fix: update DeepSeek direct models to v4

scripts/fix-deepseek-direct.mjs

@@ -40,14 +40,14 @@ const CONFIG_NAME = 'DeepSeek 直连';
 async function testDirectDeepSeek() {
   const dispatcher = new Agent({ connect: { rejectUnauthorized: true } });
   const started = Date.now();
-  const res = await fetch('https://api.deepseek.com/chat/completions', {
+  const res = await fetch('https://api.deepseek.com/v1/chat/completions', {
     method: 'POST',
     headers: {
       'Content-Type': 'application/json',
       Authorization: `Bearer ${apiKey}`,
     },
     body: JSON.stringify({
-      model: 'deepseek-chat',
+      model: 'deepseek-v4-pro',
       messages: [{ role: 'user', content: 'Hello' }],
       stream: false,
     }),
@@ -78,7 +78,7 @@ if (rowId) {
   const updated = await svc.updateKey(rowId, {
     name: CONFIG_NAME,
     apiKey,
-    defaultModel: 'deepseek-chat',
+    defaultModel: 'deepseek-v4-pro',
   });
   if (!updated.ok) {
     console.error('更新 DeepSeek 配置失败:', updated.message);
@@ -90,7 +90,7 @@ if (rowId) {
     providerId: 'custom_deepseek',
     name: CONFIG_NAME,
     apiKey,
-    defaultModel: 'deepseek-chat',
+    defaultModel: 'deepseek-v4-pro',
   });
   if (!created.ok) {
     console.error('创建 DeepSeek 配置失败:', created.message);