fix: resolve all clippy warnings

src/bin/camera_test.rs

@@ -1,12 +1,12 @@
-/// camera-test — capture a frame from the IR camera and save it as PNG
-/// Usage: cargo run --bin camera-test [/dev/video2] [output.png]
+//! camera-test — capture a frame from the IR camera and save it as PNG
+//! Usage: cargo run --bin camera-test [/dev/video2] [output.png]
 
 fn main() {
     eprintln!("[camera-test] Starting...");
 
     let device_path = std::env::args()
         .nth(1)
-        .unwrap_or_else(|| pam_rustface::camera::auto_detect_ir_camera());
+        .unwrap_or_else(pam_rustface::camera::auto_detect_ir_camera);
     let output_path = std::env::args()
         .nth(2)
         .unwrap_or_else(|| "frame.png".to_owned());

src/bin/enroll.rs

@@ -76,7 +76,7 @@ fn main() {
     // Open camera — auto-detect IR camera if not specified
     let device = std::env::args()
         .nth(3)
-        .unwrap_or_else(|| pam_rustface::camera::auto_detect_ir_camera());
+        .unwrap_or_else(pam_rustface::camera::auto_detect_ir_camera);
     eprintln!("[enroll] Camera: {device}");
     let camera = IrCamera::open(&device).unwrap_or_else(|e| {
         eprintln!("[enroll] ERROR opening camera: {e}");

src/bin/sim_test.rs

@@ -35,7 +35,7 @@ fn main() {
 
     let device = std::env::args()
         .nth(2)
-        .unwrap_or_else(|| pam_rustface::camera::auto_detect_ir_camera());
+        .unwrap_or_else(pam_rustface::camera::auto_detect_ir_camera);
     eprintln!("[sim-test] Camera: {device}");
     let camera = IrCamera::open(&device).expect("Failed to open camera");
 

src/pam/constants.rs

@@ -1,6 +1,5 @@
 use std::os::raw::c_int;
 
 pub const PAM_SUCCESS: c_int = 0;
-pub const PAM_AUTH_ERR: c_int = 7;
 pub const PAM_IGNORE: c_int = 25;
 pub const PAM_USER: c_int = 2;

src/pam/mod.rs

@@ -1,5 +1,2 @@
 pub mod constants;
 pub mod handle;
-
-pub use constants::{PAM_AUTH_ERR, PAM_IGNORE, PAM_SUCCESS};
-pub use handle::{get_username, PamHandle};

src/storage/mod.rs

@@ -20,10 +20,6 @@ impl FaceStore {
         }
     }
 
-    pub fn default() -> Self {
-        Self::new(FACES_DIR)
-    }
-
     fn user_path(&self, username: &str) -> PathBuf {
         self.base_path.join(format!("{username}.bin"))
     }
@@ -47,3 +43,9 @@ impl FaceStore {
         write::write_embedding(&path, embedding)
     }
 }
+
+impl Default for FaceStore {
+    fn default() -> Self {
+        Self::new(FACES_DIR)
+    }
+}