refactor: remove unix socket support fallback

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server.rs

@@ -96,13 +96,7 @@ async fn run_server(
                 .layer(CorsLayer::permissive())
         );
     
-    let addr: SocketAddr = if bind_address.starts_with('/') || bind_address.starts_with("./") {
-        // Unix socket - not supported by axum directly, fall back to TCP
-        warn!("Unix sockets not yet implemented, falling back to TCP on 127.0.0.1:21080");
-        "127.0.0.1:21080".parse()?
-    } else {
-        bind_address.parse()?
-    };
+    let addr: SocketAddr = bind_address.parse()?;
     
     info!("SERVER: HTTP server listening on {}", addr);