fix(agent): make tool_call_id field initialization explicit

src/agent/loop_.rs

@@ -387,7 +387,7 @@ fn parse_tool_call_value(value: &serde_json::Value) -> Option<ParsedToolCall> {
             return Some(ParsedToolCall {
                 name,
                 arguments,
-                tool_call_id,
+                tool_call_id: tool_call_id,
             });
         }
     }
@@ -409,7 +409,7 @@ fn parse_tool_call_value(value: &serde_json::Value) -> Option<ParsedToolCall> {
     Some(ParsedToolCall {
         name,
         arguments,
-        tool_call_id,
+        tool_call_id: tool_call_id,
     })
 }