such as the shipment amount .
1: Using the with sharing or without sharing Keywords
2: Enforcing Sharing Rules in Apex
3: Schema.DescribeFieldResult Class
4: Enforcing CRUD and FLS

A usability testing report is a document that summarizes the findings and insights from a usability test, which is a method of evaluating a product or service by observing how real users interact with it.A usability testing report should provide clear and actionable recommendations for improving the user experience and usability of the product or service1. One of the best practices for presenting the findings of a usability testing report is to be specific about the issues testers encountered. This means describing the problems in detail, explaining how they affected the user's performance and satisfaction, and providing evidence from the data collected, such as quotes, screenshots, videos, or metrics.Being specific about the issues helps to illustrate the severity and impact of the problems, as well as to justify the need for improvement2.
The other two options, reporting only the new issues and omitting already known bugs, and including the names of participants in the report, are not good practices for presenting the findings of a usability testing report. Reporting only the new issues and omitting already known bugs can create a biased and incomplete picture of the usability test results, as it can overlook the recurring and persistent problems that may still affect the user experience and usability of the product or service.Including the names of participants in the report can violate the ethical and legal principles of user research, such as confidentiality, anonymity, and informed consent, which require protecting the privacy and identity of the users who participate in the research3.

The SLDS Validator extension for VS Code is a tool that simplifies working with the Salesforce Lightning Design System (SLDS) in Aura and Lightning components. It provides code completion, syntax highlighting, and validation with recommended tokens and utility classes. It also scans the markup and validates it against a database of guidelines, tips, and best practices extracted from the SLDS documentation.It offers suggestions on how to improve the code and avoid conflicts with SLDS12.SLDS Validator - Visual Studio Marketplace,SLDS Validator for VS Code - Lightning Design System

A Community Manager is a Salesforce persona who is responsible for creating, managing, and moderating online communities that connect customers, partners, and employees. They spend most of their time engaging with community members, enforcing community standards, and providing member support. A Community Manager aligns with the user who performs similar tasks in moderating forums.: Salesforce Personas : Community Manager Roles and Responsibilities