enhancement: set recommend model to undefined if no model available (#4296)

* enhancement: set recommend model to undefined if not lastUsedModel

* chore: update logic

web/hooks/useCreateNewThread.ts

@@ -23,6 +23,7 @@ import { isLocalEngine } from '@/utils/modelEngine'
 
 import { useActiveModel } from './useActiveModel'
 
+import useRecommendedModel from './useRecommendedModel'
 import useSetActiveThread from './useSetActiveThread'
 
 import { extensionManager } from '@/extension'
@@ -73,6 +74,8 @@ export const useCreateNewThread = () => {
   const threads = useAtomValue(threadsAtom)
   const { stopInference } = useActiveModel()
 
+  const { recommendedModel } = useRecommendedModel()
+
   const requestCreateNewThread = async (
     assistant: (ThreadAssistantInfo & { id: string; name: string }) | Assistant,
     model?: Model | undefined
@@ -81,7 +84,7 @@ export const useCreateNewThread = () => {
     setIsGeneratingResponse(false)
     stopInference()
 
-    const defaultModel = model
+    const defaultModel = model || recommendedModel
 
     if (!model) {
       // if we have model, which means user wants to create new thread from Model hub. Allow them.

web/hooks/useRecommendedModel.ts

@@ -67,6 +67,7 @@ export default function useRecommendedModel() {
     if (models.length === 0) {
       // if we have no downloaded models, then can't recommend anything
       console.debug("No downloaded models, can't recommend anything")
+      setRecommendedModel(undefined)
       return
     }
 

web/screens/Thread/ThreadCenterPanel/ChatInput/index.tsx

@@ -188,9 +188,8 @@ const ChatInput = () => {
               </Button>
             }
             disabled={
-              !isModelSupportRagAndTools &&
-              activeAssistant?.tools &&
-              activeAssistant?.tools[0]?.enabled
+              !isModelSupportRagAndTools ||
+              (activeAssistant?.tools && activeAssistant?.tools[0]?.enabled)
             }
             content={
               <>