Change log

-   config.ts
    -   line 72 remove type confirmation of x as x always has type 'number'
    -   line 135 remove redundant local variable
-   chat.ts
    -   delete unused import

app/store/chat.ts

@@ -1,6 +1,3 @@
-import { create } from "zustand";
-import { persist } from "zustand/middleware";
-
 import { trimTopic } from "../utils";
 
 import Locale, { getLang } from "../locales";