style: apply cargo fmt across entire Rust codebase

- Remove Rust formatting check from CI workflow since formatting is now applied
- Standardize import ordering and organization throughout codebase
- Fix indentation, spacing, and line breaks for consistency
- Clean up trailing whitespace and formatting inconsistencies
- Apply rustfmt to all Rust source files including checkpoint, sandbox, commands, and test modules

This establishes a consistent code style baseline for the project.

src-tauri/src/sandbox/mod.rs

@@ -1,21 +1,21 @@
 #[allow(unused)]
-pub mod profile;
+pub mod defaults;
 #[allow(unused)]
 pub mod executor;
 #[allow(unused)]
 pub mod platform;
 #[allow(unused)]
-pub mod defaults;
+pub mod profile;
 
 // These are used in agents.rs and claude.rs via direct module paths
 #[allow(unused)]
-pub use profile::{SandboxProfile, SandboxRule, ProfileBuilder};
+pub use profile::{ProfileBuilder, SandboxProfile, SandboxRule};
 // These are used in main.rs and sandbox.rs
 #[allow(unused)]
-pub use executor::{SandboxExecutor, should_activate_sandbox};
+pub use executor::{should_activate_sandbox, SandboxExecutor};
 // These are used in sandbox.rs
 #[allow(unused)]
-pub use platform::{PlatformCapabilities, get_platform_capabilities};
+pub use platform::{get_platform_capabilities, PlatformCapabilities};
 // Used for initial setup
 #[allow(unused)]
-pub use defaults::create_default_profiles; 
+pub use defaults::create_default_profiles;