fix(deps): regenerate patch for @mintel/payload-ai@1.9.18

patches/@mintel__payload-ai@1.9.18.patch

@@ -1,13 +1,13 @@
 diff --git a/dist/endpoints/chatEndpoint.js b/dist/endpoints/chatEndpoint.js
-index 85a4a2d1ab757e32a303d9f4b2462436af5e2398..23902b2a18eedb583d8a6ee7028c5e855177880b 100644
+index 1f1b2327d8d5d3c57b29fdfaf70bec3a537782c7..be8df4bae39e470f557985bb154be15492f22263 100644
 --- a/dist/endpoints/chatEndpoint.js
 +++ b/dist/endpoints/chatEndpoint.js
-@@ -49,7 +49,7 @@ export const handleMcpChat = async (req) => {
+@@ -97,7 +97,7 @@ export const handleMcpChat = async (req) => {
+         : "";
      try {
          const result = streamText({
-             // @ts-ignore - AI SDK type mismatch
--            model: openrouter('google/gemini-3.0-flash'),
-+            model: openrouter('google/gemini-3.1-flash-lite-preview'),
+-            model: openrouter("google/gemini-3.0-flash"),
++            model: openrouter("google/gemini-3.1-flash-lite-preview"),
              messages,
              tools: activeTools,
-             system: `You are a helpful Payload CMS MCP Assistant orchestrating the local Mintel ecosystem.
+             // @ts-expect-error - AI SDK type mismatch with maxSteps