fix: remove unused imports

src/App.tsx

···
 import { ThemeProvider } from "./theme-provider";
 import { toast, Toaster } from "sonner";
 import { ScrollArea } from "./components/ui/scroll-area";
-import { BackupAgent } from "./lib/backup";
-import { settingsManager } from "./lib/settings";
 import { check, Update } from "@tauri-apps/plugin-updater";
 import { relaunch } from "@tauri-apps/plugin-process";
 import {
···
   DialogFooter,
   DialogHeader,
   DialogTitle,
-  DialogTrigger,
 } from "@/components/ui/dialog";
 import { Progress } from "./components/ui/progress";
 import { MarkdownRenderer } from "./components/ui/markdown-renderer";

src/components/ui/markdown-renderer.tsx

···
 import React, { Suspense } from "react";
 import Markdown from "react-markdown";
 import remarkGfm from "remark-gfm";
-import type { ThemedToken, TokensResult } from "shiki";
+import type { ThemedToken } from "shiki";
 
 import { cn } from "@/lib/utils";
 import { CopyButton } from "@/components/ui/copy-button";