add initial project files for Flutter app with platform-specific configs and basic routing setup

lib/pages/map/tiles/hive_tile_image.dart

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+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:rra_app/pages/map/tiles/hive_tile_cache.dart';
+
+class HiveTileImage extends StatefulWidget {
+  const HiveTileImage({required this.url, super.key});
+
+  final String url;
+
+  @override
+  State<HiveTileImage> createState() => _HiveTileImageState();
+}
+
+class _HiveTileImageState extends State<HiveTileImage> {
+  Uint8List? _bytes;
+  String? _loadingUrl;
+
+  @override
+  void initState() {
+    super.initState();
+    _load(widget.url);
+  }
+
+  @override
+  void didUpdateWidget(covariant HiveTileImage oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.url != widget.url) {
+      _load(widget.url);
+    }
+  }
+
+  Future<void> _load(String url) async {
+    _loadingUrl = url;
+    final bytes = await HiveTileCache.getOrFetch(url);
+    if (!mounted || _loadingUrl != url) return;
+    if (bytes != null && bytes.isNotEmpty) {
+      setState(() {
+        _bytes = bytes;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final bytes = _bytes;
+    if (bytes == null || bytes.isEmpty) {
+      return const ColoredBox(color: Color(0xFFE0E0E0));
+    }
+    return Image.memory(
+      bytes,
+      fit: BoxFit.cover,
+      gaplessPlayback: true,
+      filterQuality: FilterQuality.low,
+    );
+  }
+}