style: cargo fmt --all — make codebase rustfmt-clean

First run of the build-and-test CI gate (cargo fmt --all -- --check) surfaced
pre-existing formatting drift across the agent and server crates. Apply rustfmt
across the workspace so the codebase meets its own CI gate. Pure formatting; no
logic changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

agent/src/input/mod.rs

@@ -2,11 +2,11 @@
 //!
 //! Handles mouse and keyboard input simulation using Windows SendInput API.
 
-mod mouse;
 mod keyboard;
+mod mouse;
 
-pub use mouse::MouseController;
 pub use keyboard::KeyboardController;
+pub use mouse::MouseController;
 
 use anyhow::Result;