fix: apply automatic clippy fixes across workspace

stub/src/main.rs

@@ -17,7 +17,7 @@ fn init_logging(app_name: &str) -> Option<tracing_appender::non_blocking::Worker
     base_dir.push(".gemini/mcp_memory/logs");
     std::fs::create_dir_all(&base_dir).unwrap_or_default();
 
-    let file_appender = tracing_appender::rolling::daily(base_dir, format!("{}.log", app_name));
+    let file_appender = tracing_appender::rolling::daily(base_dir, format!("{app_name}.log"));
     let (non_blocking, guard) = tracing_appender::non_blocking(file_appender);
 
     let _ = tracing_subscriber::fmt()
@@ -45,16 +45,16 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             let _ = shutdown_tx.send(()).await;
         });
 
-        let target_url = if cli.target != "http://localhost:3000" {
-            cli.target
-        } else {
+        let target_url = if cli.target == "http://localhost:3000" {
             let port = std::env::var("MCP_PORT").unwrap_or_else(|_| "3000".to_string());
-            format!("http://127.0.0.1:{}", port)
+            format!("http://127.0.0.1:{port}")
+        } else {
+            cli.target
         };
         let ws_url = target_url
             .replace("http://", "ws://")
             .replace("https://", "wss://");
-        let ws_url = format!("{}/ws?client=proxy", ws_url);
+        let ws_url = format!("{ws_url}/ws?client=proxy");
 
         loop {
             if shutdown_rx.try_recv().is_ok() {