fix(preset): use ANTHROPIC_AUTH_TOKEN for DMXAPI and correct endpoint candidates

- Change DMXAPI preset from ANTHROPIC_API_KEY to ANTHROPIC_AUTH_TOKEN
- Fix endpointCandidates that were incorrectly copied from AiHubMix

src/config/claudeProviderPresets.ts

@@ -290,11 +290,11 @@ export const providerPresets: ProviderPreset[] = [
     settingsConfig: {
       env: {
         ANTHROPIC_BASE_URL: "https://www.dmxapi.cn",
-        ANTHROPIC_API_KEY: "",
+        ANTHROPIC_AUTH_TOKEN: "",
       },
     },
     // 请求地址候选（用于地址管理/测速），用户可自行选择/覆盖
-    endpointCandidates: ["https://aihubmix.com", "https://api.aihubmix.com"],
+    endpointCandidates: ["https://www.dmxapi.cn", "https://api.dmxapi.cn"],
     category: "aggregator",
   },
   {