fix: clone accept header before moving request

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/modes/server/common.rs

@@ -213,11 +213,12 @@ pub async fn logging_middleware(
     let method = request.method().clone();
     let uri = request.uri().clone();
     
-    // Log the Accept header
+    // Log the Accept header - extract before moving the request
     let accept_header = request.headers()
         .get("accept")
         .and_then(|v| v.to_str().ok())
-        .unwrap_or("-");
+        .unwrap_or("-")
+        .to_string();
     
     let start = Instant::now();
     let response = next.run(request).await;