fix: resolve jsQR dynamic import issue

Remove static type import to prevent module evaluation and use
dynamic import for jsQR to resolve rendering warnings.

Co-authored-by: Simon <85533298+handsomezhuzhu@users.noreply.github.com>

app/page.tsx

@@ -3,7 +3,6 @@
 import type React from "react"
 
 import { useState, useEffect, useRef, useCallback } from "react"
-import type jsQRType from "jsqr"
 import {
   Plus,
   Camera,