Improving Software Test Case Design for a Mobile App

You are an expert QA engineer. Create detailed test cases for the login feature of a mobile application.

Include the following:

Positive test cases (valid login credentials)
Negative test cases (invalid email, wrong password, empty fields)
Boundary cases (long inputs, special characters)
Security-related cases (brute force attempts, SQL injection inputs)

For each test case, provide:

Test Case ID
Test Case Title
Preconditions
Test Steps
Test Data
Expected Result

Ensure the test cases are clear, structured, and suitable for a professional QA team