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。

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 "ProductName", "Purarine" "\0"
+            VALUE "OriginalFilename", "ichino.exe" "\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);