chore(settings): align default ai model handling

packages/api/src/router/settings-support.ts

@@ -1,4 +1,4 @@
-import { VALUE_SCORE_WEIGHTS } from "@capakraken/shared";
+import { DEFAULT_OPENAI_MODEL, VALUE_SCORE_WEIGHTS } from "@capakraken/shared";
 import { z } from "zod";
 import {
   isAiConfigured,
@@ -238,7 +238,7 @@ export async function testRuntimeAiConnection(settings: {
     });
   }
 
-  const model = configuredSettings.azureOpenAiDeployment ?? "gpt-4o-mini";
+  const model = configuredSettings.azureOpenAiDeployment ?? DEFAULT_OPENAI_MODEL;
   return performAiConnectionFetch(
     provider,
     "https://api.openai.com/v1/chat/completions",