chore(ConfigManager): try fetching model list even when no API key is provided

Author: AnotiaWang

app/components/ConfigManager.vue

@@ -95,7 +95,6 @@
 
   // Try to find available AI models based on selected provider
   const debouncedListAiModels = useDebounceFn(async () => {
-    if (!config.value.ai.apiKey) return
     if (!aiApiBase.value || !aiApiBase.value.startsWith('http')) return
 
     try {