flutter-pre-caching

# Pre-caching in Flutter and Flutter Web Pre-caching helps avoid jank, loading flashes, font swaps, and delayed first renders. The key rule: > Pre-cache only what the user will likely see in the next 1 to 2 screens. Do not pre-cache the whole app. That can slow startup and waste memory. --- ## 1. Google Fonts ### Runtime Google Fonts preloading Use `GoogleFonts.pendingFonts()` to load the font variants before showing text. ```dart import 'package:flutter/material.dart'; import 'package:google_fonts/google_fonts.dart'; class ExampleSimple extends StatefulWidget { const ExampleSimple({super.key}); @override State<ExampleSimple> createState() => _ExampleSimpleState(); } class _ExampleSimpleState extends State<ExampleSimple> { late final Future<List<void>> googleFontsPending; @override void initState() { super.initState(); googleFontsPending = GoogleFonts.pendingFonts([ GoogleFonts.poppins(), GoogleFonts.montserrat(fontStyle: FontStyle.italic), ]); } @override Widget build(BuildContext context) { final pushButtonTextStyle = GoogleFonts.poppins( textStyle: Theme.of(context).textTheme.headlineMedium, ); final counterTextStyle = GoogleFonts.montserrat( fontStyle: FontStyle.italic, textStyle: Theme.of(context).textTheme.displayLarge, ); return FutureBuilder<List<void>>( future: googleFontsPending, builder: (context, snapshot) { if (snapshot.connectionState != Connectio...