test(linux): cover upper-half absolute mouse movement

[ReenigneArcher]

Description

Improves test coverage for absolute mouse on Linux.

Screenshot

Issues Fixed or Closed

Roadmap Issues

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

See our AI usage policy.

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.71%. Comparing base (b54a7c2) to head (ade3b05).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #173      +/-   ##
==========================================
+ Coverage   70.68%   70.71%   +0.02%     
==========================================
  Files          47       47              
  Lines       10803    10803              
  Branches     3796     3796              
==========================================
+ Hits         7636     7639       +3     
+ Misses       2798     2487     -311     
- Partials      369      677     +308     

Flag	Coverage Δ
FreeBSD	52.64% <ø> (ø)
Linux-Clang	55.49% <ø> (ø)
Linux-GCC	66.22% <ø> (ø)
PowerShell	75.60% <ø> (ø)
Windows-MSVC	88.95% <ø> (+0.09%)	⬆️
Windows-MinGW-UCRT64	63.78% <ø> (-0.10%)	⬇️
macOS	44.38% <ø> (ø)

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see 13 files with indirect coverage changes

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