feat: 移植 B50 成绩图，并把项目名从 purarine 改回 ichino

海报从 Empurple 的 Best50ImageRenderer/ImageBuilder 移植：按原始像素坐标
(1762x1850 画布、300x100 卡片、5 列、行距 120) 叠加在 base.png 上，底图里
已画好的面板/药丸标签/页脚不重复绘制；页面外壳走 Ichino 的 Material 3。

RatingCalculator 的达成率分档改成单张有序表，避免偏移与评级错位；
RA 与评级由 test/rating_calculator_test.dart 的边界用例锁定。

GetUserRatingApi 只需要 userId(Cookie 可选)，所以 Preview API 模式、未登录
游戏服务器时也能出图，只是没有 FC/AP/FS 标记。导出用 RepaintBoundary 抓
全尺寸 PNG：原生走 share_plus(不支持文件分享的平台回退为落盘并提示路径)，
web 走下载。

BEST35 与 BEST15 改为各自独立排版。原先沿用 Empurple 的跨列表全局序号，
BEST35 没打满时 BEST15 会整体上移混进上半区。

path_provider 会经 path_provider_android 2.3.x 拖入 jni 插件，而 jni 把
windows/linux 也声明成 ffiPlugin，桌面构建因此去链接 jvm.lib 并失败，
故用 dependency_overrides 钉住 path_provider_android <2.3.0。

.vscode/launch.json

@@ -5,14 +5,14 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "Purarine",
+            "name": "Ichino",
             "request": "launch",
             "type": "dart",
             "program": "lib/main.dart",
             "deviceId": "windows"
         },
         {
-            "name": "Purarine (profile mode)",
+            "name": "Ichino (profile mode)",
             "request": "launch",
             "type": "dart",
             "program": "lib/main.dart",
@@ -20,7 +20,7 @@
             "flutterMode": "profile"
         },
         {
-            "name": "Purarine (release mode)",
+            "name": "Ichino (release mode)",
             "request": "launch",
             "type": "dart",
             "program": "lib/main.dart",

README.md

@@ -1,4 +1,4 @@
-# Purarine
+# Ichino
 
 A new Flutter project.
 

android/app/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 android {
-    namespace = "dev.naominet.purarine"
+    namespace = "dev.naominet.ichino"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -15,7 +15,7 @@ android {
     }
 
     defaultConfig {
-        applicationId = "dev.naominet.purarine"
+        applicationId = "dev.naominet.ichino"
         minSdk = flutter.minSdkVersion
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode

android/app/src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.INTERNET"/>
     <application
-        android:label="Purarine"
+        android:label="Ichino"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
         android:usesCleartextTraffic="true">

android/app/src/main/kotlin/dev/naominet/ichino/MainActivity.kt

@@ -1,4 +1,4 @@
-package dev.naominet.purarine
+package dev.naominet.ichino
 
 import android.graphics.BitmapFactory
 import com.google.mlkit.vision.barcode.BarcodeScanning
@@ -9,7 +9,7 @@ import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
 
 class MainActivity : FlutterActivity() {
-    private val CHANNEL = "dev.naominet.purarine/qr_scanner"
+    private val CHANNEL = "dev.naominet.ichino/qr_scanner"
 
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)

ios/Runner.xcodeproj/project.pbxproj

@@ -475,7 +475,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
@@ -493,7 +493,7 @@
 				DEVELOPMENT_TEAM = 3ACWHAQMGP;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -512,7 +512,7 @@
 				DEVELOPMENT_TEAM = 3ACWHAQMGP;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
@@ -529,7 +529,7 @@
 				DEVELOPMENT_TEAM = 3ACWHAQMGP;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
@@ -663,7 +663,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -688,7 +688,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;

ios/Runner/Info.plist

@@ -7,7 +7,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Purarine</string>
+	<string>Ichino</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -15,7 +15,7 @@
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
-	<string>purarine</string>
+	<string>ichino</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>

ios/Runner/SceneDelegate.swift

@@ -14,7 +14,7 @@ class SceneDelegate: FlutterSceneDelegate {
     guard let controller = window?.rootViewController as? FlutterViewController else { return }
 
     let channel = FlutterMethodChannel(
-      name: "dev.naominet.purarine/qr_scanner",
+      name: "dev.naominet.ichino/qr_scanner",
       binaryMessenger: controller.binaryMessenger
     )
 

lib/config/strings.dart

@@ -4,12 +4,13 @@ class AppStrings {
   // Tab
   static const tabHome = '主页';
   static const tabTickets = '票据';
+  static const tabBest50 = 'B50';
   static const tabRisk = '风险';
   static const tabSettings = '设置';
   static const tabAbout = '关于';
 
   // Login
-  static const appTitle = 'Purarine';
+  static const appTitle = 'Ichino';
   static const loginSubtitle = '扫描或输入二维码进行登录';
   static const qrCodeToken = 'QR Code 令牌';
   static const qrHint = '粘贴二维码解析内容...';
@@ -231,8 +232,24 @@ class AppStrings {
   static String musicRiskHubCooldownNotice(int remaining) =>
       '登录后需冷却 $ticketCooldownSeconds 秒，剩余 $remaining 秒后可执行高危操作。';
 
+  // Best50 (Best 50 成绩图)
+  static const best50FeatureTitle = 'Best 50';
+  static const best35Label = 'BEST 35';
+  static const best15Label = 'BEST 15';
+  static const best50Empty = '没有 Rating 数据。';
+  static const best50LoadingMusic = '正在加载乐曲数据...';
+  static const best50Export = '导出图片';
+  static const best50Exporting = '导出中...';
+  static const best50NoMusicData = '乐曲数据未就绪，定数与曲名可能缺失。';
+  static String best50RatingSum(int b35, int b15) =>
+      'B35: $b35 + B15: $b15 = ${b35 + b15}';
+  static String best50Exported(String? path) =>
+      path == null ? '图片已导出' : '图片已导出到 $path';
+  static String best50ExportFailed(String error) => '导出失败: $error';
+  static const best50Footer = 'Generated by Ichino. UI designed by chuxuehaocai.';
+
   // About
-  static const aboutTitle = 'Purarine';
+  static const aboutTitle = 'Ichino';
   static const aboutDesc = '基于 QR Code 的 maimai DX 街机网络登录客户端。';
   static const credits = '致谢';
   static const creditBuiltWith = '构建框架';

lib/models/user_rating.dart

@@ -0,0 +1,102 @@
+/// GetUserRatingApi 的 `userRating` 结构，移植自 Empurple 的 `UserRatingData`。
+///
+/// 服务端已按 RA 排好 BEST 35 / BEST 15，客户端不再重排。
+enum MusicLevel {
+  basic,
+  advanced,
+  expert,
+  master,
+  reMaster;
+
+  static MusicLevel fromInt(int level) =>
+      level >= 0 && level < MusicLevel.values.length
+          ? MusicLevel.values[level]
+          : MusicLevel.basic;
+}
+
+class UserRatingItemBean {
+  final int musicId;
+  final int level;
+  final int achievement;
+  final int comboStatus;
+  final int syncStatus;
+  final int romVersion;
+
+  const UserRatingItemBean({
+    required this.musicId,
+    required this.level,
+    required this.achievement,
+    required this.comboStatus,
+    required this.syncStatus,
+    required this.romVersion,
+  });
+
+  /// 达成率百分比数值，接口原值 1001234 => 100.1234。
+  double get achievementPercent => achievement / 10000.0;
+
+  /// 对应 Empurple 的 `formatRatingSimple`。
+  String get achievementText => '${achievementPercent.toStringAsFixed(4)}%';
+
+  /// DX 谱的 musicId 会加 10000 偏移。
+  bool get isDx => musicId > 10000;
+
+  MusicLevel get musicLevel => MusicLevel.fromInt(level);
+
+  factory UserRatingItemBean.fromJson(Map<String, dynamic> json) {
+    int toInt(dynamic v) {
+      if (v == null) return 0;
+      if (v is int) return v;
+      if (v is num) return v.toInt();
+      if (v is String) return int.tryParse(v) ?? 0;
+      return 0;
+    }
+
+    return UserRatingItemBean(
+      musicId: toInt(json['musicId']),
+      level: toInt(json['level']),
+      achievement: toInt(json['achievement']),
+      comboStatus: toInt(json['comboStatus']),
+      syncStatus: toInt(json['syncStatus']),
+      romVersion: toInt(json['romVersion']),
+    );
+  }
+}
+
+class UserRatingBean {
+  final int userId;
+  final List<UserRatingItemBean> ratingList;
+  final List<UserRatingItemBean> newRatingList;
+
+  const UserRatingBean({
+    required this.userId,
+    required this.ratingList,
+    required this.newRatingList,
+  });
+
+  static List<UserRatingItemBean> _parseList(dynamic raw) {
+    if (raw is! List) return const [];
+    return raw
+        .whereType<Map<String, dynamic>>()
+        .map(UserRatingItemBean.fromJson)
+        .toList();
+  }
+
+  factory UserRatingBean.fromJson(Map<String, dynamic> json) {
+    int toInt(dynamic v) {
+      if (v == null) return 0;
+      if (v is int) return v;
+      if (v is num) return v.toInt();
+      if (v is String) return int.tryParse(v) ?? 0;
+      return 0;
+    }
+
+    final userRating =
+        (json['userRating'] as Map<String, dynamic>?) ?? const {};
+
+    return UserRatingBean(
+      userId: toInt(json['userId']),
+      ratingList: _parseList(userRating['ratingList']),
+      newRatingList: _parseList(userRating['newRatingList']),
+    );
+  }
+}

lib/pages/best50_page.dart

@@ -0,0 +1,320 @@
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+
+import '../config/strings.dart';
+import '../config/title_server_config.dart';
+import '../models/user_rating.dart';
+import '../services/music_data_service.dart';
+import '../services/png_export_service.dart';
+import '../services/rating_calculator.dart';
+import '../services/title_api_service.dart';
+import '../widgets/best50_poster.dart';
+
+/// Best 50 成绩图页面：负责取数与导出，海报本身在 `widgets/best50_poster.dart`。
+///
+/// GetUserRatingApi 只需要 userId（Cookie 是可选的，与 Empurple 的
+/// `UserRatingRequest` + `MaimaiApiClient` 一致），所以 Preview API 模式、
+/// 未登录游戏服务器时同样能拉出 B50，只是拿不到 FC/AP、FS 这类详细标记。
+class Best50Page extends StatefulWidget {
+  final int userId;
+  final String? cookies;
+  final String userName;
+  final int iconId;
+  final int playerRating;
+
+  const Best50Page({
+    super.key,
+    required this.userId,
+    this.cookies,
+    required this.userName,
+    required this.iconId,
+    required this.playerRating,
+  });
+
+  @override
+  State<Best50Page> createState() => _Best50PageState();
+}
+
+class _Best50PageState extends State<Best50Page> {
+  final GlobalKey _posterKey = GlobalKey();
+
+  UserRatingBean? _rating;
+  String? _error;
+  bool _loading = true;
+  bool _exporting = false;
+  bool _musicReady = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _bootstrap();
+  }
+
+  @override
+  void didUpdateWidget(Best50Page oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    // 本页在 IndexedStack 里会先于 preview/登录请求被构建，cookies 到位后补一次加载。
+    if (oldWidget.cookies != widget.cookies &&
+        (_rating == null || _error != null)) {
+      _bootstrap();
+    }
+  }
+
+  Future<void> _bootstrap() async {
+    if (!TitleServerConfigHolder().isConfigured) {
+      _fail(AppStrings.ticketNotConfigured);
+      return;
+    }
+
+    setState(() {
+      _loading = true;
+      _error = null;
+    });
+
+    try {
+      final service = TitleApiService(
+        TitleServerConfigHolder().config!,
+        cookies: widget.cookies,
+      );
+      final rating = await service.getUserRatingTyped(widget.userId);
+      if (!mounted) return;
+      setState(() {
+        _rating = rating;
+        _loading = false;
+      });
+
+      // 曲名/定数缺失时仍能出图（RA 会是 0），所以不当作致命错误。
+      await MusicDataService.instance.load();
+      if (!mounted) return;
+      setState(() => _musicReady = true);
+    } on TitleApiException catch (e) {
+      _fail(e.message);
+    } catch (e) {
+      _fail('$e');
+    }
+  }
+
+  void _fail(String message) {
+    setState(() {
+      _loading = false;
+      _rating = null;
+      _error = message;
+    });
+  }
+
+  List<Best50CardData> _resolve(List<UserRatingItemBean> items) {
+    final music = MusicDataService.instance;
+    return items.map((item) {
+      final result = RatingCalculator.compute(
+        music.getDs(item.musicId, item.level),
+        item.achievementPercent,
+      );
+      return Best50CardData(
+        musicId: item.musicId,
+        level: item.musicLevel,
+        title: music.getTitle(item.musicId),
+        achievementText: item.achievementText,
+        comboStatus: item.comboStatus,
+        syncStatus: item.syncStatus,
+        ra: result.ra,
+        rate: result.rate,
+      );
+    }).toList();
+  }
+
+  Future<void> _export() async {
+    setState(() => _exporting = true);
+    try {
+      final boundary =
+          _posterKey.currentContext?.findRenderObject()
+              as RenderRepaintBoundary?;
+      if (boundary == null) throw Exception('海报尚未完成布局');
+
+      final image = await boundary.toImage(pixelRatio: Best50Poster.exportPixelRatio);
+      final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
+      image.dispose();
+      if (byteData == null) throw Exception('PNG 编码失败');
+
+      final path = await exportPng(
+        byteData.buffer.asUint8List(),
+        'best50_${widget.userId}.png',
+      );
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(AppStrings.best50Exported(path))),
+      );
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(AppStrings.best50ExportFailed('$e'))),
+      );
+    } finally {
+      if (mounted) setState(() => _exporting = false);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    if (_loading) {
+      return const Center(child: CircularProgressIndicator());
+    }
+
+    final rating = _rating;
+    if (rating == null) {
+      return _StateView(
+        message: _error ?? AppStrings.loadFailed,
+        onRetry: _bootstrap,
+      );
+    }
+
+    if (rating.ratingList.isEmpty && rating.newRatingList.isEmpty) {
+      return _StateView(
+        message: AppStrings.best50Empty,
+        onRetry: _bootstrap,
+        icon: Icons.bar_chart_outlined,
+      );
+    }
+
+    final best35 = _resolve(
+      rating.ratingList.take(Best50Poster.maxBest35).toList(),
+    );
+    final best15 = _resolve(
+      rating.newRatingList.take(Best50Poster.maxBest15).toList(),
+    );
+
+    return Scaffold(
+      body: Column(
+        children: [
+          if (!_musicReady)
+            _NoticeBanner(theme: theme, text: AppStrings.best50NoMusicData),
+          Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+            child: SizedBox(
+              width: double.infinity,
+              child: FilledButton.icon(
+                onPressed: _exporting ? null : _export,
+                icon: _exporting
+                    ? const SizedBox(
+                        width: 20,
+                        height: 20,
+                        child: CircularProgressIndicator(strokeWidth: 2),
+                      )
+                    : const Icon(Icons.download, size: 20),
+                label: Text(
+                  _exporting
+                      ? AppStrings.best50Exporting
+                      : AppStrings.best50Export,
+                ),
+                style: FilledButton.styleFrom(
+                  padding: const EdgeInsets.symmetric(vertical: 14),
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(12),
+                  ),
+                ),
+              ),
+            ),
+          ),
+          Expanded(
+            child: InteractiveViewer(
+              maxScale: 6,
+              boundaryMargin: const EdgeInsets.all(24),
+              // FittedBox 会按视口把固定尺寸的海报缩出来；它给子节点无限约束，
+              // 所以海报仍保持 1762x1850，RepaintBoundary 录到的也是原始尺寸
+              // （祖先变换不会被烘进边界里），导出不会糊。
+              child: FittedBox(
+                fit: BoxFit.contain,
+                alignment: Alignment.topCenter,
+                child: RepaintBoundary(
+                  key: _posterKey,
+                  child: Best50Poster(
+                    userName: widget.userName,
+                    iconId: widget.iconId,
+                    playerRating: widget.playerRating,
+                    best35: best35,
+                    best15: best15,
+                  ),
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+// =============================================================================
+// 页面级辅助组件（非海报部分，跟随 Ichino 现有卡片/横幅风格）
+// =============================================================================
+
+class _NoticeBanner extends StatelessWidget {
+  final ThemeData theme;
+  final String text;
+
+  const _NoticeBanner({required this.theme, required this.text});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      width: double.infinity,
+      margin: const EdgeInsets.fromLTRB(16, 12, 16, 0),
+      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
+      decoration: BoxDecoration(
+        color: theme.colorScheme.tertiaryContainer.withValues(alpha: 0.4),
+        borderRadius: BorderRadius.circular(10),
+      ),
+      child: Text(
+        text,
+        style: theme.textTheme.bodySmall?.copyWith(
+          color: theme.colorScheme.onTertiaryContainer,
+        ),
+      ),
+    );
+  }
+}
+
+class _StateView extends StatelessWidget {
+  final String message;
+  final VoidCallback onRetry;
+  final IconData icon;
+
+  const _StateView({
+    required this.message,
+    required this.onRetry,
+    this.icon = Icons.error_outline,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(32),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: 48, color: theme.colorScheme.error),
+            const SizedBox(height: 12),
+            Text(
+              message,
+              style: theme.textTheme.bodySmall?.copyWith(
+                color: theme.colorScheme.onSurfaceVariant,
+              ),
+              textAlign: TextAlign.center,
+            ),
+            const SizedBox(height: 20),
+            FilledButton.icon(
+              onPressed: onRetry,
+              icon: const Icon(Icons.refresh, size: 20),
+              label: const Text(AppStrings.retry),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/pages/home_page.dart

@@ -8,6 +8,7 @@ import '../models/user_data.dart';
 import '../models/user_preview.dart';
 import '../services/title_api_service.dart';
 import 'about_page.dart';
+import 'best50_page.dart';
 import 'high_risk_feature_page.dart';
 import 'settings_page.dart';
 import 'ticket_page.dart';
@@ -42,6 +43,7 @@ class _HomePageState extends State<HomePage> {
   static const _tabTitles = [
     AppStrings.tabHome,
     AppStrings.tabTickets,
+    AppStrings.tabBest50,
     AppStrings.tabRisk,
     AppStrings.tabSettings,
     AppStrings.tabAbout,
@@ -218,6 +220,13 @@ class _HomePageState extends State<HomePage> {
                   playerRating: _userData?.playerRating ?? _preview?.playerRating ?? 0,
                   onLogoutRequested: _session.gameLogin != null ? _logoutSession : null,
                 ),
+                Best50Page(
+                  userId: widget.userId,
+                  cookies: _session.cookies,
+                  userName: _userData?.userName ?? _preview?.userName ?? '',
+                  iconId: _userData?.iconId ?? _preview?.iconId ?? 0,
+                  playerRating: _userData?.playerRating ?? _preview?.playerRating ?? 0,
+                ),
                 HighRiskFeaturePage(
                   userId: widget.userId,
                   cookies: _session.cookies,
@@ -237,6 +246,7 @@ class _HomePageState extends State<HomePage> {
               destinations: const [
                 NavigationDestination(icon: Icon(Icons.home_outlined), selectedIcon: Icon(Icons.home), label: AppStrings.tabHome),
                 NavigationDestination(icon: Icon(Icons.confirmation_number_outlined), selectedIcon: Icon(Icons.confirmation_number), label: AppStrings.tabTickets),
+                NavigationDestination(icon: Icon(Icons.bar_chart_outlined), selectedIcon: Icon(Icons.bar_chart), label: AppStrings.tabBest50),
                 NavigationDestination(icon: Icon(Icons.warning_outlined), selectedIcon: Icon(Icons.inventory_2), label: AppStrings.tabRisk),
                 NavigationDestination(icon: Icon(Icons.settings_outlined), selectedIcon: Icon(Icons.settings), label: AppStrings.tabSettings),
                 NavigationDestination(icon: Icon(Icons.info_outlined), selectedIcon: Icon(Icons.info), label: AppStrings.tabAbout),
@@ -272,7 +282,7 @@ class _HomePageState extends State<HomePage> {
               ),
               const SizedBox(height: 24),
               FilledButton.icon(
-                onPressed: () => setState(() => _currentTab = 3),
+                onPressed: () => setState(() => _currentTab = 4),
                 icon: const Icon(Icons.settings, size: 20),
                 label: const Text(AppStrings.openSettings),
               ),

lib/services/music_data_cache.dart

@@ -0,0 +1,8 @@
+import 'music_data_cache_native.dart'
+    if (dart.library.html) 'music_data_cache_web.dart' as impl;
+
+/// 乐曲元数据的磁盘缓存，Web 平台为空实现。读失败返回 null，写失败静默忽略。
+Future<String?> readTextCache(String fileName) => impl.readTextCache(fileName);
+
+Future<void> writeTextCache(String fileName, String content) =>
+    impl.writeTextCache(fileName, content);

lib/services/music_data_cache_native.dart

@@ -0,0 +1,29 @@
+import 'dart:io';
+
+/// 乐曲元数据是可重新下载的参考数据，放系统临时目录即可，
+/// 不引入 path_provider（它经 path_provider_android 拖进 jni 插件，
+/// jni 会在 Windows 上强行链接 jvm.lib）。
+Future<String?> readTextCache(String fileName) async {
+  try {
+    final file = await _file(fileName);
+    if (!await file.exists()) return null;
+    final content = await file.readAsString();
+    return content.isEmpty ? null : content;
+  } catch (_) {
+    return null;
+  }
+}
+
+Future<void> writeTextCache(String fileName, String content) async {
+  try {
+    await (await _file(fileName)).writeAsString(content);
+  } catch (_) {
+    // 缓存是尽力而为，失败只影响下次启动的加载速度。
+  }
+}
+
+Future<File> _file(String fileName) async {
+  final dir = Directory('${Directory.systemTemp.path}/ichino_cache');
+  await dir.create(recursive: true);
+  return File('${dir.path}/$fileName');
+}

lib/services/music_data_cache_web.dart

@@ -0,0 +1,3 @@
+Future<String?> readTextCache(String fileName) async => null;
+
+Future<void> writeTextCache(String fileName, String content) async {}

lib/services/music_data_service.dart

@@ -0,0 +1,93 @@
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+
+import 'music_data_cache.dart';
+
+class MusicInfo {
+  final String title;
+  final Map<int, double> dsByLevel;
+
+  const MusicInfo({required this.title, required this.dsByLevel});
+}
+
+/// 乐曲元数据来源，移植自 Empurple 的 `MusicDataProvider`。
+///
+/// 游戏接口的 ratingList 只有 musicId，曲名与各难度定数需要另行获取。
+class MusicDataService {
+  static const String _musicDataUrl =
+      'https://www.diving-fish.com/api/maimaidxprober/music_data';
+  static const String _cacheFileName = 'music_data.json';
+
+  MusicDataService._();
+
+  static final MusicDataService instance = MusicDataService._();
+
+  final Map<int, MusicInfo> _byId = {};
+  Future<void>? _inFlight;
+
+  String getTitle(int musicId) => _byId[musicId]?.title ?? 'Unknown';
+
+  /// 缺失定数时返回 0，RA 也随之为 0，与 Empurple 行为一致。
+  double getDs(int musicId, int level) =>
+      _byId[musicId]?.dsByLevel[level] ?? 0.0;
+
+  /// 并发调用共享同一次下载。
+  Future<void> load() {
+    if (_byId.isNotEmpty) return Future.value();
+    return _inFlight ??= _load().whenComplete(() => _inFlight = null);
+  }
+
+  Future<void> _load() async {
+    final cached = await readTextCache(_cacheFileName);
+    final content = cached ?? await _download();
+    _parse(content);
+    if (cached == null) {
+      await writeTextCache(_cacheFileName, content);
+    }
+  }
+
+  Future<String> _download() async {
+    final response = await http
+        .get(Uri.parse(_musicDataUrl), headers: const {'User-Agent': 'Ichino/1.0'})
+        .timeout(const Duration(seconds: 20));
+    if (response.statusCode != 200) {
+      throw Exception('music_data HTTP ${response.statusCode}');
+    }
+    return response.body;
+  }
+
+  void _parse(String content) {
+    final decoded = jsonDecode(content);
+    if (decoded is! List) return;
+    _byId.clear();
+    for (final item in decoded.whereType<Map<String, dynamic>>()) {
+      final id = _toInt(item['id']);
+      if (id == 0) continue;
+      final ds = item['ds'];
+      _byId[id] = MusicInfo(
+        title: item['title']?.toString() ?? 'Unknown',
+        dsByLevel: ds is List
+            ? {
+                for (var level = 0; level < ds.length; level++)
+                  level: _toDouble(ds[level]),
+              }
+            : const {},
+      );
+    }
+  }
+
+  static int _toInt(dynamic v) {
+    if (v is int) return v;
+    if (v is num) return v.toInt();
+    if (v is String) return int.tryParse(v) ?? 0;
+    return 0;
+  }
+
+  static double _toDouble(dynamic v) {
+    if (v is double) return v;
+    if (v is int) return v.toDouble();
+    if (v is String) return double.tryParse(v) ?? 0.0;
+    return 0.0;
+  }
+}

lib/services/png_export_service.dart

@@ -0,0 +1,10 @@
+import 'dart:typed_data';
+
+import 'png_export_service_native.dart'
+    if (dart.library.html) 'png_export_service_web.dart' as impl;
+
+/// 导出一张 PNG：原生平台落临时盘并拉起系统分享，Web 走下载或 Web Share API。
+///
+/// 返回原生平台上的落盘路径（用于分享能力缺失时提示用户），Web 返回 null。
+Future<String?> exportPng(Uint8List bytes, String fileName) =>
+    impl.exportPng(bytes, fileName);

lib/services/png_export_service_native.dart

@@ -0,0 +1,22 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:share_plus/share_plus.dart';
+
+Future<String?> exportPng(Uint8List bytes, String fileName) async {
+  final file = File('${Directory.systemTemp.path}/$fileName');
+  await file.writeAsBytes(bytes);
+
+  try {
+    await SharePlus.instance.share(
+      ShareParams(
+        files: [XFile.fromData(bytes, name: fileName, mimeType: 'image/png')],
+        fileNameOverrides: [fileName],
+      ),
+    );
+  } on UnimplementedError {
+    // Linux 与 Windows 10 RS5 之前不支持分享文件，文件已落盘，返回路径即可。
+  }
+
+  return file.path;
+}

lib/services/png_export_service_web.dart

@@ -0,0 +1,15 @@
+import 'dart:typed_data';
+
+import 'package:share_plus/share_plus.dart';
+
+Future<String?> exportPng(Uint8List bytes, String fileName) async {
+  await SharePlus.instance.share(
+    ShareParams(
+      files: [
+        XFile.fromData(bytes, name: fileName, mimeType: 'image/png'),
+      ],
+      fileNameOverrides: [fileName],
+    ),
+  );
+  return null;
+}

lib/services/qr_service_native.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/services.dart';
 
-const _channel = MethodChannel('dev.naominet.purarine/qr_scanner');
+const _channel = MethodChannel('dev.naominet.ichino/qr_scanner');
 
 Future<String?> decodeQRFromBytes(Uint8List bytes) async {
   try {

lib/services/rating_calculator.dart

@@ -0,0 +1,65 @@
+/// RA / 评级计算，移植自 Empurple 的 `RatingCalculator`。
+///
+/// `achievement` 传入百分比数值（接口原值 1001234 => 100.1234），`ds` 为谱面定数。
+class RaResult {
+  final int ra;
+  final String rate;
+
+  const RaResult(this.ra, this.rate);
+}
+
+/// 达成率区间上界 / RA 系数 / 评级，顺序与 Empurple 的 when 分支一致。
+const List<(int, int, String)> _bands = [
+  (100000, 0, 'D'),
+  (200000, 16, 'D'),
+  (300000, 32, 'D'),
+  (400000, 48, 'D'),
+  (500000, 64, 'D'),
+  (600000, 80, 'C'),
+  (700000, 96, 'B'),
+  (750000, 112, 'BB'),
+  (799999, 120, 'BBB'),
+  (800000, 128, 'BBB'),
+  (900000, 136, 'A'),
+  (940000, 152, 'AA'),
+  (969999, 168, 'AAA'),
+  (970000, 176, 'AAA'),
+  (980000, 200, 'S'),
+  (989999, 203, 'Sp'),
+  (990000, 206, 'Sp'),
+  (995000, 208, 'SS'),
+  (999999, 211, 'SSp'),
+  (1000000, 214, 'SSp'),
+  (1004999, 216, 'SSS'),
+  (1005000, 222, 'SSS'),
+];
+
+const int _maxAchievement = 1005000;
+const int _ssspOffset = 224;
+
+class RatingCalculator {
+  RatingCalculator._();
+
+  static int computeRa(double ds, double achievement) =>
+      compute(ds, achievement).ra;
+
+  static String computeRaRate(double ds, double achievement) =>
+      compute(ds, achievement).rate;
+
+  static RaResult compute(double ds, double achievement) {
+    final achievementRaw =
+        (achievement * 10000.0).round().clamp(0, _maxAchievement);
+    var offset = _ssspOffset;
+    var rate = 'SSSp';
+    for (final (upperBound, bandOffset, bandRate) in _bands) {
+      if (achievementRaw < upperBound) {
+        offset = bandOffset;
+        rate = bandRate;
+        break;
+      }
+    }
+    final scoreRate = (ds * 10.0).round();
+    final ra = scoreRate * achievementRaw * offset ~/ 100000000;
+    return RaResult(ra, rate);
+  }
+}

lib/services/title_api_service.dart

@@ -10,6 +10,7 @@ import 'package:pointycastle/export.dart';
 import '../config/title_server_config.dart';
 import '../models/user_data.dart';
 import '../models/user_preview.dart';
+import '../models/user_rating.dart';
 
 class TitleApiException implements Exception {
   final String message;
@@ -354,6 +355,11 @@ class TitleApiService {
     return _callApi('GetUserRatingApi', {'userId': userId}, userId);
   }
 
+  Future<UserRatingBean> getUserRatingTyped(int userId) async {
+    final json = await getUserRating(userId);
+    return UserRatingBean.fromJson(json);
+  }
+
   Future<Map<String, dynamic>> getUserCharge(int userId) async {
     return _callApi('GetUserChargeApi', {'userId': userId}, userId);
   }

lib/widgets/best50_poster.dart

@@ -0,0 +1,350 @@
+import 'package:flutter/material.dart';
+
+import '../config/strings.dart';
+import '../models/user_rating.dart';
+
+/// 海报上一张卡片所需的数据，由调用方解析好（曲名、定数、RA）。
+class Best50CardData {
+  final int musicId;
+  final MusicLevel level;
+  final String title;
+  final String achievementText;
+  final int comboStatus;
+  final int syncStatus;
+  final int ra;
+  final String rate;
+
+  const Best50CardData({
+    required this.musicId,
+    required this.level,
+    required this.title,
+    required this.achievementText,
+    required this.comboStatus,
+    required this.syncStatus,
+    required this.ra,
+    required this.rate,
+  });
+
+  /// DX 谱的 musicId 带 10000 偏移。
+  bool get isDx => musicId > 10000;
+}
+
+/// Best 50 成绩海报，按 Empurple `Best50ImageRenderer` + `ImageBuilder` 的原始
+/// 像素坐标复现：底图 `assets/b50/base.png` 为 1762x1850，卡片 300x100、
+/// 每行 5 张、Best35 占 0..6 行、Best15 从第 7 行起跳到 1250 那条分隔带下方。
+///
+/// 顶部面板、舞萌DX logo、Best 35 / Best 15 药丸标签与页脚线都已经画在底图里，
+/// 这里只叠加头像、昵称、Rating 行、50 张卡和页脚文字。
+class Best50Poster extends StatelessWidget {
+  static const double canvasWidth = 1762;
+  static const double canvasHeight = 1850;
+  static const double exportPixelRatio = 2;
+
+  static const int maxBest35 = 35;
+  static const int maxBest15 = 15;
+
+  // 卡片栅格（与 Empurple 一致）
+  static const int columnsPerRow = 5;
+  static const double cardWidth = 300;
+  static const double cardHeight = 100;
+  static const double columnPitch = 320;
+  static const double rowPitch = 120;
+  static const double gridLeft = 65;
+  static const double gridTopFirstBlock = 350;
+  static const double gridTopSecondBlock = 1250;
+
+  static const Color inkColor = Color(0xFF3D3D3D);
+  static const Color cardColor = Color(0xFFEDEAFF);
+
+  final String userName;
+  final int iconId;
+  final int playerRating;
+  final List<Best50CardData> best35;
+  final List<Best50CardData> best15;
+
+  const Best50Poster({
+    super.key,
+    required this.userName,
+    required this.iconId,
+    required this.playerRating,
+    required this.best35,
+    required this.best15,
+  });
+
+  /// 两个区块各自独立排版：BEST35 固定从 [gridTopFirstBlock] 起、BEST15 固定从
+  /// [gridTopSecondBlock] 起。不能按「35+15 拼接后的全局序号」算行，否则 BEST35
+  /// 没打满时 BEST15 会整体上移、混进上半区。
+  static double cardLeft(int indexInBlock) =>
+      gridLeft + columnPitch * (indexInBlock % columnsPerRow);
+
+  static double cardTopBest35(int indexInBlock) =>
+      gridTopFirstBlock + rowPitch * (indexInBlock ~/ columnsPerRow);
+
+  static double cardTopBest15(int indexInBlock) =>
+      gridTopSecondBlock + rowPitch * (indexInBlock ~/ columnsPerRow);
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final cards35 = best35.take(maxBest35).toList();
+    final cards15 = best15.take(maxBest15).toList();
+    final ra35 = cards35.fold(0, (sum, card) => sum + card.ra);
+    final ra15 = cards15.fold(0, (sum, card) => sum + card.ra);
+
+    return SizedBox(
+      width: canvasWidth,
+      height: canvasHeight,
+      child: Stack(
+        clipBehavior: Clip.hardEdge,
+        children: [
+          Positioned.fill(
+            child: Image.asset(
+              'assets/b50/base.png',
+              fit: BoxFit.fill,
+              filterQuality: FilterQuality.medium,
+            ),
+          ),
+          if (iconId > 0)
+            Positioned(
+              left: 115,
+              top: 108,
+              child: ClipRRect(
+                borderRadius: BorderRadius.circular(24),
+                child: Image.network(
+                  'https://assets2.lxns.net/maimai/icon/$iconId.png',
+                  width: 112,
+                  height: 112,
+                  fit: BoxFit.cover,
+                  errorBuilder: (_, _, _) => const SizedBox.shrink(),
+                ),
+              ),
+            ),
+          Positioned(
+            left: 260,
+            top: 118,
+            child: Text(
+              userName.isEmpty ? AppStrings.unknownUser : userName,
+              style: TextStyle(
+                fontSize: 48,
+                fontWeight: FontWeight.bold,
+                height: 1.15,
+                color: inkColor,
+                fontFamily: theme.textTheme.bodyLarge?.fontFamily,
+              ),
+            ),
+          ),
+          Positioned(
+            left: 260,
+            top: 178,
+            child: Text(
+              AppStrings.best50RatingSum(ra35, ra15),
+              style: const TextStyle(
+                fontSize: 24,
+                height: 1.15,
+                color: inkColor,
+              ),
+            ),
+          ),
+          Positioned(
+            left: 260,
+            top: 204,
+            child: Text(
+              AppStrings.rating(playerRating),
+              style: const TextStyle(
+                fontSize: 24,
+                height: 1.15,
+                color: inkColor,
+              ),
+            ),
+          ),
+          for (var i = 0; i < cards35.length; i++)
+            Positioned(
+              left: cardLeft(i),
+              top: cardTopBest35(i),
+              child: _RatingCard(data: cards35[i]),
+            ),
+          for (var i = 0; i < cards15.length; i++)
+            Positioned(
+              left: cardLeft(i),
+              top: cardTopBest15(i),
+              child: _RatingCard(data: cards15[i]),
+            ),
+          Positioned(
+            left: 70,
+            top: 1718,
+            child: Text(
+              AppStrings.best50Footer,
+              style: const TextStyle(
+                fontSize: 24,
+                height: 1.15,
+                color: inkColor,
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _RatingCard extends StatelessWidget {
+  final Best50CardData data;
+
+  const _RatingCard({required this.data});
+
+  static const Map<int, String> comboAssets = {
+    1: 'FC',
+    2: 'FCp',
+    3: 'AP',
+    4: 'APp',
+  };
+  static const Map<int, String> syncAssets = {
+    1: 'FS',
+    2: 'FSp',
+    3: 'FSD',
+    4: 'FSDp',
+  };
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: Best50Poster.cardWidth,
+      height: Best50Poster.cardHeight,
+      child: Stack(
+        clipBehavior: Clip.hardEdge,
+        children: [
+          Positioned.fill(
+            child: Container(
+              decoration: BoxDecoration(
+                color: Best50Poster.cardColor,
+                borderRadius: BorderRadius.circular(30),
+              ),
+            ),
+          ),
+          Positioned(
+            left: 10,
+            top: 10,
+            child: ClipRRect(
+              borderRadius: BorderRadius.circular(20),
+              child: Image.network(
+                'https://assets2.lxns.net/maimai/jacket/'
+                '${data.isDx ? data.musicId - 10000 : data.musicId}.png',
+                width: 80,
+                height: 80,
+                fit: BoxFit.cover,
+                errorBuilder: (_, _, _) => Container(
+                  width: 80,
+                  height: 80,
+                  color: Colors.black12,
+                ),
+              ),
+            ),
+          ),
+          Positioned(
+            left: 100,
+            top: 20,
+            width: data.isDx ? 124 : 188,
+            child: Text(
+              data.title,
+              maxLines: 1,
+              overflow: TextOverflow.ellipsis,
+              style: const TextStyle(
+                fontSize: 16,
+                height: 1.15,
+                color: Best50Poster.inkColor,
+              ),
+            ),
+          ),
+          Positioned(
+            left: 100,
+            top: 40,
+            child: Text(
+              data.achievementText,
+              style: const TextStyle(
+                fontSize: 26,
+                height: 1.15,
+                fontWeight: FontWeight.bold,
+                color: Best50Poster.inkColor,
+              ),
+            ),
+          ),
+          if (data.isDx)
+            Positioned(
+              left: 230,
+              top: 20,
+              child: Image.asset(
+                'assets/b50/DX.png',
+                width: 60,
+                height: 21,
+                fit: BoxFit.contain,
+              ),
+            ),
+          Positioned(
+            left: 95,
+            top: 67,
+            child: Image.asset(
+              'assets/b50/UI_TTR_Rank_${data.rate}.png',
+              width: 55,
+              height: 28,
+              fit: BoxFit.contain,
+            ),
+          ),
+          if (comboAssets[data.comboStatus] case final asset?)
+            Positioned(
+              left: 148,
+              top: 66,
+              child: Image.asset(
+                'assets/b50/UI_CHR_PlayBonus_$asset.png',
+                width: 32,
+                height: 32,
+                fit: BoxFit.contain,
+              ),
+            ),
+          if (syncAssets[data.syncStatus] case final asset?)
+            Positioned(
+              left: 178,
+              top: 66,
+              child: Image.asset(
+                'assets/b50/UI_CHR_PlayBonus_$asset.png',
+                width: 32,
+                height: 32,
+                fit: BoxFit.contain,
+              ),
+            ),
+          Positioned(
+            left: 225,
+            top: 70,
+            child: Container(
+              width: 68,
+              height: 26,
+              alignment: Alignment.center,
+              decoration: BoxDecoration(
+                color: _LevelPill.background[data.level],
+                borderRadius: BorderRadius.circular(13),
+              ),
+              child: Text(
+                'RA ${data.ra}',
+                style: const TextStyle(
+                  fontSize: 12,
+                  height: 1.0,
+                  color: Best50Poster.inkColor,
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+/// 难度色是游戏内语义色，与 Empurple 一致，不映射到 Material 色板。
+class _LevelPill {
+  static const Map<MusicLevel, Color> background = {
+    MusicLevel.basic: Color(0xFF628C7B),
+    MusicLevel.advanced: Color(0xFFB58300),
+    MusicLevel.expert: Color(0xFFD37A7A),
+    MusicLevel.master: Color(0xFF6750A4),
+    MusicLevel.reMaster: Color(0xFFD0C8FF),
+  };
+}

linux/CMakeLists.txt

@@ -4,10 +4,10 @@ project(runner LANGUAGES CXX)
 
 # The name of the executable created for the application. Change this to change
 # the on-disk name of your application.
-set(BINARY_NAME "purarine")
+set(BINARY_NAME "ichino")
 # The unique GTK application identifier for this application. See:
 # https://wiki.gnome.org/HowDoI/ChooseApplicationID
-set(APPLICATION_ID "dev.naominet.purarine")
+set(APPLICATION_ID "dev.naominet.ichino")
 
 # Explicitly opt in to modern CMake behaviors to avoid warnings with recent
 # versions of CMake.

linux/flutter/generated_plugin_registrant.cc

@@ -7,9 +7,13 @@
 #include "generated_plugin_registrant.h"
 
 #include <file_selector_linux/file_selector_plugin.h>
+#include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
   file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
+  g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
+  url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);
 }

linux/flutter/generated_plugins.cmake

@@ -4,6 +4,7 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_linux
+  url_launcher_linux
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

linux/runner/my_application.cc

@@ -45,11 +45,11 @@ static void my_application_activate(GApplication* application) {
   if (use_header_bar) {
     GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
     gtk_widget_show(GTK_WIDGET(header_bar));
-    gtk_header_bar_set_title(header_bar, "Purarine");
+    gtk_header_bar_set_title(header_bar, "Ichino");
     gtk_header_bar_set_show_close_button(header_bar, TRUE);
     gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
   } else {
-    gtk_window_set_title(window, "Purarine");
+    gtk_window_set_title(window, "Ichino");
   }
 
   gtk_window_set_default_size(window, 1280, 720);

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -6,9 +6,11 @@ import FlutterMacOS
 import Foundation
 
 import file_selector_macos
+import share_plus
 import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))
+  SharePlusMacosPlugin.register(with: registry.registrar(forPlugin: "SharePlusMacosPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

macos/Runner.xcodeproj/project.pbxproj

@@ -65,7 +65,7 @@
 		331C80D7294CF71000263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		333000ED22D3DE5D00554162 /* Warnings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Warnings.xcconfig; sourceTree = "<group>"; };
 		335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GeneratedPluginRegistrant.swift; sourceTree = "<group>"; };
-		33CC10ED2044A3C60003C045 /* Purarine.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Purarine.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		33CC10ED2044A3C60003C045 /* Ichino.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Ichino.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		33CC10F02044A3C60003C045 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		33CC10F22044A3C60003C045 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Assets.xcassets; path = Runner/Assets.xcassets; sourceTree = "<group>"; };
 		33CC10F52044A3C60003C045 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/MainMenu.xib; sourceTree = "<group>"; };
@@ -134,7 +134,7 @@
 		33CC10EE2044A3C60003C045 /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				33CC10ED2044A3C60003C045 /* Purarine.app */,
+				33CC10ED2044A3C60003C045 /* Ichino.app */,
 				331C80D5294CF71000263BE5 /* RunnerTests.xctest */,
 			);
 			name = Products;
@@ -224,7 +224,7 @@
 				78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */,
 			);
 			productName = Runner;
-			productReference = 33CC10ED2044A3C60003C045 /* Purarine.app */;
+			productReference = 33CC10ED2044A3C60003C045 /* Ichino.app */;
 			productType = "com.apple.product-type.application";
 		};
 /* End PBXNativeTarget section */
@@ -395,10 +395,10 @@
 				CURRENT_PROJECT_VERSION = 1;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Purarine.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Purarine";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Ichino.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Ichino";
 			};
 			name = Debug;
 		};
@@ -409,10 +409,10 @@
 				CURRENT_PROJECT_VERSION = 1;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Purarine.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Purarine";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Ichino.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Ichino";
 			};
 			name = Release;
 		};
@@ -423,10 +423,10 @@
 				CURRENT_PROJECT_VERSION = 1;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine.RunnerTests;
+				PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino.RunnerTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Purarine.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Purarine";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Ichino.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Ichino";
 			};
 			name = Profile;
 		};

macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -15,7 +15,7 @@
                   <BuildableReference
                      BuildableIdentifier = "primary"
                      BlueprintIdentifier = "33CC10EC2044A3C60003C045"
-                     BuildableName = "Purarine.app"
+                     BuildableName = "Ichino.app"
                      BlueprintName = "Runner"
                      ReferencedContainer = "container:Runner.xcodeproj">
                   </BuildableReference>
@@ -33,7 +33,7 @@
             <BuildableReference
                BuildableIdentifier = "primary"
                BlueprintIdentifier = "33CC10EC2044A3C60003C045"
-               BuildableName = "Purarine.app"
+               BuildableName = "Ichino.app"
                BlueprintName = "Runner"
                ReferencedContainer = "container:Runner.xcodeproj">
             </BuildableReference>
@@ -49,7 +49,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "33CC10EC2044A3C60003C045"
-            BuildableName = "Purarine.app"
+            BuildableName = "Ichino.app"
             BlueprintName = "Runner"
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>
@@ -84,7 +84,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "33CC10EC2044A3C60003C045"
-            BuildableName = "Purarine.app"
+            BuildableName = "Ichino.app"
             BlueprintName = "Runner"
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>
@@ -101,7 +101,7 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "33CC10EC2044A3C60003C045"
-            BuildableName = "Purarine.app"
+            BuildableName = "Ichino.app"
             BlueprintName = "Runner"
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>

macos/Runner/Configs/AppInfo.xcconfig

@@ -5,10 +5,10 @@
 // 'flutter create' template.
 
 // The application's name. By default this is also the title of the Flutter window.
-PRODUCT_NAME = Purarine
+PRODUCT_NAME = Ichino
 
 // The application's bundle identifier
-PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.purarine
+PRODUCT_BUNDLE_IDENTIFIER = dev.naominet.ichino
 
 // The copyright displayed in application information
 PRODUCT_COPYRIGHT = Copyright © 2026 dev.naominet. All rights reserved.

pubspec.lock

@@ -57,6 +57,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.2"
+  code_assets:
+    dependency: transitive
+    description:
+      name: code_assets
+      sha256: "828110d598123b5ea96c00c9f3c72105bf79f8ee36c20a39b26209ade421ec57"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
   collection:
     dependency: transitive
     description:
@@ -113,6 +121,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.0"
+  ffi_leak_tracker:
+    dependency: transitive
+    description:
+      name: ffi_leak_tracker
+      sha256: "4093d4ef9ca06ffe2786e73bfb25e22aa92112b9bb4ec941f11e3e6b61489a97"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
   file:
     dependency: transitive
     description:
@@ -153,6 +169,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.9.3+5"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: b6dc7065e46c974bc7c5f143080a6764ec7a4be6da1285ececdc37be96de53be
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -184,6 +208,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  hooks:
+    dependency: transitive
+    description:
+      name: hooks
+      sha256: eaac480a35ec0814146c2c48d96aaa829e0e44a7662c88ae84c9edf4bc35651f
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
   http:
     dependency: "direct main"
     description:
@@ -304,6 +336,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.0"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
   matcher:
     dependency: transitive
     description:
@@ -336,6 +376,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  objective_c:
+    dependency: transitive
+    description:
+      name: objective_c
+      sha256: ad56fd53a78ff6b1472fa59ff2a4e8b8ccabafc586fc263a1dfad0b99b5553e3
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.6.0"
   path:
     dependency: transitive
     description:
@@ -344,6 +392,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider:
+    dependency: transitive
+    description:
+      name: path_provider
+      sha256: a7f4874f987173da295a61c181b8ee71dab59b332a486b391babf26a1b884825
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.6"
+  path_provider_android:
+    dependency: "direct overridden"
+    description:
+      name: path_provider_android
+      sha256: "149441ca6e4f38193b2e004c0ca6376a3d11f51fa5a77552d8bd4d2b0c0912ba"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.23"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.6.0"
   path_provider_linux:
     dependency: transitive
     description:
@@ -400,6 +472,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.5.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "261236774e8b1d69cfc6b9eabbc96c40f25e7a2d6b171f3385d4f65d5734fb24"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  record_use:
+    dependency: transitive
+    description:
+      name: record_use
+      sha256: "1cb8564af8d43b464294411db9217f5ec04891c6f22ee2c32d73ae05e88a6bd2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  share_plus:
+    dependency: "direct main"
+    description:
+      name: share_plus
+      sha256: "34f00f9becd2743c1fb05363d624f9f70d37f7ccdcdda47450bc0b8c9d327b8c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "13.3.0"
+  share_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: share_plus_platform_interface
+      sha256: "365ef7379fc22507256adda3385152942ffce08935452bc972c2e52a0bebae41"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.2.0"
   shared_preferences:
     dependency: "direct main"
     description:
@@ -517,6 +621,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      sha256: "10f86fef4c2c43563fa6c211ff9cf757adf4d3ab762c56bd430664a947d70cd0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.3"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      sha256: "552f8a1e663569be95a8190206a38187b531910283c3e982193e4f2733f01029"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      sha256: "85c81589622fbc87c1c683aaea164d3604a7777495a79d91e39ffcdec39ddb34"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      sha256: "6c5ad3f22cd4c38e089b81963b3cd7bb83b111b2df5dce008bb066162f42e429"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
+  uuid:
+    dependency: transitive
+    description:
+      name: uuid
+      sha256: "9b129329f58692f6e6578329498a8fe9fbe98f090beb764ffbb8ee2eadd01dcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.6.0"
   vector_math:
     dependency: transitive
     description:
@@ -541,6 +685,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: a0b93865d5644f11cf6a8c3f6db909f1ec168958b5805f6cc684adea957cd63d
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.4.0"
   xdg_directories:
     dependency: transitive
     description:
@@ -549,6 +701,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: f67cdd8e07d3c6329146aaef1ba043542b3134c12489f553ca9a7435d1068aea
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.4"
 sdks:
   dart: ">=3.12.0 <4.0.0"
-  flutter: ">=3.38.0"
+  flutter: ">=3.38.4"

pubspec.yaml

@@ -1,4 +1,4 @@
-name: purarine
+name: ichino
 description: "A new Flutter project."
 # The following line prevents the package from being accidentally published to
 # pub.dev using `flutter pub publish`. This is preferred for private packages.
@@ -38,6 +38,14 @@ dependencies:
   archive: ^4.0.9
   pointycastle: ^3.9.1
   shared_preferences: ^2.5.5
+  share_plus: ^13.3.0
+
+# path_provider_android 2.3.x 开始依赖 jni，而 jni 把 windows/linux 也声明成了
+# ffiPlugin，只要它出现在依赖树里，桌面构建就会去链接 jvm.lib（本机只有
+# ARM64 JDK，x64 构建必然 LNK2019）。本应用不使用 path_provider，
+# 它只是 share_plus 的间接依赖，因此把 Android 实现钉在引入 jni 之前。
+dependency_overrides:
+  path_provider_android: <2.3.0
 
 dev_dependencies:
   flutter_test:
@@ -56,10 +64,8 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
-  # To add assets to your application, add an assets section, like this:
+  assets:
-  # assets:
+    - assets/b50/
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/to/resolution-aware-images

test/best50_poster_test.dart

@@ -0,0 +1,190 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ichino/config/strings.dart';
+import 'package:ichino/models/user_rating.dart';
+import 'package:ichino/pages/best50_page.dart';
+import 'package:ichino/widgets/best50_poster.dart';
+
+List<Best50CardData> _cards(int count, {String tag = 'a'}) => [
+  for (var i = 0; i < count; i++)
+    Best50CardData(
+      musicId: 1000 + i,
+      level: MusicLevel.values[i % MusicLevel.values.length],
+      title: '$tag#$i',
+      achievementText: '100.${(1000 + i).toString().padLeft(4, '0')}%',
+      comboStatus: i % 5,
+      syncStatus: i % 5,
+      ra: 50 + i,
+      rate: const [
+        'D', 'C', 'B', 'BB', 'BBB', 'A', 'AA',
+        'AAA', 'S', 'Sp', 'SS', 'SSp', 'SSS', 'SSSp',
+      ][i % 14],
+    ),
+];
+
+Future<void> _pumpPoster(
+  WidgetTester tester, {
+  required List<Best50CardData> best35,
+  required List<Best50CardData> best15,
+}) async {
+  tester.view.physicalSize = const Size(1800, 1900);
+  tester.view.devicePixelRatio = 1.0;
+  addTearDown(tester.view.reset);
+
+  await tester.pumpWidget(
+    MaterialApp(
+      home: Scaffold(
+        body: Best50Poster(
+          userName: 'Test Player',
+          iconId: 0,
+          playerRating: 12345,
+          best35: best35,
+          best15: best15,
+        ),
+      ),
+    ),
+  );
+  await tester.pump();
+}
+
+void main() {
+  group('卡片栅格坐标（对齐 Empurple）', () {
+    test('每行 5 张，列距 320、首列 65', () {
+      expect(Best50Poster.cardLeft(0), 65);
+      expect(Best50Poster.cardLeft(4), 65 + 320 * 4);
+      expect(Best50Poster.cardLeft(5), 65);
+    });
+
+    test('BEST35 区块固定从 350 起，每行下移 120', () {
+      expect(Best50Poster.cardTopBest35(0), 350);
+      expect(Best50Poster.cardTopBest35(4), 350);
+      expect(Best50Poster.cardTopBest35(5), 350 + 120);
+      expect(Best50Poster.cardTopBest35(34), 350 + 120 * 6);
+    });
+
+    test('BEST15 区块固定从 1250 起，与 BEST35 有多少条无关', () {
+      expect(Best50Poster.cardTopBest15(0), 1250);
+      expect(Best50Poster.cardTopBest15(5), 1250 + 120);
+      expect(Best50Poster.cardTopBest15(14), 1250 + 120 * 2);
+    });
+
+    test('满 50 张时最后一张不越出底图', () {
+      final right =
+          Best50Poster.cardLeft(Best50Poster.columnsPerRow - 1) +
+              Best50Poster.cardWidth;
+      final bottom =
+          Best50Poster.cardTopBest15(Best50Poster.maxBest15 - 1) +
+              Best50Poster.cardHeight;
+      expect(right, lessThanOrEqualTo(Best50Poster.canvasWidth));
+      expect(bottom, lessThanOrEqualTo(Best50Poster.canvasHeight));
+    });
+  });
+
+  group('Best50Poster 渲染', () {
+    testWidgets('满员 35+15 按底图尺寸渲染且无溢出', (tester) async {
+      await _pumpPoster(tester, best35: _cards(35), best15: _cards(15));
+
+      expect(tester.takeException(), isNull);
+      final size = tester.getSize(find.byType(Best50Poster));
+      expect(size.width, Best50Poster.canvasWidth);
+      expect(size.height, Best50Poster.canvasHeight);
+    });
+
+    testWidgets('条目不足时不报错', (tester) async {
+      await _pumpPoster(tester, best35: _cards(3), best15: const []);
+
+      expect(tester.takeException(), isNull);
+    });
+
+    testWidgets('BEST35 未打满时 BEST15 仍固定在第二区块', (tester) async {
+      // 回归用例：以前按 35+15 拼接后的全局序号算行，BEST35 不满 35 条时
+      // BEST15 会整体上移、混进上半区。
+      await _pumpPoster(tester, best35: _cards(3), best15: _cards(5, tag: 'b'));
+
+      expect(tester.takeException(), isNull);
+      final firstOf35 = tester.getTopLeft(find.text('a#0')).dy;
+      final lastOf35 = tester.getTopLeft(find.text('a#2')).dy;
+      final firstOf15 = tester.getTopLeft(find.text('b#0')).dy;
+      final lastOf15 = tester.getTopLeft(find.text('b#4')).dy;
+
+      expect(firstOf35, greaterThanOrEqualTo(Best50Poster.gridTopFirstBlock));
+      expect(lastOf35, lessThan(Best50Poster.gridTopSecondBlock));
+      expect(firstOf15, greaterThanOrEqualTo(Best50Poster.gridTopSecondBlock));
+      expect(lastOf15, greaterThanOrEqualTo(Best50Poster.gridTopSecondBlock));
+    });
+
+    testWidgets('窄视口里海报仍保持底图尺寸（FittedBox 预览）', (tester) async {
+      // 回归用例：InteractiveViewer 的 constrained 默认为 true，直接把固定尺寸的
+      // 海报当子节点会被压成视口大小——底图压扁、Positioned 的卡片掉出画布被裁掉。
+      // 中间垫一层 FittedBox 才是对的：视口拿到的是缩放后的显示，边界录到的仍是原尺寸。
+      tester.view.physicalSize = const Size(400, 900);
+      tester.view.devicePixelRatio = 1.0;
+      addTearDown(tester.view.reset);
+
+      await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: Column(
+              children: [
+                Expanded(
+                  child: InteractiveViewer(
+                    child: FittedBox(
+                      fit: BoxFit.contain,
+                      child: Best50Poster(
+                        userName: 'Test Player',
+                        iconId: 0,
+                        playerRating: 12345,
+                        best35: _cards(35),
+                        best15: _cards(15, tag: 'b'),
+                      ),
+                    ),
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      );
+      await tester.pump();
+
+      expect(tester.takeException(), isNull);
+      expect(
+        tester.getSize(find.byType(Best50Poster)),
+        const Size(
+          Best50Poster.canvasWidth,
+          Best50Poster.canvasHeight,
+        ),
+      );
+    });
+
+    testWidgets('超出上限的条目被裁剪到 35+15', (tester) async {
+      await _pumpPoster(tester, best35: _cards(60), best15: _cards(40, tag: 'b'));
+
+      expect(tester.takeException(), isNull);
+      // BEST35 只保留前 35 条，BEST15 只保留前 15 条。
+      expect(find.text('a#34'), findsOneWidget);
+      expect(find.text('a#35'), findsNothing);
+      expect(find.text('b#14'), findsOneWidget);
+      expect(find.text('b#15'), findsNothing);
+    });
+  });
+
+  testWidgets('Best50Page 在未配置 Title Server 时给出提示', (tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: Best50Page(
+            userId: 1,
+            userName: 'Nobody',
+            iconId: 0,
+            playerRating: 0,
+          ),
+        ),
+      ),
+    );
+    await tester.pump();
+
+    expect(find.text(AppStrings.ticketNotConfigured), findsOneWidget);
+    expect(find.byIcon(Icons.refresh), findsOneWidget);
+  });
+}

test/rating_calculator_test.dart

@@ -0,0 +1,80 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ichino/services/rating_calculator.dart';
+
+/// achievementRaw 接口原值（百分比 * 10000）。
+double _pct(int raw) => raw / 10000.0;
+
+void main() {
+  group('评级区间边界', () {
+    const cases = <int, String>{
+      0: 'D',
+      99999: 'D',
+      100000: 'D',
+      499999: 'D',
+      500000: 'C',
+      599999: 'C',
+      600000: 'B',
+      699999: 'B',
+      700000: 'BB',
+      749999: 'BB',
+      750000: 'BBB',
+      799999: 'BBB',
+      800000: 'A',
+      899999: 'A',
+      900000: 'AA',
+      939999: 'AA',
+      940000: 'AAA',
+      969999: 'AAA',
+      970000: 'S',
+      979999: 'S',
+      980000: 'Sp',
+      989999: 'Sp',
+      990000: 'SS',
+      994999: 'SS',
+      995000: 'SSp',
+      999999: 'SSp',
+      1000000: 'SSS',
+      1004999: 'SSS',
+      1005000: 'SSSp',
+    };
+
+    cases.forEach((raw, expected) {
+      test('$raw => $expected', () {
+        expect(RatingCalculator.compute(10.0, _pct(raw)).rate, expected);
+      });
+    });
+  });
+
+  group('RA 计算', () {
+    test('低于 10% 时 RA 为 0', () {
+      expect(RatingCalculator.computeRa(10.0, _pct(99999)), 0);
+    });
+
+    test('ds 10.0 / 100.1234% => 216', () {
+      expect(RatingCalculator.compute(10.0, _pct(1001234)).ra, 216);
+    });
+
+    test('ds 10.0 / 99.0000% => 205 (整数截断)', () {
+      expect(RatingCalculator.compute(10.0, _pct(990000)).ra, 205);
+    });
+
+    test('ds 10.0 / 100.5% 封顶 SSSp => 225', () {
+      expect(RatingCalculator.compute(10.0, _pct(1005000)).ra, 225);
+    });
+
+    test('超出 100.5% 的达成率被夹到上限', () {
+      final clamped = RatingCalculator.compute(10.0, _pct(1200000));
+      final capped = RatingCalculator.compute(10.0, _pct(1005000));
+      expect(clamped.ra, capped.ra);
+      expect(clamped.rate, capped.rate);
+    });
+
+    test('定数 13.0 / 100% => 280', () {
+      expect(RatingCalculator.compute(13.0, _pct(1000000)).ra, 280);
+    });
+
+    test('缺失定数 (ds=0) 时 RA 为 0', () {
+      expect(RatingCalculator.computeRa(0.0, _pct(1005000)), 0);
+    });
+  });
+}

test/widget_test.dart

@@ -1,14 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:purarine/main.dart';
+import 'package:ichino/main.dart';
 
 void main() {
   testWidgets('App renders login page with app title', (WidgetTester tester) async {
     await tester.pumpWidget(const MyApp());
     await tester.pump();
 
-    expect(find.text('Purarine'), findsWidgets);
+    expect(find.text('Ichino'), findsWidgets);
     expect(find.byType(MaterialApp), findsOneWidget);
   });
 }

web/index.html

@@ -5,14 +5,14 @@
 
   <meta charset="UTF-8">
   <meta content="IE=Edge" http-equiv="X-UA-Compatible">
-  <meta name="description" content="Purarine - maimaidx login client">
+  <meta name="description" content="Ichino - maimaidx login client">
   <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black">
-  <meta name="apple-mobile-web-app-title" content="Purarine">
+  <meta name="apple-mobile-web-app-title" content="Ichino">
   <link rel="apple-touch-icon" href="icons/Icon-192.png">
   <link rel="icon" type="image/png" href="favicon.png"/>
 
-  <title>Purarine</title>
+  <title>Ichino</title>
   <link rel="manifest" href="manifest.json">
 
   <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jsQR.js"></script>

web/manifest.json

@@ -1,6 +1,6 @@
 {
-    "name": "Purarine",
+    "name": "Ichino",
-    "short_name": "Purarine",
+    "short_name": "Ichino",
     "start_url": ".",
     "display": "standalone",
     "background_color": "#0175C2",

windows/CMakeLists.txt

@@ -1,10 +1,10 @@
 # Project-level configuration.
 cmake_minimum_required(VERSION 3.14)
-project(purarine LANGUAGES CXX)
+project(ichino LANGUAGES CXX)
 
 # The name of the executable created for the application. Change this to change
 # the on-disk name of your application.
-set(BINARY_NAME "purarine")
+set(BINARY_NAME "ichino")
 
 # Explicitly opt in to modern CMake behaviors to avoid warnings with recent
 # versions of CMake.

windows/flutter/generated_plugin_registrant.cc

@@ -7,8 +7,14 @@
 #include "generated_plugin_registrant.h"
 
 #include <file_selector_windows/file_selector_windows.h>
+#include <share_plus/share_plus_windows_plugin_c_api.h>
+#include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   FileSelectorWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FileSelectorWindows"));
+  SharePlusWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("SharePlusWindowsPluginCApi"));
+  UrlLauncherWindowsRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }

windows/flutter/generated_plugins.cmake

@@ -4,6 +4,8 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_windows
+  share_plus
+  url_launcher_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

windows/runner/Runner.rc

@@ -90,12 +90,12 @@ BEGIN
         BLOCK "040904e4"
         BEGIN
             VALUE "CompanyName", "dev.naominet" "\0"
-            VALUE "FileDescription", "Purarine" "\0"
+            VALUE "FileDescription", "Ichino" "\0"
             VALUE "FileVersion", VERSION_AS_STRING "\0"
-            VALUE "InternalName", "purarine" "\0"
+            VALUE "InternalName", "ichino" "\0"
             VALUE "LegalCopyright", "Copyright (C) 2026 dev.naominet. All rights reserved." "\0"
-            VALUE "OriginalFilename", "purarine.exe" "\0"
+            VALUE "OriginalFilename", "ichino.exe" "\0"
-            VALUE "ProductName", "Purarine" "\0"
+            VALUE "ProductName", "Ichino" "\0"
             VALUE "ProductVersion", VERSION_AS_STRING "\0"
         END
     END

windows/runner/main.cpp

@@ -27,7 +27,7 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
   FlutterWindow window(project);
   Win32Window::Point origin(10, 10);
   Win32Window::Size size(1280, 720);
-  if (!    window.Create(L"Purarine", origin, size)) {
+  if (!    window.Create(L"Ichino", origin, size)) {
     return EXIT_FAILURE;
   }
   window.SetQuitOnClose(true);