diff --git a/src/components/ImageGenDrawer.tsx b/src/components/ImageGenDrawer.tsx
index 739a3d5..0414c6b 100644
--- a/src/components/ImageGenDrawer.tsx
+++ b/src/components/ImageGenDrawer.tsx
@@ -15,7 +15,7 @@ import {
 import { Button } from "@/components/ui/button";
 import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 import { PaintBucketIcon } from "lucide-react";
 
 interface Props {
@@ -27,7 +27,7 @@ interface ImageResponse {
   revised_prompt: string;
 }
 export function ImageGenDrawer({ disableFactor }: Props) {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   const [showGenImage, setShowGenImage] = useState(false);
   const [imageGenPrompt, setImageGenPrompt] = useState("");
@@ -42,7 +42,7 @@ export function ImageGenDrawer({ disableFactor }: Props) {
   useState("b64_json");
   return (
     <>
-      {ctx.chatStore.image_gen_api && ctx.chatStore.image_gen_key ? (
+      {chatStore.image_gen_api && chatStore.image_gen_key ? (
         <Drawer open={showGenImage} onOpenChange={setShowGenImage}>
           <DrawerTrigger>
             <Button
@@ -169,11 +169,11 @@ export function ImageGenDrawer({ disableFactor }: Props) {
                           body.style = imageGenStyle;
                         }
                         const resp: ImageResponse[] = (
-                          await fetch(ctx.chatStore.image_gen_api, {
+                          await fetch(chatStore.image_gen_api, {
                             method: "POST",
                             headers: {
                               "Content-Type": "application/json",
-                              Authorization: `Bearer ${ctx.chatStore.image_gen_key}`,
+                              Authorization: `Bearer ${chatStore.image_gen_key}`,
                             },
                             body: JSON.stringify(body),
                           }).then((resp) => resp.json())
@@ -187,7 +187,7 @@ export function ImageGenDrawer({ disableFactor }: Props) {
                             url = "data:image/png;base64," + image.b64_json;
                           if (!url) continue;
 
-                          ctx.chatStore.history.push({
+                          chatStore.history.push({
                             role: "assistant",
                             content: [
                               {
@@ -210,7 +210,7 @@ export function ImageGenDrawer({ disableFactor }: Props) {
                             response_model_name: imageGenModel,
                           });
 
-                          ctx.setChatStore({ ...ctx.chatStore });
+                          setChatStore({ ...chatStore });
                         }
                       } catch (e) {
                         console.error(e);
diff --git a/src/components/ListAPI.tsx b/src/components/ListAPI.tsx
index 5ae9600..a5929e7 100644
--- a/src/components/ListAPI.tsx
+++ b/src/components/ListAPI.tsx
@@ -11,7 +11,7 @@ import {
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
 import { useContext } from "react";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 import {
   NavigationMenu,
   NavigationMenuList,
@@ -37,26 +37,26 @@ import { newChatStore } from "@/types/newChatstore";
 interface APITemplateDropdownProps {
   label: string;
   shortLabel: string;
-  ctx: any;
   apiField: string;
   keyField: string;
 }
 function APIsDropdownList({
   label,
   shortLabel,
-  ctx,
   apiField,
   keyField,
 }: APITemplateDropdownProps) {
-  let API = ctx.templateAPIs;
+  const ctxAppChatStore = useContext(AppChatStoreContext);
+  const ctxApp = useContext(AppContext);
+  let API = ctxApp.templateAPIs;
   if (label === "Chat API") {
-    API = ctx.templateAPIs;
+    API = ctxApp.templateAPIs;
   } else if (label === "Whisper API") {
-    API = ctx.templateAPIsWhisper;
+    API = ctxApp.templateAPIsWhisper;
   } else if (label === "TTS API") {
-    API = ctx.templateAPIsTTS;
+    API = ctxApp.templateAPIsTTS;
   } else if (label === "Image Gen API") {
-    API = ctx.templateAPIsImageGen;
+    API = ctxApp.templateAPIsImageGen;
   }
 
   return (
@@ -67,14 +67,17 @@ function APIsDropdownList({
           {label}{" "}
           {API.find(
             (t: TemplateAPI) =>
-              ctx.chatStore[apiField as keyof ChatStore] === t.endpoint &&
-              ctx.chatStore[keyField as keyof ChatStore] === t.key
+              ctxAppChatStore.chatStore[apiField as keyof ChatStore] ===
+                t.endpoint &&
+              ctxAppChatStore.chatStore[keyField as keyof ChatStore] === t.key
           )?.name &&
             `: ${
               API.find(
                 (t: TemplateAPI) =>
-                  ctx.chatStore[apiField as keyof ChatStore] === t.endpoint &&
-                  ctx.chatStore[keyField as keyof ChatStore] === t.key
+                  ctxAppChatStore.chatStore[apiField as keyof ChatStore] ===
+                    t.endpoint &&
+                  ctxAppChatStore.chatStore[keyField as keyof ChatStore] ===
+                    t.key
               )?.name
             }`}
         </span>
@@ -87,15 +90,20 @@ function APIsDropdownList({
                 <a
                   onClick={() => {
                     // @ts-ignore
-                    ctx.chatStore[apiField as keyof ChatStore] = t.endpoint;
+                    ctxAppChatStore.chatStore[apiField as keyof ChatStore] =
+                      t.endpoint;
                     // @ts-ignore
-                    ctx.chatStore[keyField] = t.key;
-                    ctx.setChatStore({ ...ctx.chatStore });
+                    ctxAppChatStore.chatStore[keyField] = t.key;
+                    ctxAppChatStore.setChatStore({
+                      ...ctxAppChatStore.chatStore,
+                    });
                   }}
                   className={cn(
                     "block select-none space-y-1 rounded-md p-3 leading-none no-underline outline-none transition-colors hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground",
-                    ctx.chatStore[apiField as keyof ChatStore] === t.endpoint &&
-                      ctx.chatStore[keyField as keyof ChatStore] === t.key
+                    ctxAppChatStore.chatStore[apiField as keyof ChatStore] ===
+                      t.endpoint &&
+                      ctxAppChatStore.chatStore[keyField as keyof ChatStore] ===
+                        t.key
                       ? "bg-accent text-accent-foreground"
                       : ""
                   )}
@@ -117,11 +125,11 @@ function APIsDropdownList({
 }
 
 function ToolsDropdownList() {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   const { toast } = useToast();
   const [open, setOpen] = React.useState(false);
 
-  const { chatStore, setChatStore } = ctx;
+  const ctx = useContext(AppContext);
 
   return (
     <div className="flex items-center space-x-4 mx-3">
@@ -189,7 +197,8 @@ function ToolsDropdownList() {
 function ChatTemplateDropdownList() {
   const ctx = useContext(AppContext);
 
-  const { chatStore, setChatStore, templates } = ctx;
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
+  const { templates } = useContext(AppContext);
 
   return (
     <NavigationMenuItem>
@@ -245,7 +254,6 @@ const APIListMenu: React.FC = () => {
             <APIsDropdownList
               label="Chat API"
               shortLabel="Chat"
-              ctx={ctx}
               apiField="apiEndpoint"
               keyField="apiKey"
             />
@@ -254,7 +262,6 @@ const APIListMenu: React.FC = () => {
             <APIsDropdownList
               label="Whisper API"
               shortLabel="Whisper"
-              ctx={ctx}
               apiField="whisper_api"
               keyField="whisper_key"
             />
@@ -263,7 +270,6 @@ const APIListMenu: React.FC = () => {
             <APIsDropdownList
               label="TTS API"
               shortLabel="TTS"
-              ctx={ctx}
               apiField="tts_api"
               keyField="tts_key"
             />
@@ -272,7 +278,6 @@ const APIListMenu: React.FC = () => {
             <APIsDropdownList
               label="Image Gen API"
               shortLabel="ImgGen"
-              ctx={ctx}
               apiField="image_gen_api"
               keyField="image_gen_key"
             />
diff --git a/src/components/MessageBubble.tsx b/src/components/MessageBubble.tsx
index 186385f..14fc7e6 100644
--- a/src/components/MessageBubble.tsx
+++ b/src/components/MessageBubble.tsx
@@ -25,7 +25,7 @@ import {
   AudioLinesIcon,
   LoaderCircleIcon,
 } from "lucide-react";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 
 interface HideMessageProps {
   chat: ChatStoreMessage;
@@ -171,27 +171,27 @@ export function TTSPlay(props: TTSPlayProps) {
 }
 function TTSButton(props: TTSProps) {
   const [generating, setGenerating] = useState(false);
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   return (
     <Button
       variant="ghost"
       size="icon"
       onClick={() => {
-        const api = ctx.chatStore.tts_api;
-        const api_key = ctx.chatStore.tts_key;
+        const api = chatStore.tts_api;
+        const api_key = chatStore.tts_key;
         const model = "tts-1";
         const input = getMessageText(props.chat);
-        const voice = ctx.chatStore.tts_voice;
+        const voice = chatStore.tts_voice;
 
         const body: Record<string, any> = {
           model,
           input,
           voice,
-          response_format: ctx.chatStore.tts_format || "mp3",
+          response_format: chatStore.tts_format || "mp3",
         };
-        if (ctx.chatStore.tts_speed_enabled) {
-          body["speed"] = ctx.chatStore.tts_speed;
+        if (chatStore.tts_speed_enabled) {
+          body["speed"] = chatStore.tts_speed;
         }
 
         setGenerating(true);
@@ -208,13 +208,13 @@ function TTSButton(props: TTSProps) {
           .then((blob) => {
             // update price
             const cost = (input.length * 0.015) / 1000;
-            ctx.chatStore.cost += cost;
+            chatStore.cost += cost;
             addTotalCost(cost);
-            ctx.setChatStore({ ...ctx.chatStore });
+            setChatStore({ ...chatStore });
 
             // save blob
             props.chat.audio = blob;
-            ctx.setChatStore({ ...ctx.chatStore });
+            setChatStore({ ...chatStore });
 
             const url = URL.createObjectURL(blob);
             const audio = new Audio(url);
@@ -235,9 +235,8 @@ function TTSButton(props: TTSProps) {
 }
 
 export default function Message(props: { messageIndex: number }) {
-  const ctx = useContext(AppContext);
   const { messageIndex } = props;
-  const { chatStore, setChatStore } = ctx;
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   const chat = chatStore.history[messageIndex];
   const [showEdit, setShowEdit] = useState(false);
@@ -301,8 +300,7 @@ export default function Message(props: { messageIndex: number }) {
             <Markdown>{getMessageText(chat)}</Markdown>
           ) : (
             <div className="message-content">
-              {ctx &&
-                chat.content &&
+              {chat.content &&
                 (chat.logprobs && renderColor
                   ? chat.logprobs.content
                       .filter((c) => c.token)
diff --git a/src/components/Search.tsx b/src/components/Search.tsx
index bf376d4..e49d9ce 100644
--- a/src/components/Search.tsx
+++ b/src/components/Search.tsx
@@ -21,7 +21,7 @@ import {
 } from "@/components/ui/pagination";
 
 import { Input } from "./ui/input";
-import { AppContext } from "../pages/App";
+import { App, AppContext } from "../pages/App";
 import { Button } from "./ui/button";
 import { SearchIcon } from "lucide-react";
 
@@ -33,8 +33,7 @@ interface ChatStoreSearchResult {
 }
 
 export default function Search() {
-  const ctx = useContext(AppContext);
-  const { setSelectedChatIndex, db } = ctx;
+  const { setSelectedChatIndex, db } = useContext(AppContext);
 
   const [searchResult, setSearchResult] = useState<ChatStoreSearchResult[]>([]);
   const [searching, setSearching] = useState<boolean>(false);
diff --git a/src/components/Settings.tsx b/src/components/Settings.tsx
index e2a9bb5..c6491a9 100644
--- a/src/components/Settings.tsx
+++ b/src/components/Settings.tsx
@@ -75,7 +75,7 @@ import {
 import { Separator } from "@/components/ui/separator";
 import { Slider } from "@/components/ui/slider";
 import { NonOverflowScrollArea, ScrollArea } from "@/components/ui/scroll-area";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 
 const TTS_VOICES: string[] = [
   "alloy",
@@ -96,11 +96,11 @@ const Help = (props: { children: any; help: string; field: string }) => {
 };
 
 const SelectModel = (props: { help: string }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   let shouldIUseCustomModel: boolean = true;
   for (const model in models) {
-    if (ctx.chatStore.model === model) {
+    if (chatStore.model === model) {
       shouldIUseCustomModel = false;
     }
   }
@@ -140,22 +140,22 @@ const SelectModel = (props: { help: string }) => {
 
       {useCustomModel ? (
         <Input
-          value={ctx.chatStore.model}
+          value={chatStore.model}
           onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
-            ctx.chatStore.model = e.target.value;
-            ctx.setChatStore({ ...ctx.chatStore });
+            chatStore.model = e.target.value;
+            setChatStore({ ...chatStore });
           }}
         />
       ) : (
         <Select
-          value={ctx.chatStore.model}
+          value={chatStore.model}
           onValueChange={(model: string) => {
-            ctx.chatStore.model = model;
-            ctx.chatStore.maxTokens = getDefaultParams(
+            chatStore.model = model;
+            chatStore.maxTokens = getDefaultParams(
               "max",
               models[model].maxToken
             );
-            ctx.setChatStore({ ...ctx.chatStore });
+            setChatStore({ ...chatStore });
           }}
         >
           <SelectTrigger className="w-full">
@@ -182,7 +182,7 @@ const LongInput = (props: {
   label: string;
   help: string;
 }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   return (
     <div>
       <Label htmlFor="name" className="text-right">
@@ -204,10 +204,10 @@ const LongInput = (props: {
 
       <Textarea
         className="h-24 w-full"
-        value={ctx.chatStore[props.field]}
+        value={chatStore[props.field]}
         onChange={(event: any) => {
-          ctx.chatStore[props.field] = event.target.value;
-          ctx.setChatStore({ ...ctx.chatStore });
+          chatStore[props.field] = event.target.value;
+          setChatStore({ ...chatStore });
           autoHeight(event.target);
         }}
         onKeyPress={(event: any) => {
@@ -230,7 +230,7 @@ const InputField = (props: {
     | "image_gen_key";
   help: string;
 }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   const [hideInput, setHideInput] = useState(true);
   return (
     <>
@@ -256,10 +256,10 @@ const InputField = (props: {
         <div className="flex w-full items-center space-x-2">
           <Input
             type={hideInput ? "password" : "text"}
-            value={ctx.chatStore[props.field]}
+            value={chatStore[props.field]}
             onChange={(event: React.ChangeEvent<HTMLInputElement>) => {
-              ctx.chatStore[props.field] = event.target.value;
-              ctx.setChatStore({ ...ctx.chatStore });
+              chatStore[props.field] = event.target.value;
+              setChatStore({ ...chatStore });
             }}
           />
           <Button
@@ -285,24 +285,24 @@ const Slicer = (props: {
   min: number;
   max: number;
 }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   const enable_filed_name: "temperature_enabled" | "top_p_enabled" =
     `${props.field}_enabled` as any;
 
-  const enabled = ctx.chatStore[enable_filed_name];
+  const enabled = chatStore[enable_filed_name];
 
   if (enabled === null || enabled === undefined) {
     if (props.field === "temperature") {
-      ctx.chatStore[enable_filed_name] = true;
+      chatStore[enable_filed_name] = true;
     }
     if (props.field === "top_p") {
-      ctx.chatStore[enable_filed_name] = false;
+      chatStore[enable_filed_name] = false;
     }
   }
 
   const setEnabled = (state: boolean) => {
-    ctx.chatStore[enable_filed_name] = state;
-    ctx.setChatStore({ ...ctx.chatStore });
+    chatStore[enable_filed_name] = state;
+    setChatStore({ ...chatStore });
   };
   return (
     <div className="space-y-2">
@@ -323,10 +323,10 @@ const Slicer = (props: {
           </DialogContent>
         </Dialog>
         <Checkbox
-          checked={ctx.chatStore[enable_filed_name]}
+          checked={chatStore[enable_filed_name]}
           onCheckedChange={(checked: boolean) => setEnabled(!!checked)}
         />
-        {!ctx.chatStore[enable_filed_name] && (
+        {!chatStore[enable_filed_name] && (
           <span className="text-xs text-muted-foreground">disabled</span>
         )}
       </Label>
@@ -339,10 +339,10 @@ const Slicer = (props: {
               min={props.min}
               max={props.max}
               step={0.01}
-              value={[ctx.chatStore[props.field]]}
+              value={[chatStore[props.field]]}
               onValueChange={(value) => {
-                ctx.chatStore[props.field] = value[0];
-                ctx.setChatStore({ ...ctx.chatStore });
+                chatStore[props.field] = value[0];
+                setChatStore({ ...chatStore });
               }}
             />
           </div>
@@ -350,11 +350,11 @@ const Slicer = (props: {
             type="number"
             disabled={!enabled}
             className="w-24"
-            value={ctx.chatStore[props.field]}
+            value={chatStore[props.field]}
             onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
               const value = parseFloat(e.target.value);
-              ctx.chatStore[props.field] = value;
-              ctx.setChatStore({ ...ctx.chatStore });
+              chatStore[props.field] = value;
+              setChatStore({ ...chatStore });
             }}
           />
         </div>
@@ -375,7 +375,7 @@ const Number = (props: {
   readOnly: boolean;
   help: string;
 }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   return (
     <div className="space-y-2">
       <Label className="flex items-center gap-2">
@@ -397,12 +397,12 @@ const Number = (props: {
 
         {props.field === "maxGenTokens" && (
           <Checkbox
-            checked={ctx.chatStore.maxGenTokens_enabled}
+            checked={chatStore.maxGenTokens_enabled}
             onCheckedChange={() => {
-              const newChatStore = { ...ctx.chatStore };
+              const newChatStore = { ...chatStore };
               newChatStore.maxGenTokens_enabled =
                 !newChatStore.maxGenTokens_enabled;
-              ctx.setChatStore({ ...newChatStore });
+              setChatStore({ ...newChatStore });
             }}
           />
         )}
@@ -412,14 +412,14 @@ const Number = (props: {
         type="number"
         readOnly={props.readOnly}
         disabled={
-          props.field === "maxGenTokens" && !ctx.chatStore.maxGenTokens_enabled
+          props.field === "maxGenTokens" && !chatStore.maxGenTokens_enabled
         }
-        value={ctx.chatStore[props.field]}
+        value={chatStore[props.field]}
         onChange={(event: React.ChangeEvent<HTMLInputElement>) => {
           let newNumber = parseFloat(event.target.value);
           if (newNumber < 0) newNumber = 0;
-          ctx.chatStore[props.field] = newNumber;
-          ctx.setChatStore({ ...ctx.chatStore });
+          chatStore[props.field] = newNumber;
+          setChatStore({ ...chatStore });
         }}
       />
     </div>
@@ -430,17 +430,17 @@ const Choice = (props: {
   field: "streamMode" | "develop_mode" | "json_mode" | "logprobs";
   help: string;
 }) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   return (
     <div className="flex items-center space-x-2">
       <div className="flex items-center">
         <Checkbox
           id={`${props.field}-checkbox`}
-          checked={ctx.chatStore[props.field]}
+          checked={chatStore[props.field]}
           onCheckedChange={(checked: boolean) => {
-            ctx.chatStore[props.field] = checked;
-            ctx.setChatStore({ ...ctx.chatStore });
+            chatStore[props.field] = checked;
+            setChatStore({ ...chatStore });
           }}
         />
       </div>
@@ -468,13 +468,27 @@ const Choice = (props: {
 };
 
 const APIShowBlock = (props: {
-  ctx: any;
   index: number;
   label: string;
   type: string;
   apiField: string;
   keyField: string;
 }) => {
+  const {
+    templates,
+    setTemplates,
+    templateAPIs,
+    setTemplateAPIs,
+    templateAPIsWhisper,
+    setTemplateAPIsWhisper,
+    templateAPIsTTS,
+    setTemplateAPIsTTS,
+    templateAPIsImageGen,
+    setTemplateAPIsImageGen,
+    templateTools,
+    setTemplateTools,
+    selectedChatIndex,
+  } = useContext(AppContext);
   return (
     <div className="border-b border-gray-200 pb-4 pt-4">
       <Badge variant="outline">{props.type}</Badge> <Label>{props.label}</Label>
@@ -506,23 +520,17 @@ const APIShowBlock = (props: {
           const name = prompt(`Give template ${props.label} a new name`);
           if (!name) return;
           if (props.type === "Chat") {
-            props.ctx.templateAPIs[props.index].name = name;
-            props.ctx.setTemplateAPIs(structuredClone(props.ctx.templateAPIs));
+            templateAPIs[props.index].name = name;
+            setTemplateAPIs(structuredClone(templateAPIs));
           } else if (props.type === "Whisper") {
-            props.ctx.templateAPIsWhisper[props.index].name = name;
-            props.ctx.setTemplateAPIsWhisper(
-              structuredClone(props.ctx.templateAPIsWhisper)
-            );
+            templateAPIsWhisper[props.index].name = name;
+            setTemplateAPIsWhisper(structuredClone(templateAPIsWhisper));
           } else if (props.type === "TTS") {
-            props.ctx.templateAPIsTTS[props.index].name = name;
-            props.ctx.setTemplateAPIsTTS(
-              structuredClone(props.ctx.templateAPIsTTS)
-            );
+            templateAPIsTTS[props.index].name = name;
+            setTemplateAPIsTTS(structuredClone(templateAPIsTTS));
           } else if (props.type === "ImgGen") {
-            props.ctx.templateAPIsImageGen[props.index].name = name;
-            props.ctx.setTemplateAPIsImageGen(
-              structuredClone(props.ctx.templateAPIsImageGen)
-            );
+            templateAPIsImageGen[props.index].name = name;
+            setTemplateAPIsImageGen(structuredClone(templateAPIsImageGen));
           }
         }}
       >
@@ -533,7 +541,6 @@ const APIShowBlock = (props: {
         size="sm"
         className="mt-2"
         onClick={() => {
-          if (!props.ctx) return;
           if (
             !confirm(
               `Are you sure to delete ${props.label}(${props.type}) API?`
@@ -542,23 +549,17 @@ const APIShowBlock = (props: {
             return;
           }
           if (props.type === "Chat") {
-            props.ctx.templateAPIs.splice(props.index, 1);
-            props.ctx.setTemplateAPIs(structuredClone(props.ctx.templateAPIs));
+            templateAPIs.splice(props.index, 1);
+            setTemplateAPIs(structuredClone(templateAPIs));
           } else if (props.type === "Whisper") {
-            props.ctx.templateAPIsWhisper.splice(props.index, 1);
-            props.ctx.setTemplateAPIsWhisper(
-              structuredClone(props.ctx.templateAPIsWhisper)
-            );
+            templateAPIsWhisper.splice(props.index, 1);
+            setTemplateAPIsWhisper(structuredClone(templateAPIsWhisper));
           } else if (props.type === "TTS") {
-            props.ctx.templateAPIsTTS.splice(props.index, 1);
-            props.ctx.setTemplateAPIsTTS(
-              structuredClone(props.ctx.templateAPIsTTS)
-            );
+            templateAPIsTTS.splice(props.index, 1);
+            setTemplateAPIsTTS(structuredClone(templateAPIsTTS));
           } else if (props.type === "ImgGen") {
-            props.ctx.templateAPIsImageGen.splice(props.index, 1);
-            props.ctx.setTemplateAPIsImageGen(
-              structuredClone(props.ctx.templateAPIsImageGen)
-            );
+            templateAPIsImageGen.splice(props.index, 1);
+            setTemplateAPIsImageGen(structuredClone(templateAPIsImageGen));
           }
         }}
       >
@@ -569,11 +570,25 @@ const APIShowBlock = (props: {
 };
 
 const ToolsShowBlock = (props: {
-  ctx: any;
   index: number;
   label: string;
   content: string;
 }) => {
+  const {
+    templates,
+    setTemplates,
+    templateAPIs,
+    setTemplateAPIs,
+    templateAPIsWhisper,
+    setTemplateAPIsWhisper,
+    templateAPIsTTS,
+    setTemplateAPIsTTS,
+    templateAPIsImageGen,
+    setTemplateAPIsImageGen,
+    templateTools,
+    setTemplateTools,
+    selectedChatIndex,
+  } = useContext(AppContext);
   return (
     <div className="border-b border-gray-200 pb-4 pt-4">
       <Badge variant="outline">Tool</Badge> <Label>{props.label}</Label>
@@ -594,8 +609,8 @@ const ToolsShowBlock = (props: {
         onClick={() => {
           const name = prompt(`Give the tool ${props.label} a new name`);
           if (!name) return;
-          props.ctx.templateTools[props.index].name = name;
-          props.ctx.setTemplateTools(structuredClone(props.ctx.templateTools));
+          templateTools[props.index].name = name;
+          setTemplateTools(structuredClone(templateTools));
         }}
       >
         Edit
@@ -605,12 +620,11 @@ const ToolsShowBlock = (props: {
         size="sm"
         className="mt-2"
         onClick={() => {
-          if (!props.ctx) return;
           if (!confirm(`Are you sure to delete ${props.label} Tool?`)) {
             return;
           }
-          props.ctx.templateTools.splice(props.index, 1);
-          props.ctx.setTemplateTools(structuredClone(props.ctx.templateTools));
+          templateTools.splice(props.index, 1);
+          setTemplateTools(structuredClone(templateTools));
         }}
       >
         Delete
@@ -620,19 +634,34 @@ const ToolsShowBlock = (props: {
 };
 
 export default (props: {}) => {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
+  const {
+    templates,
+    setTemplates,
+    templateAPIs,
+    setTemplateAPIs,
+    templateAPIsWhisper,
+    setTemplateAPIsWhisper,
+    templateAPIsTTS,
+    setTemplateAPIsTTS,
+    templateAPIsImageGen,
+    setTemplateAPIsImageGen,
+    templateTools,
+    setTemplateTools,
+    selectedChatIndex,
+  } = useContext(AppContext);
 
   let link =
     location.protocol +
     "//" +
     location.host +
     location.pathname +
-    `?key=${encodeURIComponent(ctx.chatStore.apiKey)}&api=${encodeURIComponent(
-      ctx.chatStore.apiEndpoint
-    )}&mode=${ctx.chatStore.streamMode ? "stream" : "fetch"}&model=${
-      ctx.chatStore.model
-    }&sys=${encodeURIComponent(ctx.chatStore.systemMessageContent)}`;
-  if (ctx.chatStore.develop_mode) {
+    `?key=${encodeURIComponent(chatStore.apiKey)}&api=${encodeURIComponent(
+      chatStore.apiEndpoint
+    )}&mode=${chatStore.streamMode ? "stream" : "fetch"}&model=${
+      chatStore.model
+    }&sys=${encodeURIComponent(chatStore.systemMessageContent)}`;
+  if (chatStore.develop_mode) {
     link = link + `&dev=true`;
   }
 
@@ -662,7 +691,7 @@ export default (props: {}) => {
       <SheetTrigger asChild>
         <Button variant="outline" className="flex-grow">
           {Tr("Settings")}
-          {(!ctx.chatStore.apiKey || !ctx.chatStore.apiEndpoint) && (
+          {(!chatStore.apiKey || !chatStore.apiEndpoint) && (
             <TriangleAlertIcon className="w-4 h-4 ml-1 text-yellow-500" />
           )}
         </Button>
@@ -693,7 +722,7 @@ export default (props: {}) => {
                           $ USD
                         </span>
                         <span className="text-lg font-bold leading-none sm:text-3xl">
-                          {ctx.chatStore.cost?.toFixed(4)}
+                          {chatStore.cost?.toFixed(4)}
                         </span>
                       </div>
                     </div>
@@ -714,7 +743,7 @@ export default (props: {}) => {
                 />
                 <span className="pt-1">
                   JSON Check:{" "}
-                  {isVailedJSON(ctx.chatStore.toolsString) ? (
+                  {isVailedJSON(chatStore.toolsString) ? (
                     <CheckIcon className="inline w-3 h-3" />
                   ) : (
                     <BanIcon className="inline w-3 h-3" />
@@ -722,7 +751,7 @@ export default (props: {}) => {
                 </span>
                 <div className="box">
                   <div className="flex justify-evenly flex-wrap">
-                    {ctx.chatStore.toolsString.trim() && (
+                    {chatStore.toolsString.trim() && (
                       <Dialog>
                         <DialogTrigger asChild>
                           <Button variant="outline">{Tr(`Save Tools`)}</Button>
@@ -772,10 +801,10 @@ export default (props: {}) => {
                                   }
                                   const newToolsTmp: TemplateTools = {
                                     name: name.value,
-                                    toolsString: ctx.chatStore.toolsString,
+                                    toolsString: chatStore.toolsString,
                                   };
-                                  ctx.templateTools.push(newToolsTmp);
-                                  ctx.setTemplateTools([...ctx.templateTools]);
+                                  templateTools.push(newToolsTmp);
+                                  setTemplateTools([...templateTools]);
                                 }}
                               >
                                 <SaveIcon className="w-4 h-4" /> Save
@@ -884,12 +913,11 @@ export default (props: {}) => {
                               <Button
                                 variant="destructive"
                                 onClick={() => {
-                                  ctx.chatStore.history =
-                                    ctx.chatStore.history.filter(
-                                      (msg) => msg.example && !msg.hide
-                                    );
-                                  ctx.chatStore.postBeginIndex = 0;
-                                  ctx.setChatStore({ ...ctx.chatStore });
+                                  chatStore.history = chatStore.history.filter(
+                                    (msg) => msg.example && !msg.hide
+                                  );
+                                  chatStore.postBeginIndex = 0;
+                                  setChatStore({ ...chatStore });
                                 }}
                               >
                                 Yes, clear all history
@@ -905,14 +933,14 @@ export default (props: {}) => {
                             let dataStr =
                               "data:text/json;charset=utf-8," +
                               encodeURIComponent(
-                                JSON.stringify(ctx.chatStore, null, "\t")
+                                JSON.stringify(chatStore, null, "\t")
                               );
                             let downloadAnchorNode =
                               document.createElement("a");
                             downloadAnchorNode.setAttribute("href", dataStr);
                             downloadAnchorNode.setAttribute(
                               "download",
-                              `chatgpt-api-web-${ctx.selectedChatIndex}.json`
+                              `chatgpt-api-web-${selectedChatIndex}.json`
                             );
                             document.body.appendChild(downloadAnchorNode);
                             downloadAnchorNode.click();
@@ -933,14 +961,12 @@ export default (props: {}) => {
                               alert(tr("No template name specified", langCode));
                               return;
                             }
-                            const tmp: ChatStore = structuredClone(
-                              ctx.chatStore
-                            );
+                            const tmp: ChatStore = structuredClone(chatStore);
                             tmp.history = tmp.history.filter((h) => h.example);
                             // @ts-ignore
                             tmp.name = name;
-                            ctx.templates.push(tmp as TemplateChatStore);
-                            ctx.setTemplates([...ctx.templates]);
+                            templates.push(tmp as TemplateChatStore);
+                            setTemplates([...templates]);
                           }}
                         >
                           {Tr("As template")}
@@ -992,7 +1018,7 @@ export default (props: {}) => {
                                     langCode
                                   );
                                 }
-                                ctx.setChatStore({ ...newChatStore });
+                                setChatStore({ ...newChatStore });
                               } catch (e) {
                                 alert(
                                   tr(
@@ -1034,10 +1060,10 @@ export default (props: {}) => {
                     />
                     <SetAPIsTemplate
                       label="Chat API"
-                      endpoint={ctx.chatStore.apiEndpoint}
-                      APIkey={ctx.chatStore.apiKey}
-                      temps={ctx.templateAPIs}
-                      setTemps={ctx.setTemplateAPIs}
+                      endpoint={chatStore.apiEndpoint}
+                      APIkey={chatStore.apiKey}
+                      temps={templateAPIs}
+                      setTemps={setTemplateAPIs}
                     />
                   </CardContent>
                 </Card>
@@ -1139,10 +1165,10 @@ export default (props: {}) => {
                       />
                       <SetAPIsTemplate
                         label="Whisper API"
-                        endpoint={ctx.chatStore.whisper_api}
-                        APIkey={ctx.chatStore.whisper_key}
-                        temps={ctx.templateAPIsWhisper}
-                        setTemps={ctx.setTemplateAPIsWhisper}
+                        endpoint={chatStore.whisper_api}
+                        APIkey={chatStore.whisper_key}
+                        temps={templateAPIsWhisper}
+                        setTemps={setTemplateAPIsWhisper}
                       />
                     </CardContent>
                   </Card>
@@ -1172,10 +1198,10 @@ export default (props: {}) => {
                     />
                     <SetAPIsTemplate
                       label="TTS API"
-                      endpoint={ctx.chatStore.tts_api}
-                      APIkey={ctx.chatStore.tts_key}
-                      temps={ctx.templateAPIsTTS}
-                      setTemps={ctx.setTemplateAPIsTTS}
+                      endpoint={chatStore.tts_api}
+                      APIkey={chatStore.tts_key}
+                      temps={templateAPIsTTS}
+                      setTemps={setTemplateAPIsTTS}
                     />
                   </CardContent>
                 </Card>
@@ -1200,10 +1226,10 @@ export default (props: {}) => {
                       </Dialog>
                     </Label>
                     <Select
-                      value={ctx.chatStore.tts_voice}
+                      value={chatStore.tts_voice}
                       onValueChange={(value) => {
-                        ctx.chatStore.tts_voice = value;
-                        ctx.setChatStore({ ...ctx.chatStore });
+                        chatStore.tts_voice = value;
+                        setChatStore({ ...chatStore });
                       }}
                     >
                       <SelectTrigger className="w-full">
@@ -1250,10 +1276,10 @@ export default (props: {}) => {
                       </Dialog>
                     </Label>
                     <Select
-                      value={ctx.chatStore.tts_format}
+                      value={chatStore.tts_format}
                       onValueChange={(value) => {
-                        ctx.chatStore.tts_format = value;
-                        ctx.setChatStore({ ...ctx.chatStore });
+                        chatStore.tts_format = value;
+                        setChatStore({ ...chatStore });
                       }}
                     >
                       <SelectTrigger className="w-full">
@@ -1297,10 +1323,10 @@ export default (props: {}) => {
                     />
                     <SetAPIsTemplate
                       label="Image Gen API"
-                      endpoint={ctx.chatStore.image_gen_api}
-                      APIkey={ctx.chatStore.image_gen_key}
-                      temps={ctx.templateAPIsImageGen}
-                      setTemps={ctx.setTemplateAPIsImageGen}
+                      endpoint={chatStore.image_gen_api}
+                      APIkey={chatStore.image_gen_key}
+                      temps={templateAPIsImageGen}
+                      setTemps={setTemplateAPIsImageGen}
                     />
                   </CardContent>
                 </Card>
@@ -1309,10 +1335,9 @@ export default (props: {}) => {
             <AccordionItem value="templates">
               <AccordionTrigger>Saved Template</AccordionTrigger>
               <AccordionContent>
-                {ctx.templateAPIs.map((template, index) => (
+                {templateAPIs.map((template, index) => (
                   <div key={index}>
                     <APIShowBlock
-                      ctx={ctx}
                       index={index}
                       label={template.name}
                       type="Chat"
@@ -1321,10 +1346,9 @@ export default (props: {}) => {
                     />
                   </div>
                 ))}
-                {ctx.templateAPIsWhisper.map((template, index) => (
+                {templateAPIsWhisper.map((template, index) => (
                   <div key={index}>
                     <APIShowBlock
-                      ctx={ctx}
                       index={index}
                       label={template.name}
                       type="Whisper"
@@ -1333,10 +1357,9 @@ export default (props: {}) => {
                     />
                   </div>
                 ))}
-                {ctx.templateAPIsTTS.map((template, index) => (
+                {templateAPIsTTS.map((template, index) => (
                   <div key={index}>
                     <APIShowBlock
-                      ctx={ctx}
                       index={index}
                       label={template.name}
                       type="TTS"
@@ -1345,10 +1368,9 @@ export default (props: {}) => {
                     />
                   </div>
                 ))}
-                {ctx.templateAPIsImageGen.map((template, index) => (
+                {templateAPIsImageGen.map((template, index) => (
                   <div key={index}>
                     <APIShowBlock
-                      ctx={ctx}
                       index={index}
                       label={template.name}
                       type="ImgGen"
@@ -1357,10 +1379,9 @@ export default (props: {}) => {
                     />
                   </div>
                 ))}
-                {ctx.templateTools.map((template, index) => (
+                {templateTools.map((template, index) => (
                   <div key={index}>
                     <ToolsShowBlock
-                      ctx={ctx}
                       index={index}
                       label={template.name}
                       content={template.toolsString}
@@ -1373,7 +1394,7 @@ export default (props: {}) => {
           <div className="pt-4 space-y-2">
             <p className="text-sm text-muted-foreground text-center">
               chatgpt-api-web ChatStore {Tr("Version")}{" "}
-              {ctx.chatStore.chatgpt_api_web_version}
+              {chatStore.chatgpt_api_web_version}
             </p>
             <p className="text-sm text-muted-foreground text-center">
               {Tr("Documents and source code are avaliable here")}:{" "}
diff --git a/src/components/Templates.tsx b/src/components/Templates.tsx
index 07856b5..f213733 100644
--- a/src/components/Templates.tsx
+++ b/src/components/Templates.tsx
@@ -1,4 +1,4 @@
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 import { TemplateChatStore } from "@/types/chatstore";
 import { ChatStore } from "@/types/chatstore";
 import { getDefaultParams } from "@/utils/getDefaultParam";
@@ -6,7 +6,8 @@ import { useContext } from "react";
 
 const Templates = () => {
   const ctx = useContext(AppContext);
-  const { templates, chatStore, setChatStore, setTemplates } = ctx;
+  const { templates, setTemplates } = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   return (
     <>
diff --git a/src/components/VersionHint.tsx b/src/components/VersionHint.tsx
index 068f33f..8a19460 100644
--- a/src/components/VersionHint.tsx
+++ b/src/components/VersionHint.tsx
@@ -1,12 +1,10 @@
 import { ChatStore } from "@/types/chatstore";
 import { Tr } from "@/translate";
 import { useContext } from "react";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 
 const VersionHint = () => {
-  const ctx = useContext(AppContext);
-
-  const { chatStore } = ctx;
+  const { chatStore } = useContext(AppChatStoreContext);
   return (
     <>
       {chatStore.chatgpt_api_web_version < "v1.3.0" && (
diff --git a/src/components/WhisperButton.tsx b/src/components/WhisperButton.tsx
index a50de8b..cf4848e 100644
--- a/src/components/WhisperButton.tsx
+++ b/src/components/WhisperButton.tsx
@@ -3,14 +3,13 @@ import { createRef, useContext } from "react";
 import { useState, Dispatch } from "react";
 import { Button } from "@/components/ui/button";
 import { AudioWaveformIcon, CircleStopIcon, MicIcon } from "lucide-react";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 
 const WhisperButton = (props: {
   inputMsg: string;
   setInputMsg: Dispatch<string>;
 }) => {
-  const ctx = useContext(AppContext);
-  const { chatStore } = ctx;
+  const { chatStore } = useContext(AppChatStoreContext);
 
   const { inputMsg, setInputMsg } = props;
   const mediaRef = createRef();
diff --git a/src/components/editMessage.tsx b/src/components/editMessage.tsx
index 3c7dc1d..e16002e 100644
--- a/src/components/editMessage.tsx
+++ b/src/components/editMessage.tsx
@@ -13,7 +13,7 @@ import {
   DialogTrigger,
 } from "@/components/ui/dialog";
 import { Button } from "./ui/button";
-import { AppContext } from "../pages/App";
+import { AppChatStoreContext, AppContext } from "../pages/App";
 
 interface EditMessageProps {
   chat: ChatStoreMessage;
@@ -21,7 +21,7 @@ interface EditMessageProps {
   setShowEdit: Dispatch<boolean>;
 }
 export function EditMessage(props: EditMessageProps) {
-  const ctx = useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   const { showEdit, setShowEdit, chat } = props;
 
@@ -42,7 +42,7 @@ export function EditMessage(props: EditMessageProps) {
         ) : (
           <EditMessageDetail chat={chat} setShowEdit={setShowEdit} />
         )}
-        {ctx.chatStore.develop_mode && (
+        {chatStore.develop_mode && (
           <Button
             variant="destructive"
             className="w-full"
@@ -57,7 +57,7 @@ export function EditMessage(props: EditMessageProps) {
               } else {
                 chat.content = "";
               }
-              ctx.setChatStore({ ...ctx.chatStore });
+              setChatStore({ ...chatStore });
             }}
           >
             Switch to{" "}
diff --git a/src/components/editMessageDetail.tsx b/src/components/editMessageDetail.tsx
index 63cf9f4..3ea366d 100644
--- a/src/components/editMessageDetail.tsx
+++ b/src/components/editMessageDetail.tsx
@@ -15,16 +15,14 @@ import {
 
 import { Button } from "./ui/button";
 import { useContext } from "react";
-import { AppContext } from "../pages/App";
+import { AppChatStoreContext, AppContext } from "../pages/App";
 
 interface Props {
   chat: ChatStoreMessage;
   setShowEdit: (se: boolean) => void;
 }
 export function EditMessageDetail({ chat, setShowEdit }: Props) {
-  const ctx = useContext(AppContext);
-
-  const { chatStore, setChatStore } = ctx;
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   if (typeof chat.content !== "object") return <div>error</div>;
   return (
diff --git a/src/components/editMessageString.tsx b/src/components/editMessageString.tsx
index fe3cf07..27a29b5 100644
--- a/src/components/editMessageString.tsx
+++ b/src/components/editMessageString.tsx
@@ -5,16 +5,14 @@ import { Tr } from "@/translate";
 
 import { Textarea } from "@/components/ui/textarea";
 import { useContext } from "react";
-import { AppContext } from "../pages/App";
+import { AppChatStoreContext, AppContext } from "../pages/App";
 
 interface Props {
   chat: ChatStoreMessage;
   setShowEdit: (se: boolean) => void;
 }
 export function EditMessageString({ chat, setShowEdit }: Props) {
-  const ctx = useContext(AppContext);
-
-  const { chatStore, setChatStore } = ctx;
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   if (typeof chat.content !== "string") return <div>error</div>;
   return (
diff --git a/src/components/navbar.tsx b/src/components/navbar.tsx
index 68923c8..d2fd88a 100644
--- a/src/components/navbar.tsx
+++ b/src/components/navbar.tsx
@@ -26,7 +26,7 @@ import {
   ArrowUpDownIcon,
   ScissorsIcon,
 } from "lucide-react";
-import { AppContext } from "@/pages/App";
+import { AppChatStoreContext, AppContext } from "@/pages/App";
 import { models } from "@/types/models";
 import { getTotalCost } from "@/utils/totalCost";
 import { Tr } from "@/translate";
@@ -36,9 +36,7 @@ import Search from "@/components/Search";
 import Settings from "@/components/Settings";
 
 const Navbar: React.FC = () => {
-  const ctx = useContext(AppContext);
-  if (!ctx) return <div>error</div>;
-  const { chatStore, setChatStore } = ctx;
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
 
   return (
     <header className="flex sticky top-0 bg-background h-14 shrink-0 items-center border-b z-50">
diff --git a/src/pages/App.tsx b/src/pages/App.tsx
index 2c484a2..ebed614 100644
--- a/src/pages/App.tsx
+++ b/src/pages/App.tsx
@@ -1,5 +1,5 @@
 import { IDBPDatabase, openDB } from "idb";
-import { createContext, useEffect, useState } from "react";
+import { createContext, useContext, useEffect, useState } from "react";
 import "@/global.css";
 
 import { calculate_token_length } from "@/chatgpt";
@@ -31,8 +31,6 @@ import {
 
 interface AppContextType {
   db: Promise<IDBPDatabase<ChatStore>>;
-  chatStore: ChatStore;
-  setChatStore: (cs: ChatStore) => void;
   selectedChatIndex: number;
   setSelectedChatIndex: (i: number) => void;
   templates: TemplateChatStore[];
@@ -49,7 +47,15 @@ interface AppContextType {
   setTemplateTools: (t: TemplateTools[]) => void;
 }
 
+interface AppChatStoreContextType {
+  chatStore: ChatStore;
+  setChatStore: (cs: ChatStore) => void;
+}
+
 export const AppContext = createContext<AppContextType>(null as any);
+export const AppChatStoreContext = createContext<AppChatStoreContextType>(
+  null as any
+);
 
 import {
   Sidebar,
@@ -123,57 +129,6 @@ export function App() {
     return ret;
   };
 
-  const [chatStore, _setChatStore] = useState(newChatStore({}));
-  const setChatStore = async (chatStore: ChatStore) => {
-    console.log("recalculate postBeginIndex");
-    const max = chatStore.maxTokens - chatStore.tokenMargin;
-    let sum = 0;
-    chatStore.postBeginIndex = chatStore.history.filter(
-      ({ hide }) => !hide
-    ).length;
-    for (const msg of chatStore.history
-      .filter(({ hide }) => !hide)
-      .slice()
-      .reverse()) {
-      if (sum + msg.token > max) break;
-      sum += msg.token;
-      chatStore.postBeginIndex -= 1;
-    }
-    chatStore.postBeginIndex =
-      chatStore.postBeginIndex < 0 ? 0 : chatStore.postBeginIndex;
-
-    // manually estimate token
-    chatStore.totalTokens = calculate_token_length(
-      chatStore.systemMessageContent
-    );
-    for (const msg of chatStore.history
-      .filter(({ hide }) => !hide)
-      .slice(chatStore.postBeginIndex)) {
-      chatStore.totalTokens += msg.token;
-    }
-
-    console.log("saved chat", selectedChatIndex, chatStore);
-    (await db).put(STORAGE_NAME, chatStore, selectedChatIndex);
-
-    // update total tokens
-    chatStore.totalTokens = calculate_token_length(
-      chatStore.systemMessageContent
-    );
-    for (const msg of chatStore.history
-      .filter(({ hide }) => !hide)
-      .slice(chatStore.postBeginIndex)) {
-      chatStore.totalTokens += msg.token;
-    }
-
-    _setChatStore(chatStore);
-  };
-  useEffect(() => {
-    const run = async () => {
-      _setChatStore(await getChatStoreByIndex(selectedChatIndex));
-    };
-    run();
-  }, [selectedChatIndex]);
-
   // all chat store indexes
   const [allChatStoreIndexes, setAllChatStoreIndexes] = useState<IDBValidKey>(
     []
@@ -189,7 +144,8 @@ export function App() {
     });
   };
   const handleNewChatStore = async () => {
-    return handleNewChatStoreWithOldOne(chatStore);
+    let currentChatStore = await getChatStoreByIndex(selectedChatIndex);
+    return handleNewChatStoreWithOldOne(currentChatStore);
   };
 
   const handleDEL = async () => {
@@ -198,7 +154,7 @@ export function App() {
     const newAllChatStoreIndexes = await (await db).getAllKeys(STORAGE_NAME);
 
     if (newAllChatStoreIndexes.length === 0) {
-      handleNewChatStore();
+      await handleNewChatStore();
       return;
     }
 
@@ -333,8 +289,6 @@ export function App() {
     <AppContext.Provider
       value={{
         db,
-        chatStore,
-        setChatStore,
         selectedChatIndex,
         setSelectedChatIndex,
         templates,
@@ -407,19 +361,93 @@ export function App() {
               </AlertDialogFooter>
             </AlertDialogContent>
           </AlertDialog>
-
-          {chatStore.develop_mode && (
-            <Button onClick={handleCLS} variant="destructive">
-              <span>{Tr("CLS")}</span>
-            </Button>
-          )}
         </SidebarFooter>
         <SidebarRail />
       </Sidebar>
       <SidebarInset>
-        <Navbar />
-        <ChatBOX />
+        <AppChatStoreProvider
+          selectedChatIndex={selectedChatIndex}
+          getChatStoreByIndex={getChatStoreByIndex}
+        >
+          <Navbar />
+          <ChatBOX />
+        </AppChatStoreProvider>
       </SidebarInset>
     </AppContext.Provider>
   );
 }
+
+const AppChatStoreProvider = ({
+  children,
+  selectedChatIndex,
+  getChatStoreByIndex,
+}: {
+  children: React.ReactNode;
+  selectedChatIndex: number;
+  getChatStoreByIndex: (index: number) => Promise<ChatStore>;
+}) => {
+  console.log("[Render] AppChatStoreProvider");
+  const ctx = useContext(AppContext);
+
+  const [chatStore, _setChatStore] = useState(newChatStore({}));
+  const setChatStore = async (chatStore: ChatStore) => {
+    console.log("recalculate postBeginIndex");
+    const max = chatStore.maxTokens - chatStore.tokenMargin;
+    let sum = 0;
+    chatStore.postBeginIndex = chatStore.history.filter(
+      ({ hide }) => !hide
+    ).length;
+    for (const msg of chatStore.history
+      .filter(({ hide }) => !hide)
+      .slice()
+      .reverse()) {
+      if (sum + msg.token > max) break;
+      sum += msg.token;
+      chatStore.postBeginIndex -= 1;
+    }
+    chatStore.postBeginIndex =
+      chatStore.postBeginIndex < 0 ? 0 : chatStore.postBeginIndex;
+
+    // manually estimate token
+    chatStore.totalTokens = calculate_token_length(
+      chatStore.systemMessageContent
+    );
+    for (const msg of chatStore.history
+      .filter(({ hide }) => !hide)
+      .slice(chatStore.postBeginIndex)) {
+      chatStore.totalTokens += msg.token;
+    }
+
+    console.log("saved chat", selectedChatIndex, chatStore);
+    (await ctx.db).put(STORAGE_NAME, chatStore, selectedChatIndex);
+
+    // update total tokens
+    chatStore.totalTokens = calculate_token_length(
+      chatStore.systemMessageContent
+    );
+    for (const msg of chatStore.history
+      .filter(({ hide }) => !hide)
+      .slice(chatStore.postBeginIndex)) {
+      chatStore.totalTokens += msg.token;
+    }
+
+    _setChatStore(chatStore);
+  };
+  useEffect(() => {
+    const run = async () => {
+      _setChatStore(await getChatStoreByIndex(selectedChatIndex));
+    };
+    run();
+  }, [selectedChatIndex]);
+
+  return (
+    <AppChatStoreContext.Provider
+      value={{
+        chatStore,
+        setChatStore,
+      }}
+    >
+      {children}
+    </AppChatStoreContext.Provider>
+  );
+};
diff --git a/src/pages/Chatbox.tsx b/src/pages/Chatbox.tsx
index e37e5ab..b6c3544 100644
--- a/src/pages/Chatbox.tsx
+++ b/src/pages/Chatbox.tsx
@@ -39,19 +39,14 @@ import {
 import { Switch } from "@/components/ui/switch";
 import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
 
-import { AppContext } from "./App";
+import { AppChatStoreContext, AppContext } from "./App";
 import APIListMenu from "@/components/ListAPI";
 import { ImageGenDrawer } from "@/components/ImageGenDrawer";
 
 export default function ChatBOX() {
-  const ctx = useContext(AppContext);
-  const {
-    db,
-    chatStore,
-    setChatStore,
-    selectedChatIndex,
-    setSelectedChatIndex,
-  } = ctx;
+  const { db, selectedChatIndex, setSelectedChatIndex } =
+    useContext(AppContext);
+  const { chatStore, setChatStore } = useContext(AppChatStoreContext);
   // prevent error
   const [inputMsg, setInputMsg] = useState("");
   const [images, setImages] = useState<MessageDetail[]>([]);