fix: don't let persisted config override key-based auto-detection

init, auth set-key, and createDeepLClient were passing the config's
api.baseUrl to HttpClient, which overrode auto-detection for users
with old config files that had the pro URL hardcoded.

- init/auth: validate new keys with auto-detected endpoint only
- createDeepLClient: stop passing usePro (redundant with auto-detect)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: shirgoldbird

src/cli/commands/auth.ts

@@ -27,11 +27,8 @@ export class AuthCommand {
     // Note: No format validation - let the API determine if the key is valid
     // This supports production keys (:fx suffix), free keys, and test keys
     try {
-      // Use configured API endpoint for validation
-      const baseUrl = this.config.getValue<string>('api.baseUrl');
-      const usePro = this.config.getValue<boolean>('api.usePro');
-
-      const client = new DeepLClient(apiKey, { baseUrl, usePro });
+      // Let the client auto-detect the endpoint from the key suffix
+      const client = new DeepLClient(apiKey);
       await client.getUsage(); // Test API key validity
     } catch (error) {
       if (error instanceof Error) {

src/cli/commands/init.ts

@@ -39,9 +39,7 @@ export class InitCommand {
     Logger.output('\nValidating API key...');
 
     const { DeepLClient } = await import('../../api/deepl-client.js');
-    const baseUrl = this.config.getValue<string>('api.baseUrl');
-    const usePro = this.config.getValue<boolean>('api.usePro');
-    const client = new DeepLClient(apiKey.trim(), { baseUrl, usePro });
+    const client = new DeepLClient(apiKey.trim());
     await client.getUsage();
 
     this.config.set('auth.apiKey', apiKey.trim());

src/cli/index.ts

@@ -100,15 +100,14 @@ async function createDeepLClient(overrideBaseUrl?: string): Promise<DeepLClient>
   }
 
   const baseUrl = overrideBaseUrl ?? configService.getValue<string>('api.baseUrl');
-  const usePro = configService.getValue<boolean>('api.usePro');
 
   if (baseUrl) {
     const { validateApiUrl } = await import('../utils/validate-url.js');
     validateApiUrl(baseUrl);
   }
 
   const { DeepLClient: Client } = await import('../api/deepl-client.js');
-  return new Client(key, { baseUrl, usePro });
+  return new Client(key, { baseUrl });
 }
 
 // Create program
@@ -198,9 +197,8 @@ function getApiKeyAndOptions(): { apiKey: string; options: import('../api/http-c
   if (baseUrl) {
     validateApiUrl(baseUrl);
   }
-  const usePro = configService.getValue<boolean>('api.usePro');
 
-  return { apiKey: key, options: { baseUrl, usePro } };
+  return { apiKey: key, options: { baseUrl } };
 }
 
 // Shared dependencies passed to register functions