refactor(providers): clean up config structure and update PackyCode domain

- Remove redundant 'config' field from Claude default configuration
  * Align with SSOT architecture where Claude only requires 'env' field
  * Matches the actual structure used in settings.json

- Update PackyCode provider configuration
  * Migrate domain: packycode.com → packyapi.com
  * Update API endpoints to new domain structure
  * Update load balancer endpoint: api-slb.packycode.com → api-slb.packyapi.com

src/components/providers/forms/ProviderForm.tsx

@@ -36,7 +36,7 @@ import {
   useCodexTomlValidation,
 } from "./hooks";
 
-const CLAUDE_DEFAULT_CONFIG = JSON.stringify({ env: {}, config: {} }, null, 2);
+const CLAUDE_DEFAULT_CONFIG = JSON.stringify({ env: {} }, null, 2);
 const CODEX_DEFAULT_CONFIG = JSON.stringify({ auth: {}, config: "" }, null, 2);
 
 type PresetEntry = {

src/config/providerPresets.ts

@@ -166,18 +166,18 @@ export const providerPresets: ProviderPreset[] = [
   },
   {
     name: "PackyCode",
-    websiteUrl: "https://www.packycode.com",
-    apiKeyUrl: "https://www.packycode.com/",
+    websiteUrl: "https://www.packyapi.com",
+    apiKeyUrl: "https://www.packyapi.com",
     settingsConfig: {
       env: {
-        ANTHROPIC_BASE_URL: "https://api.packycode.com",
+        ANTHROPIC_BASE_URL: "https://www.packyapi.com",
         ANTHROPIC_AUTH_TOKEN: "",
       },
     },
     // 请求地址候选（用于地址管理/测速）
     endpointCandidates: [
-      "https://api.packycode.com",
-      "https://api-slb.packycode.com",
+      "https://www.packyapi.com",
+      "https://api-slb.packyapi.com",
     ],
     category: "third_party",
   },