feat(service): add OpenAI completions models output probe (#97)

internal/providers/service.go

@@ -254,12 +254,10 @@ func probeReachable(ctx context.Context, baseURL string) (bool, string) {
 }
 
 func probeOpenAICompletions(ctx context.Context, baseURL, apiKey string) CheckResult {
-	body := `{"model":"probe-test","messages":[{"role":"user","content":"hi"}],"max_tokens":1}`
-	return probeEndpoint(ctx, http.MethodPost, baseURL+"/chat/completions",
+	return probeEndpoint(ctx, http.MethodGet, baseURL+"/models",
 		map[string]string{
 			"Authorization": "Bearer " + apiKey,
-			"Content-Type":  "application/json",
-		}, body)
+		}, "")
 }
 
 func probeOpenAIResponses(ctx context.Context, baseURL, apiKey string) CheckResult {

packages/web/src/constants/client-types.ts

@@ -15,7 +15,7 @@ export const CLIENT_TYPE_META: Record<string, ClientTypeMeta> = {
   'openai-completions': {
     value: 'openai-completions',
     label: 'OpenAI Completions',
-    hint: '/v1/chat/completions',
+    hint: '/v1/models',
   },
   'anthropic-messages': {
     value: 'anthropic-messages',