- config.rs: Added Default derive, removed manual impl - template.rs: Simplified iterator with flatten() - camera/linux.rs: Added transmute annotations, fixed doc syntax - camera/mod.rs: Allow unused imports from linux module - ipc.rs: Renamed default() to with_default_path(), simplified closures - secure_memory.rs: Use is_multiple_of() instead of modulo - phase3_security_test.rs: Use std::f32::consts::PI