fix(translator): keep tool-result images, restore Kiro tool names, preserve thinking display

Forward images inside tool_result to OpenAI and Kiro upstreams via following user messages, restore original client tool names on Kiro responses via _toolNameMap, and preserve thinking display settings across translations.

open-sse/translator/request/openai-to-kiro.js

@@ -434,6 +434,13 @@ export function openaiToKiroRequest(model, body, stream, credentials) {
     enumerable: false
   });
 
+  // Kiro tool specs get sanitized names (`mcp__a__b` → `mcp_a_b`); keep the
+  // reverse map so tool calls stream back under the client's own names.
+  const restoredToolNames = new Map();
+  for (const [original, sanitized] of nameMap) {
+    if (original !== sanitized) restoredToolNames.set(sanitized, original);
+  }
+  if (restoredToolNames.size) payload._toolNameMap = restoredToolNames;
   return payload;
 }