refactor: consolidate nvim crates, extract server library, and update workspace dependencies

stub/src/logger.rs

@@ -40,3 +40,48 @@ pub fn extract_log_prefix(json_str: &str, is_response: bool) -> String {
         "Message".to_string()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_extract_log_prefix_response() {
+        let json_str = r#"{"jsonrpc":"2.0","id":123,"result":{}}"#;
+        assert_eq!(extract_log_prefix(json_str, true), "Response id=123 [Error: false]");
+
+        let err_json = r#"{"jsonrpc":"2.0","id":456,"error":{"code":-32600,"message":"Invalid Request"}}"#;
+        assert_eq!(extract_log_prefix(err_json, true), "Response id=456 [Error: true]");
+
+        let is_err_json = r#"{"jsonrpc":"2.0","id":789,"result":{"isError":true}}"#;
+        assert_eq!(extract_log_prefix(is_err_json, true), "Response id=789 [Error: true]");
+    }
+
+    #[test]
+    fn test_extract_log_prefix_tool_call() {
+        let json_str = r#"{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"search"}}"#;
+        assert_eq!(extract_log_prefix(json_str, false), "ToolCall[search] id=1");
+
+        let unknown_tool = r#"{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{}}"#;
+        assert_eq!(extract_log_prefix(unknown_tool, false), "ToolCall[unknown] id=2");
+    }
+
+    #[test]
+    fn test_extract_log_prefix_request() {
+        let json_str = r#"{"jsonrpc":"2.0","id":10,"method":"initialize"}"#;
+        assert_eq!(extract_log_prefix(json_str, false), "Request[initialize] id=10");
+    }
+
+    #[test]
+    fn test_extract_log_prefix_response_as_request() {
+        let json_str = r#"{"jsonrpc":"2.0","id":99,"result":true}"#;
+        assert_eq!(extract_log_prefix(json_str, false), "Response id=99");
+    }
+
+    #[test]
+    fn test_extract_log_prefix_generic_message() {
+        let json_str = r#"{"foo":"bar"}"#;
+        assert_eq!(extract_log_prefix(json_str, false), "Message");
+    }
+}
+