diff --git a/components/ResearchFeedback.vue b/components/ResearchFeedback.vue
index 4d584ed..916eed7 100644
--- a/components/ResearchFeedback.vue
+++ b/components/ResearchFeedback.vue
@@ -19,7 +19,7 @@
   }>()
 
   const { t, locale } = useI18n()
-  const { config, showConfigManager } = storeToRefs(useConfigStore())
+  const { showConfigManager, isConfigValid } = storeToRefs(useConfigStore())
   const toast = useToast()
 
   const reasoningContent = ref('')
@@ -41,10 +41,7 @@
   )
 
   async function getFeedback() {
-    const aiConfig = config.value.ai
-    const webSearchConfig = config.value.webSearch
-
-    if (!aiConfig.model || !aiConfig.apiKey || !webSearchConfig.apiKey) {
+    if (!isConfigValid.value) {
       toast.add({
         title: t('index.missingConfigTitle'),
         description: t('index.missingConfigDescription'),
diff --git a/pages/index.vue b/pages/index.vue
index 33dcfde..d02d0f5 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -65,9 +65,6 @@
     researchResultInjectionKey,
   } from '~/constants/injection-keys'
 
-  const { t } = useI18n()
-  const { config } = storeToRefs(useConfigStore())
-  const toast = useToast()
   const version = useRuntimeConfig().public.version
 
   const configManagerRef = ref<InstanceType<typeof ConfigManager>>()
@@ -93,18 +90,6 @@
   provide(researchResultInjectionKey, researchResult)
 
   async function generateFeedback() {
-    const aiConfig = config.value.ai
-    const webSearchConfig = config.value.webSearch
-
-    if (!aiConfig.model || !aiConfig.apiKey || !webSearchConfig.apiKey) {
-      toast.add({
-        title: t('index.missingConfigTitle'),
-        description: t('index.missingConfigDescription'),
-        color: 'error',
-      })
-      configManagerRef.value?.show()
-      return
-    }
     feedbackRef.value?.getFeedback()
   }
 
diff --git a/stores/config.ts b/stores/config.ts
index 1192029..93d4840 100644
--- a/stores/config.ts
+++ b/stores/config.ts
@@ -30,6 +30,18 @@ export interface Config {
   webSearch: ConfigWebSearch
 }
 
+function validateConfig(config: Config) {
+  const ai = config.ai
+  if (ai.provider !== 'ollama' && !ai.apiKey) return false
+  if (typeof ai.contextSize !== 'undefined' && ai.contextSize < 0) return false
+
+  const ws = config.webSearch
+  if (!ws.apiKey) return false
+  if (typeof ws.concurrencyLimit !== 'undefined' && ws.concurrencyLimit! < 1)
+    return false
+  return true
+}
+
 export const useConfigStore = defineStore('config', () => {
   const config = useLocalStorage<Config>('deep-research-config', {
     ai: {
@@ -47,6 +59,7 @@ export const useConfigStore = defineStore('config', () => {
     'dismiss-update-version',
     '',
   )
+  const isConfigValid = computed(() => validateConfig(config.value))
 
   const aiApiBase = computed(() => {
     if (config.value.ai.provider === 'openrouter') {
@@ -65,6 +78,7 @@ export const useConfigStore = defineStore('config', () => {
 
   return {
     config: skipHydrate(config),
+    isConfigValid,
     aiApiBase,
     showConfigManager,
     dismissUpdateVersion: skipHydrate(dismissUpdateVersion),