fix(input): don't send ALT when right-alt is remapped to meta

[ap-1]

Description

key_rightalt_to_key_win only remaps the keycode (0xA5 -> 0x5B), not the client's modifiers bitmask. On clients where right-alt reports as alt (e.g. macOS right-option), packets sent while it's held still carry MODIFIER_ALT, so the synthetic-modifier check injects a real ALT and the host gets META + ALT + <key> instead of META + <key> (e.g. Super+1 binds fire as Super+Alt+1).

Clearing MODIFIER_ALT from that check when right-alt is the only alt held and the remap is active avoids this; a real left-alt still passes through.

Tested on Wayland/Hyprland with a macOS Moonlight client. With the remap on, Super+<n> binds reach the compositor as Super+<n>.

Screenshot

Issues Fixed or Closed

• Fixes "Map Right Alt key to Windows Key" registers as alt+win #4531

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

• 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

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