fix: clippy-clean — rename to_bytes→write_to, fix Justfile clippy args

Justfile

@@ -42,7 +42,7 @@ check board:
 
 # Run clippy on a single board
 clippy board:
-    @just _cargo {{board}} "clippy -- -D warnings"
+    @just _cargo {{board}} "clippy" "-- -D warnings"
 
 # Build release firmware and copy to firmware/ with a readable name
 build board profile="release":
@@ -68,7 +68,7 @@ size board:
 # Run a cargo command for a board.
 # Xtensa: nightly cargo + esp rustc (via RUSTC override) + -Zbuild-std=core
 [private]
-_cargo board cmd:
+_cargo board cmd extra_args="":
     @read -r feat target chip <<< "$(just _info {{board}})"; \
     env=""; extra=""; \
     case "$target" in xtensa-*) \
@@ -76,7 +76,7 @@ _cargo board cmd:
         [ -f "$HOME/export-esp.sh" ] && . "$HOME/export-esp.sh"; \
         env="RUSTC=$(rustup which rustc --toolchain esp)"; extra="+nightly";; \
     esac; \
-    eval $env cargo $extra {{cmd}} --target $target --features $feat
+    eval $env cargo $extra {{cmd}} --target "$target" --features "$feat" {{extra_args}}
 
 # Check if a board's toolchain is available (silent, for build-all/check-all skipping)
 [private]

src/protocol.rs

@@ -98,7 +98,7 @@ impl RadioConfig {
     }
 
     /// Serialize to fixed-size LE bytes. Returns number of bytes written (always 10).
-    pub fn to_bytes(&self, buf: &mut [u8]) -> usize {
+    pub fn write_to(self, buf: &mut [u8]) -> usize {
         buf[0..4].copy_from_slice(&self.freq_hz.to_le_bytes());
         buf[4] = self.bw as u8;
         buf[5] = self.sf;
@@ -159,7 +159,7 @@ impl Command {
                 }
                 let (config, pos) = if rest[0] == 0 {
                     (None, 1)
-                } else if rest[0] == 1 && rest.len() >= 1 + RADIO_CONFIG_SIZE {
+                } else if rest[0] == 1 && rest.len() > RADIO_CONFIG_SIZE {
                     (Some(RadioConfig::from_bytes(&rest[1..])?), 1 + RADIO_CONFIG_SIZE)
                 } else {
                     return None;
@@ -201,7 +201,7 @@ pub enum Response {
 
 impl Response {
     /// Serialize to fixed-size LE bytes. Returns number of bytes written.
-    pub fn to_bytes(&self, buf: &mut [u8]) -> usize {
+    pub fn write_to(self, buf: &mut [u8]) -> usize {
         match self {
             Self::Pong => {
                 buf[0] = 0;
@@ -209,14 +209,14 @@ impl Response {
             }
             Self::Config(cfg) => {
                 buf[0] = 1;
-                1 + cfg.to_bytes(&mut buf[1..])
+                1 + cfg.write_to(&mut buf[1..])
             }
             Self::RxPacket { rssi, snr, payload } => {
                 buf[0] = 2;
                 buf[1..3].copy_from_slice(&rssi.to_le_bytes());
                 buf[3..5].copy_from_slice(&snr.to_le_bytes());
                 buf[5..7].copy_from_slice(&(payload.len() as u16).to_le_bytes());
-                buf[7..7 + payload.len()].copy_from_slice(payload);
+                buf[7..7 + payload.len()].copy_from_slice(&payload);
                 7 + payload.len()
             }
             Self::TxDone => {
@@ -229,7 +229,7 @@ impl Response {
             }
             Self::Error(code) => {
                 buf[0] = 5;
-                buf[1] = *code as u8;
+                buf[1] = code as u8;
                 2
             }
         }
@@ -239,6 +239,7 @@ impl Response {
 /// Error codes reported to the host.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, defmt::Format)]
 #[repr(u8)]
+#[allow(dead_code)]
 pub enum ErrorCode {
     InvalidConfig = 0,
     RadioBusy = 1,

src/usb/task.rs

@@ -146,7 +146,7 @@ async fn protocol_loop<'d, D: embassy_usb_driver::Driver<'d>>(
             }
             Either3::Second(response) => {
                 // Serialize response to fixed-size LE bytes, then COBS encode
-                let raw_len = response.to_bytes(&mut write_buf);
+                let raw_len = response.write_to(&mut write_buf);
                 let encoded_len = cobs::encode(&write_buf[..raw_len], &mut cobs_encode_buf);
                 // Append 0x00 sentinel
                 if encoded_len < cobs_encode_buf.len() {