fix: align DeepSeek canary tool rounds with gate

deepseek-no-think-proxy.mjs

@@ -6,6 +6,7 @@ import { Agent, fetch as undiciFetch } from 'undici';
 export const DEFAULT_DEEPSEEK_NO_THINK_PORT = 18036;
 export const DEFAULT_DEEPSEEK_UPSTREAM = 'https://api.deepseek.com';
 export const DEFAULT_MOONSHOT_UPSTREAM = 'https://api.moonshot.cn';
+export const DEEPSEEK_COMPAT_CONTRACT_VERSION = 1;
 
 const insecureDispatcher = new Agent({
   connect: { rejectUnauthorized: false },
@@ -256,6 +257,8 @@ export function createDeepseekNoThinkProxy({
       res.writeHead(200, { 'Content-Type': 'application/json' });
       res.end(JSON.stringify({
         ok: true,
+        contractVersion: DEEPSEEK_COMPAT_CONTRACT_VERSION,
+        deepseekThinking: 'disabled',
         upstream: normalizedUpstream,
         moonshotUpstream: normalizedMoonshotUpstream,
       }));