feat: preserve token speed in the thread (#4711)

* feat: preserve token speed in the thread

* chore: lint fix

web/containers/Providers/ModelHandler.tsx

@@ -18,7 +18,7 @@ import {
   extractInferenceParams,
   ModelExtension,
 } from '@janhq/core'
-import { useAtomValue, useSetAtom } from 'jotai'
+import { useAtom, useAtomValue, useSetAtom } from 'jotai'
 import { ulid } from 'ulidx'
 
 import { activeModelAtom, stateModelAtom } from '@/hooks/useActiveModel'
@@ -75,8 +75,10 @@ export default function ModelHandler() {
   const activeThreadRef = useRef(activeThread)
   const activeModelParams = useAtomValue(getActiveThreadModelParamsAtom)
   const activeModelParamsRef = useRef(activeModelParams)
-  const setTokenSpeed = useSetAtom(tokenSpeedAtom)
+
+  const [tokenSpeed, setTokenSpeed] = useAtom(tokenSpeedAtom)
   const { engines } = useGetEngines()
+  const tokenSpeedRef = useRef(tokenSpeed)
 
   useEffect(() => {
     activeThreadRef.current = activeThread
@@ -106,6 +108,10 @@ export default function ModelHandler() {
     messageGenerationSubscriber.current = subscribedGeneratingMessage
   }, [subscribedGeneratingMessage])
 
+  useEffect(() => {
+    tokenSpeedRef.current = tokenSpeed
+  }, [tokenSpeed])
+
   const onNewMessageResponse = useCallback(
     async (message: ThreadMessage) => {
       if (message.type === MessageRequestType.Thread) {
@@ -275,6 +281,12 @@ export default function ModelHandler() {
           metadata,
         })
 
+      // Update message's metadata with token usage
+      message.metadata = {
+        ...message.metadata,
+        token_speed: tokenSpeedRef.current?.tokenSpeed,
+      }
+
       if (message.status === MessageStatus.Error) {
         message.metadata = {
           ...message.metadata,

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

@@ -122,13 +122,20 @@ const MessageContainer: React.FC<
           )}
         >
           <div>
-            {tokenSpeed &&
+            {((!!tokenSpeed &&
               tokenSpeed.message === props.id &&
-              tokenSpeed.tokenSpeed > 0 && (
-                <p className="text-xs font-medium text-[hsla(var(--text-secondary))]">
-                  Token Speed: {Number(tokenSpeed.tokenSpeed).toFixed(2)}t/s
-                </p>
-              )}
+              tokenSpeed.tokenSpeed > 0) ||
+              (props.metadata &&
+                'token_speed' in props.metadata &&
+                !!props.metadata?.token_speed)) && (
+              <p className="text-xs font-medium text-[hsla(var(--text-secondary))]">
+                Token Speed:{' '}
+                {Number(
+                  props.metadata?.token_speed ?? tokenSpeed?.tokenSpeed
+                ).toFixed(2)}
+                t/s
+              </p>
+            )}
           </div>
 
           <MessageToolbar message={props} />