using UnityEditor;
using UnityEngine;
using SynapticAIPro;

namespace SynapticPro
{
    /// <summary>
    /// Changelog dialog shown on first import or version update
    /// </summary>
    [InitializeOnLoad]
    public class NexusChangelogWindow : EditorWindow
    {
        private static string CURRENT_VERSION => NexusVersion.Current;
        private const string PREF_KEY_LAST_VERSION = "SynapticPro_LastShownVersion";
        private const string PREF_KEY_DONT_SHOW = "SynapticPro_DontShowChangelog";
        private const string PREF_KEY_LANGUAGE = "SynapticPro_ChangelogLanguage";

        private enum Language { English, Japanese }
        private static Language currentLanguage = Language.English;

        private static bool dontShowAgain = false;
        private Vector2 scrollPosition;

        static NexusChangelogWindow()
        {
            EditorApplication.delayCall += ShowOnStartupIfNeeded;
        }

        private static void ShowOnStartupIfNeeded()
        {
            // Don't show during play mode
            if (EditorApplication.isPlayingOrWillChangePlaymode)
                return;

            // Check if user disabled
            if (EditorPrefs.GetBool(PREF_KEY_DONT_SHOW, false))
                return;

            // Check if already shown for this version
            string lastVersion = EditorPrefs.GetString(PREF_KEY_LAST_VERSION, "");
            if (lastVersion == CURRENT_VERSION)
                return;

            // Show dialog
            ShowWindow();

            // Mark as shown
            EditorPrefs.SetString(PREF_KEY_LAST_VERSION, CURRENT_VERSION);
        }

        [MenuItem("Tools/Synaptic Pro/What's New", false, 100)]
        public static void ShowWindow()
        {
            var window = GetWindow<NexusChangelogWindow>(true, "Synaptic AI Pro - What's New", true);
            window.minSize = new Vector2(500, 450);
            window.maxSize = new Vector2(600, 650);
            window.ShowUtility();
        }

        private void OnEnable()
        {
            dontShowAgain = EditorPrefs.GetBool(PREF_KEY_DONT_SHOW, false);
            currentLanguage = (Language)EditorPrefs.GetInt(PREF_KEY_LANGUAGE, 0);
        }

        private void OnGUI()
        {
            // Language selector (top right)
            EditorGUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();
            GUILayout.Label(currentLanguage == Language.English ? "Language:" : "言語:", GUILayout.Width(60));
            var newLang = (Language)EditorGUILayout.Popup((int)currentLanguage, new string[] { "English", "日本語" }, GUILayout.Width(80));
            if (newLang != currentLanguage)
            {
                currentLanguage = newLang;
                EditorPrefs.SetInt(PREF_KEY_LANGUAGE, (int)currentLanguage);
            }
            EditorGUILayout.EndHorizontal();

            // Header
            GUILayout.Space(5);
            var headerStyle = new GUIStyle(EditorStyles.boldLabel)
            {
                fontSize = 20,
                alignment = TextAnchor.MiddleCenter
            };
            GUILayout.Label($"Synaptic AI Pro v{CURRENT_VERSION}", headerStyle);
            GUILayout.Space(5);

            var subtitleStyle = new GUIStyle(EditorStyles.label)
            {
                alignment = TextAnchor.MiddleCenter,
                fontStyle = FontStyle.Italic
            };
            GUILayout.Label(L("What's New", "更新内容"), subtitleStyle);

            GUILayout.Space(15);

            // Changelog content
            scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);

            DrawChangelogContent();

            EditorGUILayout.EndScrollView();

            GUILayout.Space(10);

            // Don't show again toggle
            EditorGUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();
            bool newDontShow = EditorGUILayout.ToggleLeft(
                L("Don't show on startup", "起動時に表示しない"),
                dontShowAgain, GUILayout.Width(180));
            if (newDontShow != dontShowAgain)
            {
                dontShowAgain = newDontShow;
                EditorPrefs.SetBool(PREF_KEY_DONT_SHOW, dontShowAgain);
            }
            EditorGUILayout.EndHorizontal();

            GUILayout.Space(5);

            // Buttons
            EditorGUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();

            if (GUILayout.Button(L("Open Setup", "セットアップを開く"), GUILayout.Width(120), GUILayout.Height(30)))
            {
                NexusMCPSetupWindow.ShowWindow();
                Close();
            }

            GUILayout.Space(10);

            if (GUILayout.Button(L("Close", "閉じる"), GUILayout.Width(80), GUILayout.Height(30)))
            {
                Close();
            }

            GUILayout.FlexibleSpace();
            EditorGUILayout.EndHorizontal();

            GUILayout.Space(10);
        }

        // Localization helper
        private string L(string en, string ja)
        {
            return currentLanguage == Language.Japanese ? ja : en;
        }

        private void DrawChangelogContent()
        {
            var sectionStyle = new GUIStyle(EditorStyles.boldLabel)
            {
                fontSize = 14
            };

            var itemStyle = new GUIStyle(EditorStyles.label)
            {
                wordWrap = true,
                richText = true
            };

            // v1.2.23
            GUILayout.Label(L("v1.2.23 - run_csharp result capture + HTTP server stability", "v1.2.23 - run_csharp 戻り値捕捉 + HTTP サーバー安定化"), sectionStyle);
            GUILayout.Space(5);
            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix (ESC-0107): run_csharp returned result:null for most snippets</b>", "<b>★ 修正 (ESC-0107): run_csharp が殆どの snippet で result:null を返していた問題</b>"), itemStyle);
            GUILayout.Label(L("• Mono.CSharp.Evaluator.Run discards return values. We now detect the last top-level return keyword (depth-aware) and rewrite `return X;` into a static-field sink call, capturing X across multi-statement bodies / foreach{}/if{} blocks / multiplication expressions.", "• Mono.CSharp.Evaluator.Run は戻り値を破棄するため、最後の top-level return キーワードを深度考慮で検出し、`return X;` を静的フィールド経由の sink 呼び出しに書き換え。複文 / foreach { } / if { } / 乗算式すべてで X が捕捉されるようになった"), itemStyle);
            GUILayout.Label(L("• Application.logMessageReceived hook added so Debug.Log / LogWarning / LogError lines appear in the `output` field (was missing — only Console.Out was captured)", "• Application.logMessageReceived フック追加。Debug.Log / LogWarning / LogError が output フィールドに反映 (従来は Console.Out のみで取得漏れ)"), itemStyle);
            GUILayout.Label(L("• Known limitation: Mono parser cannot instantiate generic TYPES (new List&lt;int&gt;() etc). Workaround: use arrays / ArrayList / generic methods (FindObjectsByType&lt;T&gt;)", "• 既知制限: Mono パーサが generic 型インスタンス化 (new List&lt;int&gt;() 等) を解釈できない。回避策は配列 / ArrayList / generic メソッド (FindObjectsByType&lt;T&gt;) 利用"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix (ESC-0108): HTTP server WebSocket dropped every ~30s</b>", "<b>★ 修正 (ESC-0108): HTTP サーバー WebSocket が約30秒で切断</b>"), itemStyle);
            GUILayout.Label(L("• Mono ClientWebSocket doesn't auto-pong protocol-level pings (unlike .NET 5+). Node side terminated the connection every heartbeat interval", "• Mono ClientWebSocket は .NET 5+ と異なり protocol-level ping に自動 pong しない。結果 Node 側が毎ハートビートで切断"), itemStyle);
            GUILayout.Label(L("• http-server.js heartbeat now uses last-message-seen timestamps. Configurable via UNITY_STALE_TIMEOUT_MS env (default 60s)", "• http-server.js の heartbeat を last-message-seen 方式に置換。UNITY_STALE_TIMEOUT_MS 環境変数で調整可 (デフォルト 60s)"), itemStyle);
            GUILayout.Label(L("• Reported and verified by xvpower. — thank you!", "• xvpower. さん報告・検証ありがとうございます"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: HTTP server died on macOS/Linux during domain reload</b>", "<b>★ 修正: macOS/Linux で domain reload のたびに HTTP サーバーが死亡</b>"), itemStyle);
            GUILayout.Label(L("• Previous Process.Start with piped stdout/stderr caused node to hit SIGPIPE when Unity's C# domain reloaded the pipe readers", "• 旧 Process.Start は stdout/stderr を C# 側 pipe にリダイレクトしており、domain reload で pipe reader が消えて node が SIGPIPE で死亡"), itemStyle);
            GUILayout.Label(L("• Replaced with `nohup node ... >log 2>&1 </dev/null &` detach. Process is independent of Unity's lifecycle, survives all recompiles", "• `nohup node ... >log 2>&1 </dev/null &` 経由の detach に変更。Unity ライフサイクルから独立、recompile で死なない"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: Auto Reconnect didn't engage on fresh installs</b>", "<b>★ 修正: 新規インストール時に Auto Reconnect が機能しなかった問題</b>"), itemStyle);
            GUILayout.Label(L("• enableMCP default flipped from false → true. Unity is always a CLIENT of the MCP server (port 8090), the opt-in flag was a UX trap", "• enableMCP デフォルトを false → true に変更。Unity は常に MCP サーバー (port 8090) のクライアントなので opt-in 必要なフラグは UX トラップだった"), itemStyle);
            GUILayout.Label(L("• Manual AI Reconnect, Auto Reconnect toggle, and successful connect all force enableMCP=true so it persists across domain reloads", "• 手動 AI Reconnect、Auto Reconnect トグル、接続成功時のいずれでも enableMCP=true を永続化、domain reload を跨いで維持"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Added: AI Connection tab connection-controls bar</b>", "<b>★ 追加: AI Connection タブに接続コントロールバー</b>"), itemStyle);
            GUILayout.Label(L("• Live MCP status indicator + `AI Reconnect` button (silent) + `Auto Reconnect` checkbox + `Discord` shortcut. Surfaces Tools-menu items in the Setup window where users actually troubleshoot", "• MCP 接続ライブステータス + `AI Reconnect` ボタン (確認ダイアログなし) + `Auto Reconnect` チェックボックス + `Discord` ショートカット。Tools メニュー項目をユーザーが普段デバッグする Setup Window 内に集約"), itemStyle);
            GUILayout.Label(L("• MCP Server: Start/Stop kept in Tools menu (advanced)", "• MCP Server: Start/Stop は引き続き Tools メニュー (上級向け)"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: port-mapping JSON corruption infinite log loop</b>", "<b>★ 修正: port-mapping JSON 破損による Console ログ無限ループ</b>"), itemStyle);
            GUILayout.Label(L("• NexusProjectPortManager.LoadMapping recovery now deletes .backup before File.Move, then writes a fresh empty mapping. Previously the silent catch left the corrupt file in place, causing frame-rate Console spam after any concurrent write race", "• NexusProjectPortManager.LoadMapping の復旧処理を強化。.backup を事前削除し、復旧後すぐ空の有効 JSON を書き出す。従来は silent catch で破損ファイルが残存し書き込み競合後に毎フレーム Console エラーが出続けていた"), itemStyle);

            EditorGUILayout.EndVertical();
            GUILayout.Space(15);

            // v1.2.22
            GUILayout.Label(L("v1.2.22 - EMERGENCY HOTFIX: MCP timeout (ESC-0102)", "v1.2.22 - 緊急修正: MCP timeout 問題 (ESC-0102)"), sectionStyle);
            GUILayout.Space(5);
            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Critical fix: MCP timeout after v1.2.20/21 update</b>", "<b>★ 重要修正: v1.2.20/21 アップデート後の MCP タイムアウト</b>"), itemStyle);
            GUILayout.Label(L("• SynLog.Info called EditorPrefs.GetBool on every log — main-thread only, threw silently on background WebSocket Receive thread and killed the listener Task", "• SynLog.Info が毎回 EditorPrefs.GetBool を呼び、これがメインスレッド限定だったため WebSocket 受信スレッドで例外を投げ、リスナータスクが silent kill されていた"), itemStyle);
            GUILayout.Label(L("• Fix: SynLog now caches verbose flag in a volatile bool, initialized via [InitializeOnLoadMethod]", "• 修正: SynLog の verbose flag を volatile bool でキャッシュ、[InitializeOnLoadMethod] で初期化"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: NexusEditorMCPService reconnect storm</b>", "<b>★ 修正: NexusEditorMCPService 再接続ストーム</b>"), itemStyle);
            GUILayout.Label(L("• lastConnectionCheckTime was written via Stopwatch-since-classload but compared against Time.realtimeSinceStartup. After domain reload Stopwatch reset to 0 → reconnect gate always true → reconnects every frame", "• lastConnectionCheckTime が Stopwatch ベースで書き込まれ、Time.realtimeSinceStartup で読まれていた。ドメインリロード後に Stopwatch=0 になり差分が常に大きく、毎フレーム再接続ループ発生"), itemStyle);
            GUILayout.Label(L("• Fix: ThreadSafeTime() now calibrates against Time.realtimeSinceStartup on first main-thread tick", "• 修正: ThreadSafeTime() を初回 main-thread tick で Time.realtimeSinceStartup と同期キャリブレーション"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ New: unity_run_csharp tool (equivalent of Blender's run_python)</b>", "<b>★ 新規: unity_run_csharp ツール (Blender run_python 相当)</b>"), itemStyle);
            GUILayout.Label(L("• Execute arbitrary C# against the running Editor — UnityEngine / UnityEditor / Linq / Newtonsoft.Json pre-imported", "• 任意 C# を Editor 内で実行可能。UnityEngine / UnityEditor / Linq / Newtonsoft.Json プリインポート済み"), itemStyle);
            GUILayout.Label(L("• Uses Mono.CSharp.Evaluator instance API + AppDomain assembly injection, does NOT trigger AssemblyReload", "• Mono.CSharp.Evaluator のインスタンス API + AppDomain アセンブリ注入。AssemblyReload を起こさない"), itemStyle);
            GUILayout.Label(L("• Promoted to a SuperSave top-level meta-tool for direct invocation", "• SuperSave のトップレベル meta-tool に昇格、直接呼び出し可"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Diagnostics</b>", "<b>★ 診断改善</b>"), itemStyle);
            GUILayout.Label(L("• index-supersave.js: ws error handlers, send callback, connection diagnostics", "• index-supersave.js: ws エラーハンドラ、send コールバック、接続診断ログ追加"), itemStyle);
            GUILayout.Label(L("• NexusWebSocketClient.ReceiveLoop (HTTP path): fixed missing EndOfMessage concatenation that truncated >4KB messages", "• NexusWebSocketClient.ReceiveLoop (HTTP 経路): 4KB 超メッセージが切れる EndOfMessage 連結欠落バグ修正"), itemStyle);

            EditorGUILayout.EndVertical();
            GUILayout.Space(15);

            // v1.2.21
            GUILayout.Label(L("v1.2.21 - Windows HTTP Server Cascade Kill Fix (ESC-0095)", "v1.2.21 - Windows HTTP サーバー連鎖死問題の修正 (ESC-0095)"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Root cause finally identified</b>", "<b>★ 長年未解決だった根本原因を特定</b>"), itemStyle);
            GUILayout.Label(L("• Unity Editor on Windows assigns itself a Win32 Job Object with KILL_ON_JOB_CLOSE", "• Unity Editor (Windows) は自身を Win32 Job Object に登録し KILL_ON_JOB_CLOSE フラグで管理している"), itemStyle);
            GUILayout.Label(L("• Process.Start children inherit the Job and die on assembly reload / PlayMode transitions", "• Process.Start で起動した子プロセスはこの Job を継承し、アセンブリリロード / PlayMode 遷移で殺される"), itemStyle);
            GUILayout.Label(L("• This is why the v1.2.10 → v1.2.11 internal→external rewrite did not fix it (node.exe was still in Unity's Job)", "• v1.2.10 → v1.2.11 で内部 C# → 外部 Node.js に切り出しても改善しなかったのはこのため (node.exe も Unity の Job 内にいた)"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: CreateProcessW with CREATE_BREAKAWAY_FROM_JOB</b>", "<b>★ 修正: CreateProcessW + CREATE_BREAKAWAY_FROM_JOB</b>"), itemStyle);
            GUILayout.Label(L("• On Windows, node.exe is now spawned via P/Invoke CreateProcessW with BREAKAWAY_FROM_JOB | DETACHED_PROCESS | NEW_PROCESS_GROUP", "• Windows では P/Invoke で CreateProcessW を直接呼び、BREAKAWAY_FROM_JOB | DETACHED_PROCESS | NEW_PROCESS_GROUP を立てて spawn"), itemStyle);
            GUILayout.Label(L("• The spawned node.exe now runs fully independent of Unity's Job Object", "• 起動した node.exe は Unity の Job から完全に独立"), itemStyle);
            GUILayout.Label(L("• Same technique used by Unity's own Burst Compiler (BclApp.cs)", "• Unity 公式の Burst Compiler (BclApp.cs) と同じ技法"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: PID Recovery After Domain Reload</b>", "<b>★ 修正: ドメインリロード後の PID 復元</b>"), itemStyle);
            GUILayout.Label(L("• Node PID stored in SessionState + EditorPrefs", "• Node PID を SessionState + EditorPrefs に保存"), itemStyle);
            GUILayout.Label(L("• [InitializeOnLoadMethod] re-attaches by PID after reload and reconnects WebSocket only", "• [InitializeOnLoadMethod] でリロード後に PID から再接続。WebSocket だけ繋ぎ直し"), itemStyle);
            GUILayout.Label(L("• No more 'Connect Unity Only' button required after script edits", "• スクリプト編集後に 'Connect Unity Only' を押す必要が無くなる"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: Parent-PID Watchdog (orphan guard)</b>", "<b>★ 修正: 親 PID watchdog (孤児防止)</b>"), itemStyle);
            GUILayout.Label(L("• http-server.js now self-terminates 5s after Unity dies", "• http-server.js は Unity 死亡後 5秒以内に self-exit"), itemStyle);
            GUILayout.Label(L("• Prevents zombie node.exe even when BREAKAWAY succeeds", "• BREAKAWAY 成功時でも node.exe ゾンビ化を防止"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Change: Detached log file</b>", "<b>★ 変更: detached モードのログファイル化</b>"), itemStyle);
            GUILayout.Label(L("• DETACHED_PROCESS breaks stdout pipes, so node now writes to MCPServer/logs/http-server.log", "• DETACHED_PROCESS では stdout パイプが使えないため node 側でログファイル直書き (MCPServer/logs/http-server.log)"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ macOS / Linux behaviour unchanged</b>", "<b>★ macOS / Linux は従来通り</b>"), itemStyle);
            GUILayout.Label(L("• No Job-Object-equivalent cascade-kill on these platforms — legacy Process.Start path retained", "• Job Object 相当の仕組みが無いため、従来の Process.Start 経路を維持"), itemStyle);

            EditorGUILayout.EndVertical();
            GUILayout.Space(15);

            // v1.2.20
            GUILayout.Label(L("v1.2.20 - Async Crash Fix & Log Cleanup", "v1.2.20 - 非同期クラッシュ修正 & ログ整理"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Async Thread Crash on Disconnect (ESC-0025)</b>", "<b>★ 修正: 切断時の非同期スレッドクラッシュ (ESC-0025)</b>"), itemStyle);
            GUILayout.Label(L("• OnConnectionLost no longer crashes when called from non-main threads", "• OnConnectionLost がメインスレッド外から呼ばれてもクラッシュしない"), itemStyle);
            GUILayout.Label(L("• Introduced ThreadSafeTime() using Stopwatch for async-safe timing", "• Stopwatch ベースの ThreadSafeTime() を導入し非同期安全な時刻取得に"), itemStyle);
            GUILayout.Label(L("• Tool execution self-recovers without Unity restart", "• Unity を再起動せずにツール実行が自己復旧"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Change: Verbose Log Toggle</b>", "<b>★ 変更: 詳細ログのトグル</b>"), itemStyle);
            GUILayout.Label(L("• Setup Window > HTTP Server > 'Verbose Logs' toggle", "• Setup Window > HTTP Server > 'Verbose Logs' で切り替え"), itemStyle);
            GUILayout.Label(L("• Errors are always logged regardless of toggle", "• Error は常に表示される"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Change: Smaller Setup Window Min Size</b>", "<b>★ 変更: Setup Window の最小サイズ縮小</b>"), itemStyle);
            GUILayout.Label(L("• 800x800 → 480x480, fits on small laptops and dockable", "• 800x800 → 480x480、小型ラップトップやドッキングに対応"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Safeguard: Auto-Update Validation</b>", "<b>★ セーフガード: 自動アップデート検証</b>"), itemStyle);
            GUILayout.Label(L("• File size and marker checks prevent partial-archive overwrites", "• ファイルサイズとマーカー検証で破損アーカイブによる上書きを防止"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: Main Window Repaint Recursion</b>", "<b>★ 修正: メインウィンドウ再描画の無限再帰</b>"), itemStyle);
            GUILayout.Label(L("• ThrottledRepaint() no longer recurses into itself", "• ThrottledRepaint() が自分自身を呼び続ける問題を修正"), itemStyle);

            EditorGUILayout.EndVertical();
            GUILayout.Space(15);

            // v1.2.19
            GUILayout.Label(L("v1.2.19 - Windows Stability (Community Contribution)", "v1.2.19 - Windows安定性 (コミュニティ貢献)"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Windows HTTP WebSocket Stability</b>", "<b>★ 修正: Windows HTTP WebSocket安定性</b>"), itemStyle);
            GUILayout.Label(L("• Fixed HTTP server tab becoming unresponsive on Windows", "• WindowsでHTTPサーバータブが無反応になる問題を修正"), itemStyle);
            GUILayout.Label(L("• Added reentrancy guard to prevent concurrent WebSocket connections", "• 同時WebSocket接続を防ぐ再入ガードを追加"), itemStyle);
            GUILayout.Label(L("• Connect timeout (5s) prevents indefinite hang", "• 接続タイムアウト(5秒)で無限ハングを防止"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: MCP Reconnect Storm Prevention</b>", "<b>★ 修正: MCPリコネクト嵐の防止</b>"), itemStyle);
            GUILayout.Label(L("• Added 10-second minimum interval between reconnect attempts", "• リコネクト試行間に最低10秒のインターバル追加"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ Fix: Setup Window UI Freeze</b>", "<b>★ 修正: Setup Window UIフリーズ</b>"), itemStyle);
            GUILayout.Label(L("• Port check moved to background thread", "• ポートチェックをバックグラウンドスレッドに移動"), itemStyle);
            GUILayout.Label(L("• Main Window repaint throttled to 10Hz", "• メインウィンドウの再描画を10Hzに制限"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ New: MCP Server Start/Stop Menu</b>", "<b>★ 新機能: MCP Server Start/Stopメニュー</b>"), itemStyle);
            GUILayout.Label(L("• Tools > Synaptic Pro > MCP Server: Start/Stop", "• Tools > Synaptic Pro > MCP Server: Start/Stop"), itemStyle);

            GUILayout.Space(5);
            var creditStyle = new GUIStyle(itemStyle) { fontStyle = FontStyle.Italic };
            GUILayout.Label(L("Special thanks to OverlordMethuselah777 for contributing these fixes!", "OverlordMethuselah777氏の修正貢献に感謝します！"), creditStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.18
            GUILayout.Label(L("v1.2.18 - Auto-Update & WebSocket Stability", "v1.2.18 - 自動アップデート・WebSocket安定性"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ New: Auto-Update System</b>", "<b>★ 新機能: 自動アップデート</b>"), itemStyle);
            GUILayout.Label(L("• Update check on Unity startup (once per day)", "• Unity起動時にアップデート確認（1日1回）"), itemStyle);
            GUILayout.Label(L("• One-click update from Setup Window banner", "• Setup Windowのバナーからワンクリック更新"), itemStyle);
            GUILayout.Label(L("<b>★ Fix: WebSocket Connection Stability</b>", "<b>★ 修正: WebSocket接続安定性</b>"), itemStyle);
            GUILayout.Label(L("• Added ping/pong heartbeat every 30 seconds", "• 30秒ごとのping/pongハートビート追加"), itemStyle);
            GUILayout.Label(L("• Reconnect attempts increased to 30 (2s intervals)", "• 再接続試行を30回に増加（2秒間隔）"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.17
            GUILayout.Label(L("v1.2.17 - Editor Performance Fix", "v1.2.17 - エディタパフォーマンス修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: HTTP Server Tab Performance</b>", "<b>★ 修正: HTTP Serverタブのパフォーマンス</b>"), itemStyle);
            GUILayout.Label(L("• Fixed editor slowdown when HTTP Server tab is open but server not started", "• HTTPサーバー未起動時にHTTP Serverタブを開くとエディタが重くなる問題を修正"), itemStyle);
            GUILayout.Label(L("• Server status check now runs every 5 seconds instead of every frame", "• サーバーステータス確認を毎フレームから5秒間隔に変更"), itemStyle);
            GUILayout.Label(L("• Added UTF-8 encoding for Node.js process output", "• Node.jsプロセス出力のUTF-8エンコーディングを追加"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.16
            GUILayout.Label(L("v1.2.16 - Unity 6 GUILayout Fix", "v1.2.16 - Unity 6 GUILayout修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Unity 6 GUILayout & Auto-Start</b>", "<b>★ 修正: Unity 6 GUILayout・Auto-Start</b>"), itemStyle);
            GUILayout.Label(L("• Fixed GUILayout Begin/End mismatch error in DrawHeader and HTTP Server UI", "• DrawHeaderとHTTP Server UIのGUILayout Begin/End不一致エラーを修正"), itemStyle);
            GUILayout.Label(L("• Fixed Auto-Start not working after domain reload", "• ドメインリロード後にAuto-Startが動作しない問題を修正"), itemStyle);
            GUILayout.Label(L("• Auto-Start now detects existing server and reconnects instead of restarting", "• Auto-Start時に既存サーバーを検出し再接続するように改善"), itemStyle);
            GUILayout.Label(L("• Added UTF-8 encoding for Node.js process output", "• Node.jsプロセス出力のUTF-8エンコーディングを追加"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.15
            GUILayout.Label(L("v1.2.15 - Setup Window Performance Fix", "v1.2.15 - Setup Windowパフォーマンス修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Setup Window Freeze on Large Projects</b>", "<b>★ 修正: 大規模プロジェクトでのSetup Windowフリーズ</b>"), itemStyle);
            GUILayout.Label(L("• FindMCPServerPath now uses cached result instead of searching every call", "• FindMCPServerPathの結果をキャッシュし毎回の検索を排除"), itemStyle);
            GUILayout.Label(L("• Eliminated recursive AllDirectories search that caused 'Hold on' dialog on large projects", "• 大規模プロジェクトで「Hold on」を引き起こしていた再帰的全ディレクトリ検索を廃止"), itemStyle);
            GUILayout.Label(L("• PackageCache search limited to com.synaptic* packages only", "• PackageCache検索をcom.synaptic*パッケージのみに限定"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.14
            GUILayout.Label(L("v1.2.14 - Windows Stability & Process Management Fix", "v1.2.14 - Windows安定性・プロセス管理修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Hold on Dialog & Process Cleanup</b>", "<b>★ 修正: Hold onダイアログ・プロセス管理</b>"), itemStyle);
            GUILayout.Label(L("• Fixed 'Hold on' dialog caused by blocking CheckSetupStatus on main thread", "• メインスレッドをブロックするCheckSetupStatusによる「Hold on」を修正"), itemStyle);
            GUILayout.Label(L("• Improved Windows command path detection (git/node/npm) - matching MCP config robustness", "• Windowsでのコマンドパス検出を強化（git/node/npm）- MCP設定と同等の堅牢性"), itemStyle);
            GUILayout.Label(L("• Node.js process now properly killed on Unity quit and domain reload", "• Unity終了時・ドメインリロード時にNode.jsプロセスを確実に停止"), itemStyle);
            GUILayout.Label(L("• Auto-Start now kills stale processes before launching", "• Auto-Start時に残存プロセスを終了してから起動"), itemStyle);
            GUILayout.Label(L("• Fixed MCP port conflict when multiple Claude Code sessions connect", "• 複数Claude Codeセッション接続時のMCPポート競合を修正"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.13
            GUILayout.Label(L("v1.2.13 - Setup Window Stability Fix", "v1.2.13 - Setup Window安定性修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Setup Window Repaint Loop</b>", "<b>★ 修正: Setup Windowの再描画ループ</b>"), itemStyle);
            GUILayout.Label(L("• Fixed 'Hold on' dialog appearing endlessly when switching tabs during MCP connection", "• MCP接続中にタブを切り替えると「Hold on」ダイアログが無限に出る問題を修正"), itemStyle);
            GUILayout.Label(L("• Repaint animation now only runs on AI Connection tab", "• 再描画アニメーションをAI Connectionタブのみに限定"), itemStyle);
            GUILayout.Label(L("• Reduced console debug log output", "• コンソールのデバッグログ出力を削減"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.12
            GUILayout.Label(L("v1.2.12 - Windows HTTP Server Fix", "v1.2.12 - Windows HTTPサーバー修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Fix: Windows HTTP Server Launch</b>", "<b>★ 修正: Windows HTTPサーバー起動</b>"), itemStyle);
            GUILayout.Label(L("• Fixed HTTP Server failing to start on Windows when project path contains spaces", "• プロジェクトパスにスペースが含まれる場合にHTTPサーバーが起動しない問題を修正"), itemStyle);
            GUILayout.Label(L("• Windows now launches Node.js via cmd.exe for reliable path handling", "• Windowsではcmd.exe経由でNode.jsを起動し、パス処理の信頼性を向上"), itemStyle);
            GUILayout.Label(L("• Improved WebSocket connection retry logic (3 attempts with 2s intervals)", "• WebSocket接続のリトライロジックを改善（2秒間隔で3回リトライ）"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.11
            GUILayout.Label(L("v1.2.11 - Claude Desktop CWD Fix", "v1.2.11 - Claude Desktop CWD修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Critical Fix: Claude Desktop MCP Configuration</b>", "<b>★ 重要修正: Claude Desktop MCP設定</b>"), itemStyle);
            GUILayout.Label(L("• Added missing 'cwd' to Claude Desktop config (was only set for VS Code/Gemini/Cursor)", "• Claude Desktop設定に欠けていた'cwd'を追加（VS Code/Gemini/Cursor用には設定済みだった）"), itemStyle);
            GUILayout.Label(L("• Fixes connection timeout on non-standard paths (spaces, Japanese, external drives)", "• 非標準パス（スペース、日本語、外部ドライブ）での接続タイムアウトを修正"), itemStyle);
            GUILayout.Label(L("• Node.js now runs from MCPServer directory for reliable require() resolution", "• Node.jsがMCPServerディレクトリから実行され、require()の解決が確実に"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.10
            GUILayout.Label(L("v1.2.10 - MCP Process Fix & Resources", "v1.2.10 - MCPプロセス修正 & リソース"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Critical Fix: MCP Dual-Process Startup Bug</b>", "<b>★ 重要修正: MCP二重プロセス起動バグ</b>"), itemStyle);
            GUILayout.Label(L("• Fixed Claude Code starting 2 MCP processes simultaneously", "• Claude Codeが2つのMCPプロセスを同時起動する問題を修正"), itemStyle);
            GUILayout.Label(L("• Added retry logic with WebSocket shutdown handover", "• WebSocketシャットダウンハンドオーバー付きリトライロジック追加"), itemStyle);
            GUILayout.Label(L("• Graceful process takeover for reliable connection", "• 確実な接続のためのグレースフルプロセステイクオーバー"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ New: MCP Resources Protocol</b>", "<b>★ 新機能: MCPリソースプロトコル</b>"), itemStyle);
            GUILayout.Label(L("• synaptic://tools/reference - Compact tools reference", "• synaptic://tools/reference - コンパクトツールリファレンス"), itemStyle);
            GUILayout.Label(L("• synaptic://tools/reference/full - Full with inputSchema", "• synaptic://tools/reference/full - inputSchema付きフル版"), itemStyle);
            GUILayout.Label(L("• GET /resources, /resources/read HTTP endpoints", "• GET /resources, /resources/read HTTPエンドポイント"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.9
            GUILayout.Label(L("v1.2.9 - TcpListener HTTP Server", "v1.2.9 - TcpListener HTTPサーバー"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Critical Fix: Windows Port Reuse (Domain Reload)</b>", "<b>★ 重要修正: Windowsポート再利用 (ドメインリロード)</b>"), itemStyle);
            GUILayout.Label(L("• Replaced HttpListener with TcpListener", "• HttpListenerをTcpListenerに置換"), itemStyle);
            GUILayout.Label(L("• Added SO_REUSEADDR socket option", "• SO_REUSEADDRソケットオプション追加"), itemStyle);
            GUILayout.Label(L("• Bypasses HTTP.sys kernel driver on Windows", "• WindowsでHTTP.sysカーネルドライバをバイパス"), itemStyle);
            GUILayout.Label(L("• Reliable port recovery after script recompilation", "• スクリプトリコンパイル後のポート復帰が確実に"), itemStyle);
            GUILayout.Label(L("• Removed dangerous ForceKillPortProcess code", "• 危険なForceKillPortProcessコードを削除"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.8
            GUILayout.Label(L("v1.2.8 - Tool Search & Material Fix", "v1.2.8 - ツール検索 & マテリアル修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ New: Tool Search Endpoint</b>", "<b>★ 新機能: ツール検索エンドポイント</b>"), itemStyle);
            GUILayout.Label(L("• GET /tools/search?q=keyword - Search by name, title, description", "• GET /tools/search?q=keyword - 名前・タイトル・説明で検索"), itemStyle);
            GUILayout.Label(L("• Optional category filter and result limit", "• カテゴリフィルタと結果数制限をサポート"), itemStyle);
            GUILayout.Label(L("• Relevance scoring for better results", "• 関連性スコアリングで最適な結果を表示"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ New: MCP search_tools Meta-Tool</b>", "<b>★ 新機能: MCP search_tools メタツール</b>"), itemStyle);
            GUILayout.Label(L("• Search tools without knowing exact category", "• カテゴリ不明でもキーワード検索可能"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>Improved: HTTP Server Port Recovery</b>", "<b>改善: HTTPサーバーポート復帰</b>"), itemStyle);
            GUILayout.Label(L("• Force kill process blocking port on startup", "• 起動時にポートをブロックするプロセスを強制終了"), itemStyle);
            GUILayout.Label(L("• No more 'port already in use' errors", "• 「ポート使用中」エラーが発生しなくなりました"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>Fix: MeshRenderer Material Assignment</b>", "<b>修正: MeshRendererマテリアル設定</b>"), itemStyle);
            GUILayout.Label(L("• Fixed circular reference error (Color.linear)", "• 循環参照エラー(Color.linear)を修正"), itemStyle);
            GUILayout.Label(L("• Material/Texture now serialize correctly", "• Material/Textureが正常にシリアライズ"), itemStyle);

            GUILayout.Space(5);
            GUILayout.Label(L("<b>★ New: Console Log Filtering</b>", "<b>★ 新機能: コンソールログフィルタリング</b>"), itemStyle);
            GUILayout.Label(L("• excludeSynaptic: Auto-filter internal logs (default: true)", "• excludeSynaptic: 内部ログ自動除外 (デフォルト: true)"), itemStyle);
            GUILayout.Label(L("• filter/exclude: Custom include/exclude patterns", "• filter/exclude: カスタムパターンで絞り込み"), itemStyle);
            GUILayout.Label(L("• groupByMessage: Deduplicate with count", "• groupByMessage: 重複ログを件数表示でまとめる"), itemStyle);
            GUILayout.Label(L("• Reduces token usage significantly", "• トークン消費を大幅削減"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.7
            GUILayout.Label(L("v1.2.7 - Windows Domain Reload Fix", "v1.2.7 - Windowsドメインリロード修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ Critical Fix: Domain Reload Recovery (Windows)</b>", "<b>★ 重要修正: ドメインリロード復帰 (Windows)</b>"), itemStyle);
            GUILayout.Label(L("• Fixed HTTP server not recovering after script recompilation", "• スクリプトリコンパイル後にHTTPサーバーが復帰しない問題を修正"), itemStyle);
            GUILayout.Label(L("• Added ForceReleasePort() before assembly reload", "• アセンブリリロード前にForceReleasePort()を追加"), itemStyle);
            GUILayout.Label(L("• GC.Collect() ensures port is properly released", "• GC.Collect()でポートを確実に解放"), itemStyle);
            GUILayout.Label(L("• Thread.Join(500) for graceful thread termination", "• Thread.Join(500)でスレッドを適切に終了"), itemStyle);
            GUILayout.Label(L("• Increased retry attempts (15x) and delay (1s)", "• リトライ回数(15回)と間隔(1秒)を増加"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.6
            GUILayout.Label(L("v1.2.6 - HTTP Server Stability", "v1.2.6 - HTTPサーバー安定性向上"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>Port Release & Binding Improvements</b>", "<b>ポート解放・バインディング改善</b>"), itemStyle);
            GUILayout.Label(L("• Added Abort() on Stop for immediate port release", "• Stop時にAbort()追加で即座にポート解放"), itemStyle);
            GUILayout.Label(L("• Added retry logic for TIME_WAIT state (Windows)", "• TIME_WAIT状態へのリトライ処理追加(Windows)"), itemStyle);
            GUILayout.Label(L("• Up to 5 retries with 500ms delay", "• 最大5回リトライ、500ms間隔"), itemStyle);
            GUILayout.Label(L("• Prevents 'port already in use' errors", "• 「ポートが使用中」エラーを防止"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.5
            GUILayout.Label(L("v1.2.5 - VFX Graph Fixes & HTTP Prompt API", "v1.2.5 - VFX Graph修正 & HTTPプロンプトAPI"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ New: HTTP Prompt Endpoint</b>", "<b>★ 新機能: HTTPプロンプトエンドポイント</b>"), itemStyle);
            GUILayout.Label(L("• GET /prompt - Fetch AI control prompt directly", "• GET /prompt - AIプロンプトを直接取得可能"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>★ New: Test Runner Auto-Execution</b>", "<b>★ 新機能: テストランナー自動実行</b>"), itemStyle);
            GUILayout.Label(L("• unity_run_tests now executes tests automatically", "• unity_run_testsがテストを自動実行"), itemStyle);
            GUILayout.Label(L("• operation: run, results, list", "• operation: run, results, list"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>VFX Graph Fixes</b>", "<b>VFX Graph修正</b>"), itemStyle);
            GUILayout.Label(L("• Fixed add_context, add_parameter, add_block", "• add_context, add_parameter, add_blockを修正"), itemStyle);
            GUILayout.Label(L("• Fixed set_attribute 'Ambiguous match' error", "• set_attributeの'Ambiguous match'エラー修正"), itemStyle);
            GUILayout.Label(L("• Improved reflection handling for Unity 2022.3+", "• Unity 2022.3+のリフレクション処理改善"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>Other Fixes</b>", "<b>その他の修正</b>"), itemStyle);
            GUILayout.Label(L("• HTTP server: Play mode transition stability", "• HTTPサーバー: Playモード切替時の安定性向上"), itemStyle);
            GUILayout.Label(L("• Animator window now updates after script changes", "• スクリプト変更後にAnimatorウィンドウが更新"), itemStyle);
            GUILayout.Label(L("• Reduced MCP connection log noise", "• MCP接続ログのノイズ削減"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.4
            GUILayout.Label(L("v1.2.4 - Dynamic Meta-Tools & Critical Fix", "v1.2.4 - 動的メタツール & 重要修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ New: Dynamic Meta-Tools</b>", "<b>★ 新機能: 動的メタツール</b>"), itemStyle);
            GUILayout.Label(L("• unity_dynamic_inspect - Inspect any component", "• unity_dynamic_inspect - 任意コンポーネントの検査"), itemStyle);
            GUILayout.Label(L("• unity_dynamic_modify - Modify any property", "• unity_dynamic_modify - 任意プロパティの変更"), itemStyle);
            GUILayout.Label(L("• unity_dynamic_create - Create objects/prefabs", "• unity_dynamic_create - オブジェクト/プレハブ作成"), itemStyle);
            GUILayout.Label(L("• Available as inspect/modify/create in SuperSave", "• SuperSaveでinspect/modify/createとして利用可"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>Critical Fix</b>", "<b>重要な修正</b>"), itemStyle);
            GUILayout.Label(L("• Fixed prefabs contaminating scene analysis", "• シーン分析にプレハブが混入する問題を修正"), itemStyle);
            GUILayout.Label(L("• analyze_draw_calls now returns only scene objects", "• analyze_draw_callsがシーン内オブジェクトのみ返す"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>Other Fixes</b>", "<b>その他の修正</b>"), itemStyle);
            GUILayout.Label(L("• HTTP server port cleanup on recompile", "• HTTPサーバーのポート解放問題修正"), itemStyle);
            GUILayout.Label(L("• Script creation path parameter added", "• スクリプト作成のpath引数追加"), itemStyle);
            GUILayout.Label(L("• Windows Node.js path detection improved", "• Windows Node.jsパス検出改善"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.3
            GUILayout.Label(L("v1.2.3 - HTTP API Fix", "v1.2.3 - HTTP API修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);
            GUILayout.Label(L("<b>Fixed</b>", "<b>修正</b>"), itemStyle);
            GUILayout.Label(L("• HTTP API: All tools now work via /execute, /batch", "• HTTP API: 全ツールが/execute, /batchで動作"), itemStyle);
            GUILayout.Label(L("• Fixed 'Unknown operation' error for unmapped tools", "• マッピングなしツールの'Unknown operation'エラー修正"), itemStyle);
            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.2
            GUILayout.Label(L("v1.2.2 - SuperSave Fixes", "v1.2.2 - SuperSave修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);
            GUILayout.Label(L("<b>Fixed</b>", "<b>修正</b>"), itemStyle);
            GUILayout.Label(L("• SuperSave execute tool now works correctly", "• SuperSaveのexecuteツールが正常に動作"), itemStyle);
            GUILayout.Label(L("• All MCP clients use selected server mode", "• 全MCPクライアントで選択モードを使用"), itemStyle);
            GUILayout.Label(L("• Component details for all types (not null)", "• 全コンポーネントの詳細情報を取得可能"), itemStyle);
            GUILayout.Label(L("• Filter aliases: tag, layer, name accepted", "• フィルタ別名: tag, layer, name対応"), itemStyle);
            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.1
            GUILayout.Label(L("v1.2.1 - Hotfix", "v1.2.1 - 緊急修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);
            GUILayout.Label(L("<b>Fixed</b>", "<b>修正</b>"), itemStyle);
            GUILayout.Label(L("• SuperSave Mode: Added shutdown handlers", "• SuperSave: シャットダウン処理追加"), itemStyle);
            GUILayout.Label(L("• Proper MCP client cleanup on exit", "• MCP終了時の適切なクリーンアップ"), itemStyle);
            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.2.0
            GUILayout.Label(L("v1.2.0 - Token SuperSave Mode", "v1.2.0 - トークン SuperSave モード"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);

            GUILayout.Label(L("<b>★ New: Token SuperSave Mode [Recommended]</b>", "<b>★ 新機能: Token SuperSave モード [推奨]</b>"), itemStyle);
            GUILayout.Label(L("• 99% context reduction with only 3 meta-tools", "• 3つのメタツールで99%のコンテキスト削減"), itemStyle);
            GUILayout.Label(L("• list_categories() - Discover tool categories", "• list_categories() - カテゴリ一覧"), itemStyle);
            GUILayout.Label(L("• list_tools(category) - See tools & parameters", "• list_tools(category) - ツール詳細"), itemStyle);
            GUILayout.Label(L("• execute(tool, params) - Run any of 350+ tools", "• execute(tool, params) - 350+ツール実行"), itemStyle);
            GUILayout.Label(L("• Works with all MCP clients", "• 全MCPクライアント対応"), itemStyle);
            GUILayout.Label(L("• Best for long AI sessions", "• 長いAIセッションに最適"), itemStyle);

            GUILayout.Space(10);

            GUILayout.Label(L("<b>Improvements</b>", "<b>改善</b>"), itemStyle);
            GUILayout.Label(L("• Setup window redesigned with mode selection", "• セットアップ画面をモード選択式に刷新"), itemStyle);
            GUILayout.Label(L("• SuperSave Mode set as default", "• SuperSaveモードをデフォルトに"), itemStyle);
            GUILayout.Label(L("• Better error messages with suggestions", "• エラーメッセージに提案を追加"), itemStyle);
            GUILayout.Label(L("• Tool registry loaded from JSON dynamically", "• ツール定義をJSONから動的読み込み"), itemStyle);

            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.1.9
            GUILayout.Label(L("v1.1.9 - Stability Fixes", "v1.1.9 - 安定性修正"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);
            GUILayout.Label(L("• Batch tool format conversion fix", "• バッチツールのフォーマット変換修正"), itemStyle);
            GUILayout.Label(L("• MCP stdio protocol stability (JSON-RPC)", "• MCP stdio プロトコル安定化"), itemStyle);
            GUILayout.Label(L("• HTTP server localhost binding fix", "• HTTPサーバーのlocalhost接続修正"), itemStyle);
            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // v1.1.8
            GUILayout.Label(L("v1.1.8 - Sphere Skybox", "v1.1.8 - 球体スカイボックス"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginVertical(EditorStyles.helpBox);
            GUILayout.Label(L("• Sphere Skybox: Create skybox from any photo", "• 球体スカイボックス: 写真からスカイボックス生成"), itemStyle);
            GUILayout.Label(L("• Multi-pipeline shader support", "• マルチパイプラインシェーダー対応"), itemStyle);
            GUILayout.Label(L("• MCP server renamed to unity-synaptic", "• MCPサーバー名をunity-synapticに変更"), itemStyle);
            EditorGUILayout.EndVertical();

            GUILayout.Space(15);

            // Links
            GUILayout.Label(L("Links", "リンク"), sectionStyle);
            GUILayout.Space(5);

            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button(L("Documentation", "ドキュメント"), GUILayout.Height(25)))
            {
                Application.OpenURL("https://synaptic-ai.net/docs");
            }
            if (GUILayout.Button("Discord", GUILayout.Height(25)))
            {
                Application.OpenURL("https://discord.gg/MXwHCVWmPe");
            }
            if (GUILayout.Button(L("Website", "ウェブサイト"), GUILayout.Height(25)))
            {
                Application.OpenURL("https://synaptic-ai.net");
            }
            EditorGUILayout.EndHorizontal();
        }

        /// <summary>
        /// Reset the "don't show" preference (for testing)
        /// </summary>
        [MenuItem("Tools/Synaptic Pro/Reset Changelog Preference", false, 101)]
        public static void ResetPreference()
        {
            EditorPrefs.DeleteKey(PREF_KEY_LAST_VERSION);
            EditorPrefs.DeleteKey(PREF_KEY_DONT_SHOW);
            SynLog.Info("[Synaptic] Changelog preference reset. Will show on next startup.");
        }
    }
}