chore(lint): extend low-risk clippy cleanup batch

- normalize numeric literals (115_200) in hardware/peripheral config paths

- remove test-only useless format! allocations in discord IDs

- simplify closures and auto-deref in browser/http/rag/peripherals

- keep behavior unchanged while reducing warning surface

src/peripherals/mod.rs

@@ -91,7 +91,7 @@ pub fn handle_command(cmd: crate::PeripheralCommands, config: &Config) -> Result
                 board: board.clone(),
                 transport: transport.to_string(),
                 path: path_opt,
-                baud: 115200,
+                baud: 115_200,
             });
             cfg.save()?;
             println!("Added {} at {}. Restart daemon to apply.", board, path);

src/peripherals/serial.rs

@@ -76,7 +76,7 @@ impl SerialTransport {
         let mut port = self.port.lock().await;
         let resp = tokio::time::timeout(
             std::time::Duration::from_secs(SERIAL_TIMEOUT_SECS),
-            send_request(&mut *port, cmd, args),
+            send_request(&mut port, cmd, args),
         )
         .await
         .map_err(|_| {

src/peripherals/uno_q_setup.rs

@@ -66,7 +66,7 @@ fn deploy_remote(host: &str, bridge_dir: &std::path::Path) -> Result<()> {
             "arduino-app-cli",
             "app",
             "start",
-            &format!("~/ArduinoApps/zeroclaw-uno-q-bridge"),
+            "~/ArduinoApps/zeroclaw-uno-q-bridge",
         ])
         .status()
         .context("arduino-app-cli start failed")?;