fix(style): add missing newline at end of files

[keyserfaty]

Summary

This PR fixes a code style issue by adding missing newlines at the end of two JavaScript files. These trailing newlines follow standard POSIX conventions and ensure consistency across the codebase, preventing potential issues with certain text editors and version control systems.

Changes

• Added trailing newline to src/modules/config/selectors.js
• Added trailing newline to src/utils/libs/vfs_fonts.js

Testing

No functional changes were made, so existing tests should continue to pass without modification. To verify:

1. Run the existing test suite to ensure no regressions
2. Verify that linting checks now pass for these files
3. Confirm that files end with a newline character using cat -A <filename> or your editor's settings