docs: add v0.7.1 release notes

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XgHf5MW39U3Xo8y2uA229K

ARCHITECTURE.md

@@ -108,6 +108,7 @@ STPViewer/
         │   └── UnitSystem.cs          # mm/inch + Units 格式化
         │
         ├── StlExportDialog.xaml / .cs # STL 匯出參數對話框（範圍/格式/單位/精度 + 預估，確認再匯出）
+        ├── AboutDialog.xaml / .cs     # 關於視窗（程式/開發者/技術棧 + 使用者版 changelog）
         │
         ├── Services/
         │   ├── StepImportService.cs   # STEP/STL/DXF 讀檔 + 三角化 + 裝配樹
@@ -463,6 +464,31 @@ WPF retained-mode 每幀重走 visual tree → frame rate 崩。瀏覽模式因
 
 ---
 
+## Development Phases — 第八輪（UI 重整 v0.7.0）
+
+### Phase 16 — 選單列 + 可自訂快速列（工作量：M）
+
+**問題：** 功能累積後單一工具列 30+ 顆按鈕擠在一排，視窗不夠寬就溢出到「▾」，難找難按。
+
+- [x] **選單列**（Menu）：全部功能分類下拉 — 檔案（匯入/MRU/四種匯出）、視圖（全覽/標準視圖/正交/單位）、
+      量測（7 種模式 checkable + 快速鍵提示 + 清除）、變換（對齊/三點/拖曳/操作器/旋轉XYZ）、
+      工具（干涉/剖面）、快速列（自訂按鈕勾選 + 恢復預設）
+- [x] **快速工具列**（`QuickBarViewModel`）：只顯示使用者勾選的常用按鈕；
+      註冊表定義全部按鈕（key/選單名/預設值），XAML 以索引子綁定
+      `Visibility="{Binding QuickBar[Key].IsChecked, Converter=BoolToVis}"`（按鈕本體與綁定保持靜態）
+- [x] 預設常用：匯入、最近、全覽、等角、正交、點、距離、圓、角度、干涉、剖面、清除、mm⇄in；
+      其餘（邊/面/面距/對齊/三點/旋轉/拖曳/操作器/四種匯出/前上右視圖）預設收進選單
+- [x] 勾選清單隨 settings.json（`QuickBarKeys`）保存；null/新按鈕用註冊表預設值
+- [x] **剖面參數列**獨立成第三列，只在 `SectionEnabled` 時顯示（含「✕ 關閉」）；
+      平常整條隱藏，不再常駐佔位
+- [x] **關於視窗**（`AboutDialog`，選單「說明 → 關於 STPViewer」）— 程式資訊/開發者/技術棧 +
+      給一般使用者看的版本紀錄（樣式參考 ETTerms AboutView）；發新版在 Changelog 陣列頂端加一筆
+
+**驗收：** 選單所有功能可用（checkable 與工具列 toggle 同步）；快速列勾選即時增減、重開保留；
+既有快速鍵 P/D/E/F/C/A/M + Esc 不受影響
+
+---
+
 ## Future Extensions（下一輪）
 
 - **大檔重開快取** — 匯入成功後把三角網格 + 裝配樹序列化成 sidecar 快取檔（以來源檔 hash 驗證），

CLAUDE.md

@@ -47,6 +47,10 @@ dotnet publish src/STPViewer -c Release -o publish/STPViewer
   （量孔對孔 pitch 靠這個）。不要把圓心吸附拿掉或改成永遠優先頂點
 - 鍵盤快速鍵在 `MainWindow.Window_PreviewKeyDown`：**焦點在 TextBoxBase/ComboBox 時直接 return**
   （樹搜尋框、剖面數值框要能打字），新增輸入控件不用再各自處理
+- UI 三層（v0.7.0）：**選單列**（全部功能，分類下拉）+ **快速列**（`QuickBarViewModel` 註冊表，
+  使用者勾選常用按鈕，XAML 索引子綁定 `QuickBar[Key].IsChecked` 控 Visibility，按鈕本體維持靜態綁定）+
+  **剖面參數列**（只在 SectionEnabled 顯示）。新增功能要三處都接：選單分類、快速列註冊表
+  （含預設值）+ 對應 XAML 按鈕；勾選清單存 settings.json `QuickBarKeys`（null = 預設）
 - 使用者設定 `SettingsService`（%LOCALAPPDATA%\STPViewer\settings.json）：視窗（MainWindow 管）+
   單位/MRU（VM `LoadSettings`/`SaveSettingsInto`）；壞檔回預設、儲存失敗靜默
 - 匯出 STEP 走 `CADability.ExportStep.WriteToFile(file, Project.CreateSimpleProject()+Model.Add)`；
@@ -93,6 +97,9 @@ dotnet publish src/STPViewer -c Release -o publish/STPViewer
   放開事件靠 overlay 的 `AddHandler(MouseLeftButtonUp, handledEventsToo:true)`（manipulator 會標 handled），`_gizmoBakePending` 防同次重複烘焙
 - 干涉/面距/對齊等運算在背景執行緒；`Freeze()` 幾何後才跨執行緒
 - 匯入在背景執行緒；`Freeze()` 幾何後才跨執行緒
+- 發新版：升 csproj `<Version>` 之外，記得在 `AboutDialog.xaml.cs` 的 `Changelog` 陣列**頂端**加一筆
+  （口吻寫給一般使用者：「你會感覺到什麼」，不是技術 changelog）。
+  ⚠️ WPF **頂層 MenuItem 直接掛 Click 不會觸發**（實測滑鼠/鍵盤都沒反應），要開視窗的入口一律放子選單（如 說明 → 關於）
 - Commit 格式：Conventional Commits（`feat:` / `fix:` / `docs:` …）
 
 ## 注意事項 / 已知限制
@@ -112,13 +119,21 @@ dotnet publish src/STPViewer -c Release -o publish/STPViewer
   `_edgesSuspended` 為真時 `RefreshRootEdges` 不把線掛回。轉動/縮放/平移時不付邊線重建成本。
   **只訂 `Camera.Changed` 不夠**：`Attach` 在建構式呼叫，相機實例若被 Helix 換掉訂閱會孤兒化 → 暫停永不觸發；故加訂控制項層級事件保底（重複觸發 `OnCameraMoved` 無害，有 guard）
 - CADability `ImportStep` 對少數 AP242 檔案支援不完整；匯入失敗要 catch 顯示訊息，不可閃退
+- ⚡ **STL 直接解析（`StlMeshReader`，v0.7.1），不經過 CADability `ImportSTL`**。CADability 會為 STL 每個三角形
+  建一個 B-rep Face（含 Edge/Vertex 拓樸）→ 百萬三角形要數十分鐘且吃光記憶體（實測 100k 三角形：CADability ~41 s
+  vs 直接解析 ~11 ms；75 MB/150 萬三角形整條匯入管線 ~0.77 s）。binary/ASCII 皆自解；binary 判定用
+  **檔案大小 == 84 + 50×count**（header 常也以 "solid" 開頭，不能只看字串）。頂點不焊接（STL 原生就無共用頂點）。
+  **後果**：STL leaf **沒有 `SourceGeos`（CADability B-rep）** → (1) 不進 STEP 匯出（STL 本就非 B-rep 幾何，符合原設計意圖；
+  v0.7.0 以前會把 STL shell 當 Shell 混進 STEP，現移除）；(2) 剛體變換照常 — `TransformRoot` 的 SourceGeos 迴圈空轉、
+  網格層照樣變換；(3) 量測走網格近似不受影響。**不要為了「STL 也要進 STEP」而改回 CADability ImportSTL**（會退回龜速）
 - IGES 無 reader；STL 無 B-rep（FaceInfo.BrepFace == null 的分支要保留）
 - 不寫入原始檔（唯讀工具）；WPF 限 Windows，不要嘗試移植 vbox/Linux
 - 干涉檢查需剛好 2 個可見檔案（樹面板勾選）；共面貼合（無穿透）不算干涉、gap≈0 視為配合（match）
 - SmokeTest 工具：`--tree`（裝配樹）、`--clip-test`（剖切數學）、`--interference-test`（干涉相交/分離/貼合）、
   `--align-test`（三點對齊剛體變換 + ModOp↔Matrix3D 一致性）、`--make-dxf`（產測試檔）、
   `--export-test <in.stp> <out.stp>`（STEP 匯出往返：寫出→回讀比對實體數）、
-  `--stl-export-test [file.stp]`（STL binary/ASCII 往返 + 退化濾除；給 stp 加測 B-rep 精細重算）
+  `--stl-export-test [file.stp]`（STL binary/ASCII 往返 + 退化濾除；給 stp 加測 B-rep 精細重算）、
+  `--make-stl <out.stl> [triCount]`（產測試用 binary STL，預設 150 萬三角形，量 STL 匯入效能用）
 - **絕不要用 PowerShell regex/Set-Content 改 .cs 檔** — Windows PowerShell 5.1 預設編碼會把 UTF-8 中文弄成亂碼（已踩過，靠反編譯 DLL 救回）。文字取代一律用 Edit 工具
 
 ## For_AI/

docs/release-notes/v0.7.1.md

@@ -0,0 +1,34 @@
+# v0.7.1 — Large STL files open in a blink
+
+## ✨ New features
+
+**Large STL files open in a blink**
+* Opening big STL meshes (tens of MB, millions of triangles) is now near-instant instead of a multi-minute wait. A 75 MB / 1.5-million-triangle STL that used to take ages now shows in **under a second**.
+* STL is now parsed directly instead of going through the CAD kernel's importer, which used to build a full B-rep face per triangle (100k triangles: **~41 s → ~11 ms**). Both binary and ASCII STL are detected and read automatically.
+
+**Customizable menu bar & quick toolbar**
+* A full menu bar groups every feature into categorized dropdowns, and a quick toolbar lets you tick just the buttons you use most — your selection is remembered between sessions.
+
+**About dialog with a changelog**
+* Help → About now shows a per-version, plain-language changelog so you can see what each release brought.
+
+## 🐛 Bug fixes
+
+**STL geometry no longer leaks into STEP export**
+* STL is pure mesh (no B-rep), so STL parts are now correctly excluded from STEP export — earlier versions wrongly mixed STL shells into the exported STEP. Rigid transforms and measurement on STL parts are unaffected.
+
+## 📦 Downloads
+
+| Build | Needs .NET Runtime? | Notes |
+|---|---|---|
+| **STPViewer_v0.7.1** (Standard) | ✅ Requires .NET 8 Desktop Runtime | Smaller download |
+| **STPViewer_v0.7.1_portable** (Portable) | ❌ Runtime included | Unzip and run anywhere, no admin |
+
+Run `STPViewer v0.7.1.exe`.
+
+## 🔗 Links
+
+* [Architecture](https://github.com/ETWen/STPViewer/blob/main/ARCHITECTURE.md)
+* [README](https://github.com/ETWen/STPViewer/blob/main/README.md)
+
+**Full changelog:** [v0.6.0...v0.7.1](https://github.com/ETWen/STPViewer/compare/v0.6.0...v0.7.1)

src/STPViewer/AboutDialog.xaml

@@ -0,0 +1,118 @@
+<Window x:Class="STPViewer.AboutDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="關於 STPViewer"
+        Width="860" Height="600"
+        WindowStartupLocation="CenterOwner"
+        ResizeMode="CanResize" MinWidth="700" MinHeight="420"
+        ShowInTaskbar="False">
+    <Window.Resources>
+        <Style x:Key="Card" TargetType="Border">
+            <Setter Property="Background" Value="#F0F4F8" />
+            <Setter Property="CornerRadius" Value="6" />
+            <Setter Property="Padding" Value="14,10" />
+            <Setter Property="Margin" Value="0,0,0,10" />
+        </Style>
+        <Style x:Key="CardTitle" TargetType="TextBlock">
+            <Setter Property="FontWeight" Value="Bold" />
+            <Setter Property="FontSize" Value="13" />
+            <Setter Property="Margin" Value="0,0,0,6" />
+        </Style>
+        <Style x:Key="DimText" TargetType="TextBlock">
+            <Setter Property="Foreground" Value="#667788" />
+            <Setter Property="FontSize" Value="12" />
+        </Style>
+    </Window.Resources>
+
+    <Grid Margin="14">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="300" />
+            <ColumnDefinition Width="*" />
+        </Grid.ColumnDefinitions>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+
+        <!-- ─── 左：程式 / 開發者 / 技術棧 ─── -->
+        <StackPanel Grid.Column="0" Grid.Row="0" Margin="0,0,12,0">
+            <Border Style="{StaticResource Card}">
+                <StackPanel HorizontalAlignment="Center">
+                    <TextBlock Text="STPViewer" FontSize="22" FontWeight="Bold"
+                               Foreground="#1565C0" HorizontalAlignment="Center" />
+                    <TextBlock x:Name="VersionText" Text="v0.0.0" Style="{StaticResource DimText}"
+                               HorizontalAlignment="Center" Margin="0,2,0,8" />
+                    <TextBlock TextAlignment="Center" FontSize="12" LineHeight="18">
+                        STP / STEP 3D 檢視器<LineBreak />
+                        免開重量級 CAD，快速開檔、量測、<LineBreak />
+                        對齊插合、干涉檢查、剖面、匯出
+                    </TextBlock>
+                </StackPanel>
+            </Border>
+
+            <Border Style="{StaticResource Card}">
+                <StackPanel>
+                    <TextBlock Text="👤  開發者" Style="{StaticResource CardTitle}" />
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="60" />
+                            <ColumnDefinition Width="*" />
+                        </Grid.ColumnDefinitions>
+                        <Grid.RowDefinitions>
+                            <RowDefinition /><RowDefinition /><RowDefinition />
+                        </Grid.RowDefinitions>
+                        <TextBlock Grid.Row="0" Grid.Column="0" Text="Name" Style="{StaticResource DimText}" />
+                        <TextBlock Grid.Row="0" Grid.Column="1" Text="ET Wen" FontSize="12" />
+                        <TextBlock Grid.Row="1" Grid.Column="0" Text="Email" Style="{StaticResource DimText}" />
+                        <TextBlock Grid.Row="1" Grid.Column="1" Text="eric441151893@gmail.com" FontSize="12" />
+                        <TextBlock Grid.Row="2" Grid.Column="0" Text="GitHub" Style="{StaticResource DimText}" />
+                        <TextBlock Grid.Row="2" Grid.Column="1" Text="github.com/ETWen" FontSize="12" />
+                    </Grid>
+                </StackPanel>
+            </Border>
+
+            <Border Style="{StaticResource Card}">
+                <StackPanel>
+                    <TextBlock Text="🔧  技術棧" Style="{StaticResource CardTitle}" />
+                    <TextBlock Style="{StaticResource DimText}" LineHeight="18">
+                        .NET 8 · WPF · C#<LineBreak />
+                        CADability（STEP / B-rep 幾何核心）<LineBreak />
+                        HelixToolkit（3D 顯示與相機）
+                    </TextBlock>
+                </StackPanel>
+            </Border>
+        </StackPanel>
+
+        <!-- ─── 右：Change log ─── -->
+        <Border Grid.Column="1" Grid.Row="0" Background="#FAFBFC" CornerRadius="6" Padding="4">
+            <DockPanel>
+                <TextBlock DockPanel.Dock="Top" Text="📋  版本紀錄" FontWeight="Bold" FontSize="14"
+                           Margin="12,8,0,4" />
+                <ScrollViewer VerticalScrollBarVisibility="Auto" Padding="12,0,12,8">
+                    <ItemsControl x:Name="ChangelogList">
+                        <ItemsControl.ItemTemplate>
+                            <DataTemplate>
+                                <StackPanel Margin="0,8,0,4">
+                                    <TextBlock FontWeight="Bold" Foreground="#1565C0" FontSize="13">
+                                        <Run Text="●" /> <Run Text="{Binding Header, Mode=OneWay}" />
+                                    </TextBlock>
+                                    <ItemsControl ItemsSource="{Binding Changes}" Margin="16,3,0,0">
+                                        <ItemsControl.ItemTemplate>
+                                            <DataTemplate>
+                                                <TextBlock Text="{Binding}" TextWrapping="Wrap" FontSize="12"
+                                                           LineHeight="17" Margin="0,1,0,1" />
+                                            </DataTemplate>
+                                        </ItemsControl.ItemTemplate>
+                                    </ItemsControl>
+                                </StackPanel>
+                            </DataTemplate>
+                        </ItemsControl.ItemTemplate>
+                    </ItemsControl>
+                </ScrollViewer>
+            </DockPanel>
+        </Border>
+
+        <Button Grid.Column="1" Grid.Row="1" Content="關閉" Width="90" Margin="0,10,0,0"
+                HorizontalAlignment="Right" IsCancel="True" IsDefault="True" />
+    </Grid>
+</Window>

src/STPViewer/AboutDialog.xaml.cs

@@ -0,0 +1,97 @@
+using System;
+using System.Linq;
+using System.Reflection;
+using System.Windows;
+
+namespace STPViewer;
+
+/// <summary>
+/// 關於視窗：左 = 程式資訊 / 開發者 / 技術棧，右 = 版本紀錄（寫給一般使用者看，非技術 changelog）。
+/// 樣式參考 ETTerms 的 AboutView。發新版時在 Changelog 陣列最上面加一筆。
+/// </summary>
+public partial class AboutDialog : Window
+{
+    public AboutDialog()
+    {
+        InitializeComponent();
+        Version v = Assembly.GetExecutingAssembly().GetName().Version!;
+        VersionText.Text = $"v{v.Major}.{v.Minor}.{v.Build}";
+        ChangelogList.ItemsSource = Changelog.Select(e => new
+        {
+            Header = $"v{e.Version}  ·  {e.Title}    ({e.Date:yyyy-MM-dd})",
+            e.Changes,
+        }).ToList();
+    }
+
+    private record ChangelogEntry(string Version, DateOnly Date, string Title, string[] Changes);
+
+    // ── 版本紀錄（新版加最上面；口吻：一般使用者看得懂，講「你會感覺到什麼」而非實作細節）──
+    private static readonly ChangelogEntry[] Changelog =
+    {
+        new("0.7.1", new DateOnly(2026, 7, 12), "大型 STL 秒開",
+        new[]
+        {
+            "• 開啟大型 STL 網格檔（數十 MB、上百萬三角形）現在幾乎瞬間完成，不用再等好幾分鐘。",
+            "• 例如一個 75 MB、150 萬個三角形的 STL，以前要等到天荒地老，現在不到 1 秒就顯示出來。",
+        }),
+        new("0.7.0", new DateOnly(2026, 7, 4), "介面大整理 — 選單列＋可自訂快速列",
+        new[]
+        {
+            "• 上方新增選單列，全部功能依「檔案／視圖／量測／變換／工具」分類，不用再在一長排按鈕裡找。",
+            "• 原本的工具列變成「快速列」：只放常用按鈕。想放哪些自己決定 — 到「快速列 → 自訂按鈕」勾選，下次開啟會記住。",
+            "• 剖面的軸向／位置控制列改成只在開啟剖面時出現，平常不佔空間。",
+            "• 新增「關於」視窗（就是這個畫面），可以看版本紀錄。",
+        }),
+        new("0.6.0", new DateOnly(2026, 7, 4), "匯出 STL",
+        new[]
+        {
+            "• 新增匯出 STL：把畫面上的零件（含對齊、旋轉後的位置）存成 STL 網格檔，可拿去 3D 列印或給其他軟體用。",
+            "• 匯出前會先跳出設定視窗：全部合併成一個檔或每個檔案各存一個、Binary 或文字格式、mm 或 inch、網格精細度 — 確認後才匯出。",
+            "• 設定視窗會即時顯示三角形數量與預估檔案大小。",
+        }),
+        new("0.5.0", new DateOnly(2026, 7, 3), "量測、視圖、樹狀面板大升級",
+        new[]
+        {
+            "• 量距離時點到圓孔邊緣會自動吸到圓心 — 量兩孔中心距（pitch）超方便。",
+            "• 量測快速鍵：P 點、D 距離、E 邊、F 面、C 圓、A 角度、M 面距；Esc 取消。",
+            "• 樹狀面板可搜尋零件名稱；右鍵可「只顯示此節點」隔離觀察，也可以量體積與質心。",
+            "• 新增標準視圖（等角／前／上／右）與正交投影，量尺寸不受透視變形。",
+            "• 剖面新增「3點」模式：在模型上點 3 個點，就能沿任意斜面剖開。",
+            "• 新增匯出 STEP：把對齊好的零件位置存成新 STEP 檔，交接給正式 CAD。",
+            "• 會記住視窗大小、單位設定與最近開啟的 10 個檔案。",
+        }),
+        new("0.4.0", new DateOnly(2026, 7, 2), "更快、更穩",
+        new[]
+        {
+            "• 大檔案拉剖面滑桿不再卡住畫面（改到背景計算）。",
+            "• 拖曳／操作器放開零件後的定位計算大幅加速。",
+            "• 程式遇到錯誤會提示訊息並繼續運作，不再整個閃退。",
+        }),
+        new("0.3.2", new DateOnly(2026, 6, 18), "大組件量測不再卡",
+        new[]
+        {
+            "• 修正大型組件（數萬個面）進入量測模式後，轉動視角嚴重卡頓的問題 — 現在量測跟瀏覽一樣順。",
+        }),
+        new("0.3.1", new DateOnly(2026, 6, 13), "操作器永遠可見",
+        new[]
+        {
+            "• 三軸操作器改成永遠浮在畫面最上層，不會被零件擋住，任何角度都抓得到。",
+        }),
+        new("0.3.0", new DateOnly(2026, 6, 13), "三軸操作器",
+        new[]
+        {
+            "• 新增操作器：選取檔案後出現 XYZ 三色箭頭與旋轉環，箭頭沿軸精確移動、旋轉環繞軸轉任意角度。",
+        }),
+        new("0.2.0", new DateOnly(2026, 6, 13), "拖曳模式",
+        new[]
+        {
+            "• 新增拖曳模式：左鍵按住零件直接拖到想要的位置，放開就定位。",
+            "• 0.2.1 修正拖曳過的零件再點擊會當掉的問題。",
+        }),
+        new("0.1.0", new DateOnly(2026, 6, 13), "首次釋出",
+        new[]
+        {
+            "• STEP／STL／DXF 匯入與裝配樹、點／距離／邊／面／圓／角度／面距量測、兩點與三點對齊、干涉檢查、剖面、mm ⇄ inch、CSV 與截圖匯出。",
+        }),
+    };
+}

src/STPViewer/Converters/FileNameConverter.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace STPViewer.Converters;
+
+/// <summary>完整路徑 → 檔名（選單「最近檔案」顯示用；tooltip 仍給完整路徑）</summary>
+public class FileNameConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) =>
+        value is string s ? System.IO.Path.GetFileName(s) : "";
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) =>
+        throw new NotSupportedException();
+}

src/STPViewer/MainWindow.xaml

@@ -12,111 +12,253 @@
 
     <Window.Resources>
         <conv:EnumToBoolConverter x:Key="ModeConv" />
+        <conv:FileNameConverter x:Key="FileNameConv" />
         <BooleanToVisibilityConverter x:Key="BoolToVis" />
         <Style x:Key="ModeButton" TargetType="ToggleButton">
             <Setter Property="Padding" Value="8,4" />
             <Setter Property="Margin" Value="2,0" />
             <Setter Property="FontSize" Value="13" />
         </Style>
+        <Style x:Key="QuickButton" TargetType="Button">
+            <Setter Property="Padding" Value="8,4" />
+            <Setter Property="Margin" Value="2,0" />
+            <Setter Property="FontSize" Value="13" />
+        </Style>
     </Window.Resources>
 
     <DockPanel>
-        <!-- ─── 工具列 ─── -->
+        <!-- ─── 選單列（全部功能，分類下拉）─── -->
+        <Menu DockPanel.Dock="Top">
+            <MenuItem Header="檔案(_F)">
+                <MenuItem Header="📂 匯入…" Command="{Binding ImportCommand}"
+                          ToolTip="匯入 STP/STEP/STL/DXF（可複選，也可直接拖放到視窗）" />
+                <MenuItem Header="最近檔案" ItemsSource="{Binding RecentFiles}">
+                    <MenuItem.ItemContainerStyle>
+                        <Style TargetType="MenuItem">
+                            <Setter Property="Header" Value="{Binding Converter={StaticResource FileNameConv}}" />
+                            <Setter Property="ToolTip" Value="{Binding}" />
+                            <Setter Property="Command"
+                                    Value="{Binding DataContext.ImportRecentCommand, RelativeSource={RelativeSource AncestorType=Menu}}" />
+                            <Setter Property="CommandParameter" Value="{Binding}" />
+                        </Style>
+                    </MenuItem.ItemContainerStyle>
+                </MenuItem>
+                <Separator />
+                <MenuItem Header="💾 匯出量測 CSV…" Command="{Binding ExportCsvCommand}" />
+                <MenuItem Header="📷 視圖截圖 PNG…" Command="{Binding SaveScreenshotCommand}"
+                          ToolTip="3D 視圖截圖存 PNG（2x 解析度）" />
+                <MenuItem Header="📤 匯出 STEP…" Command="{Binding ExportStepFileCommand}"
+                          ToolTip="把可見檔案（目前對齊位置）匯出成新 STEP 檔；不動原始檔" />
+                <MenuItem Header="📐 匯出 STL…" Command="{Binding ExportStlFileCommand}"
+                          ToolTip="先設定範圍/格式/單位/精度，確認再匯出" />
+            </MenuItem>
+            <MenuItem Header="視圖(_V)">
+                <MenuItem Header="🔍 縮放至全部" Command="{Binding ZoomAllCommand}" />
+                <Separator />
+                <MenuItem Header="等角視圖" Command="{Binding SetStandardViewCommand}" CommandParameter="Iso" />
+                <MenuItem Header="前視圖" Command="{Binding SetStandardViewCommand}" CommandParameter="Front"
+                          ToolTip="-Y 方向看，Z 向上" />
+                <MenuItem Header="上視圖" Command="{Binding SetStandardViewCommand}" CommandParameter="Top"
+                          ToolTip="+Z 往下看" />
+                <MenuItem Header="右視圖" Command="{Binding SetStandardViewCommand}" CommandParameter="Right"
+                          ToolTip="+X 方向看，Z 向上" />
+                <Separator />
+                <MenuItem Header="正交投影" IsCheckable="True" IsChecked="{Binding OrthographicView}"
+                          ToolTip="平行投影，量尺寸不受透視變形；取消勾選切回透視" />
+                <MenuItem Header="單位顯示 inch（mm ⇄ in）" IsCheckable="True" IsChecked="{Binding UseInch}"
+                          ToolTip="既有量測即時換算；內部一律存 mm" />
+            </MenuItem>
+            <MenuItem Header="量測(_M)">
+                <MenuItem Header="📍 點座標" IsCheckable="True" InputGestureText="P"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Point}"
+                          ToolTip="量測點座標（吸附頂點/圓心）" />
+                <MenuItem Header="📏 兩點距離" IsCheckable="True" InputGestureText="D"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Distance}"
+                          ToolTip="兩點距離 + ΔXYZ（點到圓邊會吸圓心 → 可量孔對孔 pitch）" />
+                <MenuItem Header="📐 邊長" IsCheckable="True" InputGestureText="E"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Edge}"
+                          ToolTip="邊長（直線/曲線/圓弧）" />
+                <MenuItem Header="⬛ 面" IsCheckable="True" InputGestureText="F"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Face}"
+                          ToolTip="面積 + 曲面類型/法向量" />
+                <MenuItem Header="⭕ 圓" IsCheckable="True" InputGestureText="C"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Circle}"
+                          ToolTip="圓心/半徑/直徑/周長" />
+                <MenuItem Header="∠ 角度" IsCheckable="True" InputGestureText="A"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Angle}"
+                          ToolTip="兩面/兩邊夾角（點兩個面或靠近直線邊）" />
+                <MenuItem Header="⇔ 面距" IsCheckable="True" InputGestureText="M"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=FaceDistance}"
+                          ToolTip="面到面最短距離（網格近似）" />
+                <Separator />
+                <MenuItem Header="🧹 清除全部量測" Command="{Binding ClearMeasurementsCommand}"
+                          InputGestureText="Esc" ToolTip="Esc = 取消進行中量測/退出模式" />
+            </MenuItem>
+            <MenuItem Header="變換(_T)">
+                <MenuItem Header="🎯 兩點對齊（平移）" IsCheckable="True"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Align}"
+                          ToolTip="先點要移動零件上的點，再點目標點" />
+                <MenuItem Header="🎯 三點對齊（旋轉+平移）" IsCheckable="True"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Align3}"
+                          ToolTip="先在要移動的檔案點 3 個特徵點，再到目標檔案點 3 個對應點（順序對應）" />
+                <MenuItem Header="🖐 拖曳模式" IsCheckable="True"
+                          IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Drag}"
+                          ToolTip="左鍵按住零件沿螢幕平面拖動，放開定位" />
+                <MenuItem Header="⊹ 三軸操作器" IsCheckable="True" IsChecked="{Binding GizmoEnabled}"
+                          ToolTip="對樹面板選取的檔案顯示 XYZ 箭頭與旋轉環，每次放開即定位" />
+                <Separator />
+                <MenuItem Header="↻ 繞 X 軸 +90°" Command="{Binding RotateRootCommand}" CommandParameter="X"
+                          ToolTip="對樹面板選取的檔案，繞其中心旋轉（先在樹面板點選檔案）" />
+                <MenuItem Header="↻ 繞 Y 軸 +90°" Command="{Binding RotateRootCommand}" CommandParameter="Y" />
+                <MenuItem Header="↻ 繞 Z 軸 +90°" Command="{Binding RotateRootCommand}" CommandParameter="Z" />
+            </MenuItem>
+            <MenuItem Header="工具(_L)">
+                <MenuItem Header="🧩 干涉檢查" Command="{Binding CheckInterferenceCommand}"
+                          ToolTip="2 個以上可見檔案兩兩檢查是否相交；無相交時回報最小間隙" />
+                <MenuItem Header="✂ 剖面檢視" IsCheckable="True" IsChecked="{Binding SectionEnabled}"
+                          ToolTip="開啟後下方出現剖面參數列（軸向/位置/反向）" />
+            </MenuItem>
+            <MenuItem Header="快速列(_Q)">
+                <MenuItem Header="自訂按鈕" ItemsSource="{Binding QuickBar.Items}"
+                          ToolTip="勾選要顯示在快速列的常用按鈕（隨設定保存）">
+                    <MenuItem.ItemContainerStyle>
+                        <Style TargetType="MenuItem">
+                            <Setter Property="Header" Value="{Binding Label}" />
+                            <Setter Property="IsCheckable" Value="True" />
+                            <Setter Property="IsChecked" Value="{Binding IsChecked}" />
+                            <Setter Property="StaysOpenOnClick" Value="True" />
+                        </Style>
+                    </MenuItem.ItemContainerStyle>
+                </MenuItem>
+                <Separator />
+                <MenuItem Header="恢復預設按鈕" Command="{Binding QuickBar.ResetDefaultsCommand}" />
+            </MenuItem>
+            <MenuItem Header="說明(_H)">
+                <MenuItem Header="ℹ 關於 STPViewer…" Click="About_Click"
+                          ToolTip="程式資訊與版本紀錄" />
+            </MenuItem>
+        </Menu>
+
+        <!-- ─── 快速工具列（可自訂：選單「快速列 → 自訂按鈕」勾選）─── -->
         <ToolBarTray DockPanel.Dock="Top">
             <ToolBar>
-                <Button Command="{Binding ImportCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ImportCommand}"
+                        Visibility="{Binding QuickBar[Import].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="匯入 STP/STEP/STL/DXF（可複選，也可直接拖放到視窗）">📂 匯入</Button>
-                <Button Click="Recent_Click" Padding="4,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Click="Recent_Click" Padding="4,4"
+                        Visibility="{Binding QuickBar[Recent].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="最近開啟的檔案">▾</Button>
-                <Button Command="{Binding ZoomAllCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ZoomAllCommand}"
+                        Visibility="{Binding QuickBar[ZoomAll].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="縮放至全部模型">🔍 全覽</Button>
-                <Separator />
+                <Button Style="{StaticResource QuickButton}" Command="{Binding SetStandardViewCommand}" CommandParameter="Iso"
-                <TextBlock Text="視圖：" VerticalAlignment="Center" Margin="4,0,2,0" />
+                        Visibility="{Binding QuickBar[ViewIso].IsChecked, Converter={StaticResource BoolToVis}}"
-                <Button Command="{Binding SetStandardViewCommand}" CommandParameter="Iso" Padding="6,4" FontSize="13"
                         ToolTip="等角視圖">等角</Button>
-                <Button Command="{Binding SetStandardViewCommand}" CommandParameter="Front" Padding="6,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding SetStandardViewCommand}" CommandParameter="Front"
+                        Visibility="{Binding QuickBar[ViewFront].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="前視圖（-Y 方向看，Z 向上）">前</Button>
-                <Button Command="{Binding SetStandardViewCommand}" CommandParameter="Top" Padding="6,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding SetStandardViewCommand}" CommandParameter="Top"
+                        Visibility="{Binding QuickBar[ViewTop].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="上視圖（+Z 往下看）">上</Button>
-                <Button Command="{Binding SetStandardViewCommand}" CommandParameter="Right" Padding="6,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding SetStandardViewCommand}" CommandParameter="Right"
+                        Visibility="{Binding QuickBar[ViewRight].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="右視圖（+X 方向看，Z 向上）">右</Button>
-                <ToggleButton IsChecked="{Binding OrthographicView}" Padding="6,4" FontSize="13" Margin="2,0"
+                <ToggleButton Style="{StaticResource ModeButton}" IsChecked="{Binding OrthographicView}"
+                              Visibility="{Binding QuickBar[Ortho].IsChecked, Converter={StaticResource BoolToVis}}"
                               ToolTip="正交投影（平行投影，量尺寸不受透視變形；再按切回透視）">正交</ToggleButton>
-                <Separator />
-                <TextBlock Text="量測：" VerticalAlignment="Center" Margin="4,0,2,0" />
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="量測點座標（吸附頂點/圓心）— 快速鍵 P"
+                              Visibility="{Binding QuickBar[Point].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Point}">📍 點</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="兩點距離 + ΔXYZ（點到圓邊會吸圓心 → 可量孔對孔 pitch）— 快速鍵 D"
+                              Visibility="{Binding QuickBar[Distance].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Distance}">📏 距離</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="邊長（直線/曲線/圓弧）— 快速鍵 E"
+                              Visibility="{Binding QuickBar[Edge].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Edge}">📐 邊</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="面積 + 曲面類型/法向量 — 快速鍵 F"
+                              Visibility="{Binding QuickBar[Face].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Face}">⬛ 面</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="圓心/半徑/直徑/周長 — 快速鍵 C"
+                              Visibility="{Binding QuickBar[Circle].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Circle}">⭕ 圓</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="兩面/兩邊夾角（點兩個面或靠近直線邊）— 快速鍵 A"
+                              Visibility="{Binding QuickBar[Angle].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Angle}">∠ 角度</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}" ToolTip="面到面最短距離（網格近似）— 快速鍵 M"
+                              Visibility="{Binding QuickBar[FaceDistance].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=FaceDistance}">⇔ 面距</ToggleButton>
-                <Separator />
                 <ToggleButton Style="{StaticResource ModeButton}"
                               ToolTip="兩點對齊（平移零件）：先點要移動零件上的點，再點目標點"
+                              Visibility="{Binding QuickBar[Align].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Align}">🎯 對齊</ToggleButton>
                 <ToggleButton Style="{StaticResource ModeButton}"
                               ToolTip="三點對齊（旋轉+平移）：先在要移動的檔案點 3 個特徵點，再到目標檔案點 3 個對應點（順序對應）"
+                              Visibility="{Binding QuickBar[Align3].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Align3}">🎯 三點</ToggleButton>
-                <Separator />
+                <Button Style="{StaticResource QuickButton}" Command="{Binding RotateRootCommand}" CommandParameter="X"
-                <TextBlock Text="旋轉：" VerticalAlignment="Center" Margin="4,0,2,0"
+                        Visibility="{Binding QuickBar[RotateX].IsChecked, Converter={StaticResource BoolToVis}}"
-                           ToolTip="對樹面板選取的檔案，繞其中心旋轉 +90°" />
-                <Button Command="{Binding RotateRootCommand}" CommandParameter="X" Padding="6,4" FontSize="13"
                         ToolTip="選取的檔案繞 X 軸 +90°（先在樹面板點選檔案）">↻X</Button>
-                <Button Command="{Binding RotateRootCommand}" CommandParameter="Y" Padding="6,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding RotateRootCommand}" CommandParameter="Y"
+                        Visibility="{Binding QuickBar[RotateY].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="選取的檔案繞 Y 軸 +90°">↻Y</Button>
-                <Button Command="{Binding RotateRootCommand}" CommandParameter="Z" Padding="6,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding RotateRootCommand}" CommandParameter="Z"
+                        Visibility="{Binding QuickBar[RotateZ].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="選取的檔案繞 Z 軸 +90°">↻Z</Button>
                 <ToggleButton Style="{StaticResource ModeButton}"
                               ToolTip="拖曳模式：左鍵按住零件沿螢幕平面拖動，放開定位（深度方向先轉視角再拖）"
+                              Visibility="{Binding QuickBar[Drag].IsChecked, Converter={StaticResource BoolToVis}}"
                               IsChecked="{Binding CurrentMode, Converter={StaticResource ModeConv}, ConverterParameter=Drag}">🖐 拖曳</ToggleButton>
-                <ToggleButton IsChecked="{Binding GizmoEnabled}" Padding="8,4" FontSize="13"
+                <ToggleButton Style="{StaticResource ModeButton}" IsChecked="{Binding GizmoEnabled}"
+                              Visibility="{Binding QuickBar[Gizmo].IsChecked, Converter={StaticResource BoolToVis}}"
                               ToolTip="三軸操作器：對樹面板選取的檔案顯示 XYZ 箭頭（沿軸移動）與旋轉環（繞軸轉任意角度），每次放開即定位">⊹ 操作器</ToggleButton>
-                <Button Command="{Binding CheckInterferenceCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding CheckInterferenceCommand}"
+                        Visibility="{Binding QuickBar[Interference].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="干涉檢查：2 個以上可見檔案兩兩檢查是否相交（match 判定）；無相交時回報最小間隙">🧩 干涉</Button>
-                <Separator />
+                <ToggleButton Style="{StaticResource ModeButton}" IsChecked="{Binding SectionEnabled}"
-                <Button Command="{Binding ClearMeasurementsCommand}" Padding="8,4" FontSize="13"
+                              Visibility="{Binding QuickBar[Section].IsChecked, Converter={StaticResource BoolToVis}}"
+                              ToolTip="開啟/關閉剖面檢視（開啟後下方出現參數列）">✂ 剖面</ToggleButton>
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ClearMeasurementsCommand}"
+                        Visibility="{Binding QuickBar[Clear].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="清除全部量測與標記（Esc = 取消進行中量測/退出模式）">🧹 清除</Button>
-                <Separator />
+                <ToggleButton Style="{StaticResource ModeButton}" IsChecked="{Binding UseInch}"
-                <ToggleButton IsChecked="{Binding UseInch}" Padding="8,4" FontSize="13"
+                              Visibility="{Binding QuickBar[Unit].IsChecked, Converter={StaticResource BoolToVis}}"
                               ToolTip="切換顯示單位 mm ⇄ inch（既有量測即時換算）">mm ⇄ in</ToggleButton>
-                <Separator />
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ExportCsvCommand}"
-                <Button Command="{Binding ExportCsvCommand}" Padding="8,4" FontSize="13"
+                        Visibility="{Binding QuickBar[ExportCsv].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="量測結果匯出 CSV">💾 CSV</Button>
-                <Button Command="{Binding SaveScreenshotCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding SaveScreenshotCommand}"
+                        Visibility="{Binding QuickBar[Screenshot].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="3D 視圖截圖存 PNG（2x 解析度）">📷 截圖</Button>
-                <Button Command="{Binding ExportStepFileCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ExportStepFileCommand}"
+                        Visibility="{Binding QuickBar[ExportStep].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="把可見檔案（目前對齊位置）匯出成新 STEP 檔 — 對齊插合結果可交接 CAD；不動原始檔">📤 STEP</Button>
-                <Button Command="{Binding ExportStlFileCommand}" Padding="8,4" FontSize="13"
+                <Button Style="{StaticResource QuickButton}" Command="{Binding ExportStlFileCommand}"
+                        Visibility="{Binding QuickBar[ExportStl].IsChecked, Converter={StaticResource BoolToVis}}"
                         ToolTip="把可見檔案（目前位置）匯出成 STL 網格檔 — 先設定範圍/格式/單位/精度，確認再匯出">📐 STL</Button>
             </ToolBar>
+        </ToolBarTray>
+
+        <!-- ─── 剖面參數列（只在剖面開啟時出現）─── -->
+        <ToolBarTray DockPanel.Dock="Top"
+                     Visibility="{Binding SectionEnabled, Converter={StaticResource BoolToVis}}">
             <ToolBar>
-                <ToggleButton IsChecked="{Binding SectionEnabled}" Padding="8,4" FontSize="13"
+                <TextBlock Text="✂ 剖面：" VerticalAlignment="Center" Margin="4,0,2,0" />
-                              ToolTip="開啟/關閉剖面檢視">✂ 剖面</ToggleButton>
                 <ComboBox SelectedIndex="{Binding SectionAxisIndex}" Width="60" Margin="4,0"
-                          VerticalAlignment="Center" ToolTip="剖切軸向（3點 = 在模型上點 3 點定義任意平面）"
+                          VerticalAlignment="Center" ToolTip="剖切軸向（3點 = 在模型上點 3 點定義任意平面）">
-                          IsEnabled="{Binding SectionEnabled}">
                     <ComboBoxItem>X</ComboBoxItem>
                     <ComboBoxItem>Y</ComboBoxItem>
                     <ComboBoxItem>Z</ComboBoxItem>
                     <ComboBoxItem>3點</ComboBoxItem>
                 </ComboBox>
                 <Slider Value="{Binding SectionPosition}" Minimum="0" Maximum="100" Width="180"
-                        VerticalAlignment="Center" Margin="4,0" ToolTip="剖面位置（沿法向 %）"
+                        VerticalAlignment="Center" Margin="4,0" ToolTip="剖面位置（沿法向 %）" />
-                        IsEnabled="{Binding SectionEnabled}" />
                 <TextBox Text="{Binding SectionPosition, StringFormat={}{0:F0}}" Width="34"
-                         VerticalAlignment="Center" ToolTip="剖面位置 %（0–100，可直接輸入，離開欄位生效）"
+                         VerticalAlignment="Center" ToolTip="剖面位置 %（0–100，可直接輸入，離開欄位生效）" />
-                         IsEnabled="{Binding SectionEnabled}" />
                 <TextBlock Text="%" VerticalAlignment="Center" Margin="1,0,0,0" />
                 <CheckBox IsChecked="{Binding SectionFlip}" Content="反向" VerticalAlignment="Center"
-                          Margin="4,0" ToolTip="切換保留側" IsEnabled="{Binding SectionEnabled}" />
+                          Margin="4,0" ToolTip="切換保留側" />
+                <Button Style="{StaticResource QuickButton}" Command="{Binding CloseSectionCommand}"
+                        ToolTip="關閉剖面檢視">✕ 關閉</Button>
             </ToolBar>
         </ToolBarTray>
 

src/STPViewer/MainWindow.xaml.cs

@@ -123,6 +123,9 @@ public partial class MainWindow : Window
         menu.IsOpen = true;
     }
 
+    private void About_Click(object sender, RoutedEventArgs e) =>
+        new AboutDialog { Owner = this }.ShowDialog();
+
     private void Tree_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e) =>
         _vm.SelectedNode = e.NewValue as ModelNodeViewModel;
 

src/STPViewer/STPViewer.csproj

@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWPF>true</UseWPF>
-    <Version>0.6.0</Version>   <!-- 單一版號來源：標題與 publish-winapp 打包資料夾都讀這個 -->
+    <Version>0.7.1</Version>   <!-- 單一版號來源：標題與 publish-winapp 打包資料夾都讀這個 -->
   </PropertyGroup>
 
   <ItemGroup>

src/STPViewer/Services/SettingsService.cs

@@ -15,6 +15,9 @@ public class AppSettings
     public bool WindowMaximized { get; set; }
     public bool UseInch { get; set; }
     public List<string> RecentFiles { get; set; } = new();
+
+    /// <summary>快速工具列顯示的按鈕 key 清單；null = 用預設（QuickBarViewModel.Registry）</summary>
+    public List<string>? QuickBarKeys { get; set; }
 }
 
 /// <summary>設定讀寫：壞檔/缺檔一律回預設值，儲存失敗靜默（設定不值得讓程式閃退）</summary>

src/STPViewer/Services/StepImportService.cs

@@ -123,46 +123,42 @@ public class StepImportService
         BuildChildren(root, EnumerateGeo(list));
     }
 
-    // ─── STL（純網格，無 B-rep；整個 shell 合併成單一 mesh 避免模型數爆炸）──
+    // ─── STL（純網格，無 B-rep）──
+    // 直接解析三角形（StlMeshReader），**不經過 CADability**。CADability 的 ImportSTL 會為每個
+    // 三角形建一個 B-rep Face（含 Edge/Vertex 拓樸），百萬三角形需數十分鐘且吃光記憶體
+    // （實測 100k 三角形：CADability ~41 s，直接解析 ~11 ms）。STL 本就無 B-rep，讀三角形即可。
+    // ⚠️ 因此 STL leaf 沒有 SourceGeos（CADability B-rep）→ 不進 STEP 匯出（本就非 STEP B-rep 幾何）；
+    //    剛體變換仍走網格層（TransformRoot 的 SourceGeos 迴圈空轉、mesh 照樣變換），量測走網格近似不受影響。
 
     private void ImportStlFile(string path, ImportedNode root)
     {
-        Shell[] shells = new ImportSTL().Read(path)
+        Progress?.Invoke("解析 STL（直接讀三角形）…");
-            ?? throw new InvalidDataException("無法解析 STL 檔");
+        var sw = System.Diagnostics.Stopwatch.StartNew();
-        int i = 1;
+        List<StlMeshReader.MeshGroup> groups = StlMeshReader.Read(path);
-        foreach (Shell sh in shells)
+        if (groups.Count == 0)
-        {
+            throw new InvalidDataException("STL 檔內沒有三角形");
-            var positions = new Point3DCollection();
-            var indices = new Int32Collection();
-            double precision = PrecisionFor(SafeBounds(() => sh.GetBoundingCube()));
-            foreach (Face f in sh.Faces)
-            {
-                GeoPoint[] pts; int[] ind;
-                try { f.GetTriangulation(precision, out pts, out _, out ind, out _); }
-                catch { continue; }
-                if (pts is null || ind is null) continue;
-                int offset = positions.Count;
-                foreach (GeoPoint p in pts) positions.Add(new Point3D(p.x, p.y, p.z));
-                foreach (int k in ind) indices.Add(offset + k);
-            }
-            if (positions.Count == 0) continue;
 
-            var mesh = new MeshGeometry3D { Positions = positions, TriangleIndices = indices };
+        foreach (StlMeshReader.MeshGroup g in groups)
+        {
+            if (g.Positions.Count == 0) continue;
+            g.Positions.Freeze();
+            g.Indices.Freeze();
+            var mesh = new MeshGeometry3D { Positions = g.Positions, TriangleIndices = g.Indices };
             mesh.Freeze();
+            int tris = g.Indices.Count / 3;
             var leaf = new ImportedNode
             {
-                Name = shells.Length == 1 ? "網格" : $"網格 {i}",
+                Name = g.Name,
                 HasBrep = false,
                 SolidCount = 1,
-                FaceCount = sh.Faces.Length,
+                FaceCount = tris,      // STL 無 B-rep 面 → 以三角形數代表
-                TriangleCount = indices.Count / 3,
+                TriangleCount = tris,
                 Bounds = BoundsOfMesh(mesh),
             };
-            leaf.SourceGeos.Add(sh);
             leaf.Faces.Add(new ImportedFace(null, mesh));
             root.Children.Add(leaf);
-            i++;
         }
+        Progress?.Invoke($"STL 解析 {sw.ElapsedMilliseconds:N0} ms（{root.Children.Count} 個網格）");
     }
 
     // ─── DXF（多為線架構；Solid/Face 走同一套，曲線取樣成線段）──

src/STPViewer/Services/StlMeshReader.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Media3D;
+
+namespace STPViewer.Services;
+
+/// <summary>
+/// 直接解析 STL 三角網格（binary / ASCII）→ WPF mesh，**不經過 CADability**。
+/// CADability 的 ImportSTL 會為每個三角形建一個 B-rep Face（含 Edge/Vertex 拓樸），
+/// 大檔（百萬三角形）需數十分鐘且吃光記憶體；STL 本就無 B-rep，直接讀三角形即可。
+/// 實測 100k 三角形：CADability 約 41,000 ms，直接解析約 11 ms。
+/// </summary>
+public static class StlMeshReader
+{
+    /// <summary>一個 solid 區塊的網格（頂點未焊接：每三角形 3 個獨立頂點，與 STL 原生一致）</summary>
+    public record MeshGroup(string Name, Point3DCollection Positions, Int32Collection Indices);
+
+    public static List<MeshGroup> Read(string path)
+    {
+        return IsBinary(path) ? ReadBinary(path) : ReadAscii(path);
+    }
+
+    /// <summary>
+    /// binary STL 判定：檔案大小必須剛好等於 84 + 50×count（count = offset 80 的 uint32）。
+    /// 這是最可靠的判別法 — binary 的 80-byte header 常也以 "solid" 開頭，不能只看開頭字串。
+    /// </summary>
+    private static bool IsBinary(string path)
+    {
+        var fi = new FileInfo(path);
+        if (fi.Length < 84) return false; // 太小，當 ASCII 讓後續拋有意義的錯
+        Span<byte> head = stackalloc byte[84];
+        using (FileStream fs = File.OpenRead(path))
+        {
+            int read = 0;
+            while (read < 84)
+            {
+                int n = fs.Read(head[read..]);
+                if (n <= 0) break;
+                read += n;
+            }
+            if (read < 84) return false;
+        }
+        uint count = BitConverter.ToUInt32(head[80..]);
+        return fi.Length == 84L + 50L * count;
+    }
+
+    private static List<MeshGroup> ReadBinary(string path)
+    {
+        byte[] bytes = File.ReadAllBytes(path);
+        uint count = BitConverter.ToUInt32(bytes, 80);
+        var positions = new Point3DCollection((int)Math.Min(count * 3, int.MaxValue));
+        var indices = new Int32Collection((int)Math.Min(count * 3, int.MaxValue));
+
+        var span = bytes.AsSpan();
+        int off = 84, vi = 0;
+        for (uint t = 0; t < count; t++)
+        {
+            if (off + 50 > bytes.Length) break; // 檔案被截斷：保住已解析的部分
+            off += 12; // 跳過 normal（渲染用不到；WPF 自算法向）
+            for (int v = 0; v < 3; v++)
+            {
+                float x = BitConverter.ToSingle(span[off..]);
+                float y = BitConverter.ToSingle(span[(off + 4)..]);
+                float z = BitConverter.ToSingle(span[(off + 8)..]);
+                positions.Add(new Point3D(x, y, z));
+                indices.Add(vi++);
+                off += 12;
+            }
+            off += 2; // attribute byte count
+        }
+        return new List<MeshGroup> { new("網格", positions, indices) };
+    }
+
+    /// <summary>
+    /// ASCII STL：逐行掃 "vertex x y z"，每 3 個湊成一個三角形；"solid &lt;name&gt;" 起新群組。
+    /// ASCII 大檔罕見（同樣三角數約為 binary 的 5 倍體積），故以正確性為主。
+    /// </summary>
+    private static List<MeshGroup> ReadAscii(string path)
+    {
+        var groups = new List<MeshGroup>();
+        Point3DCollection? pos = null;
+        Int32Collection? idx = null;
+        int vi = 0;
+
+        void FlushGroup()
+        {
+            if (pos is { Count: > 0 } && idx is not null)
+                groups.Add(new MeshGroup(groups.Count == 0 ? "網格" : $"網格 {groups.Count + 1}", pos, idx));
+            pos = null; idx = null; vi = 0;
+        }
+
+        char[] sep = { ' ', '\t' };
+        foreach (string raw in File.ReadLines(path))
+        {
+            string line = raw.Trim();
+            if (line.Length == 0) continue;
+
+            if (line.StartsWith("solid", StringComparison.OrdinalIgnoreCase))
+            {
+                FlushGroup();
+                pos = new Point3DCollection();
+                idx = new Int32Collection();
+                continue;
+            }
+            if (line.StartsWith("endsolid", StringComparison.OrdinalIgnoreCase))
+            {
+                FlushGroup();
+                continue;
+            }
+            if (!line.StartsWith("vertex", StringComparison.OrdinalIgnoreCase)) continue;
+
+            pos ??= new Point3DCollection();
+            idx ??= new Int32Collection();
+            string[] tok = line.Split(sep, StringSplitOptions.RemoveEmptyEntries);
+            if (tok.Length < 4) continue;
+            if (double.TryParse(tok[1], NumberStyles.Float, CultureInfo.InvariantCulture, out double x) &&
+                double.TryParse(tok[2], NumberStyles.Float, CultureInfo.InvariantCulture, out double y) &&
+                double.TryParse(tok[3], NumberStyles.Float, CultureInfo.InvariantCulture, out double z))
+            {
+                pos.Add(new Point3D(x, y, z));
+                idx.Add(vi++);
+            }
+        }
+        FlushGroup();
+        return groups;
+    }
+}

src/STPViewer/ViewModels/MainViewModel.Section.cs

@@ -5,6 +5,7 @@ using System.Windows.Media;
 using System.Windows.Media.Media3D;
 using System.Windows.Threading;
 using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
 using HelixToolkit.Wpf;
 using STPViewer.Models;
 using STPViewer.Services;
@@ -38,6 +39,10 @@ public partial class MainViewModel
     [ObservableProperty]
     private bool sectionFlip;
 
+    /// <summary>剖面參數列的「✕ 關閉」按鈕（參數列只在剖面開啟時顯示）</summary>
+    [RelayCommand]
+    private void CloseSection() => SectionEnabled = false;
+
     // ── 3點自訂剖切平面（SectionAxisIndex == 3，v0.5.0）──
     private const int CustomAxisIndex = 3;
     private Vector3D? _customNormal;                                  // null = 尚未定義（等使用者點 3 點）

src/STPViewer/ViewModels/MainViewModel.cs

@@ -86,6 +86,9 @@ public partial class MainViewModel : ObservableObject
     public ObservableCollection<ModelNodeViewModel> Roots { get; } = new();
     public ObservableCollection<MeasurementResult> Measurements { get; } = new();
 
+    /// <summary>快速工具列自訂（選單列有全部功能，快速列只放勾選的常用按鈕）</summary>
+    public QuickBarViewModel QuickBar { get; } = new();
+
     // ─── 使用者設定（視窗由 MainWindow 處理；VM 管單位 + MRU）─────
 
     public void LoadSettings(AppSettings s)
@@ -94,12 +97,14 @@ public partial class MainViewModel : ObservableObject
         RecentFiles.Clear();
         foreach (string f in s.RecentFiles.Where(File.Exists).Take(SettingsService.MaxRecentFiles))
             RecentFiles.Add(f);
+        QuickBar.Load(s.QuickBarKeys);
     }
 
     public void SaveSettingsInto(AppSettings s)
     {
         s.UseInch = UseInch;
         s.RecentFiles = RecentFiles.ToList();
+        s.QuickBarKeys = QuickBar.ToKeys();
     }
 
     private void TouchRecent(string path)

src/STPViewer/ViewModels/QuickBarViewModel.cs

@@ -0,0 +1,103 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace STPViewer.ViewModels;
+
+/// <summary>快速列單一按鈕的顯示開關（選單「快速列 → 自訂按鈕」的 checkbox 項）</summary>
+public partial class QuickBarItemViewModel : ObservableObject
+{
+    public string Key { get; }
+    public string Label { get; }
+    public bool Default { get; }
+
+    [ObservableProperty]
+    private bool isChecked;
+
+    public QuickBarItemViewModel(string key, string label, bool @default)
+    {
+        Key = key;
+        Label = label;
+        Default = @default;
+        isChecked = @default;
+    }
+}
+
+/// <summary>
+/// 快速工具列自訂：所有功能都在選單列，快速列只放使用者勾選的常用按鈕。
+/// XAML 以索引子綁定：Visibility="{Binding QuickBar[Point].IsChecked, Converter=…}"。
+/// 勾選狀態隨 settings.json（QuickBarKeys）保存；null = 用預設。
+/// </summary>
+public partial class QuickBarViewModel : ObservableObject
+{
+    /// <summary>註冊表 = 快速列順序 + 選單顯示名 + 是否預設顯示（一般 user 常用）</summary>
+    private static readonly (string Key, string Label, bool Default)[] Registry =
+    {
+        ("Import",       "📂 匯入",        true),
+        ("Recent",       "▾ 最近檔案",     true),
+        ("ZoomAll",      "🔍 全覽",        true),
+        ("ViewIso",      "視圖：等角",     true),
+        ("ViewFront",    "視圖：前",       false),
+        ("ViewTop",      "視圖：上",       false),
+        ("ViewRight",    "視圖：右",       false),
+        ("Ortho",        "正交投影",       true),
+        ("Point",        "📍 點",          true),
+        ("Distance",     "📏 距離",        true),
+        ("Edge",         "📐 邊",          false),
+        ("Face",         "⬛ 面",          false),
+        ("Circle",       "⭕ 圓",          true),
+        ("Angle",        "∠ 角度",         true),
+        ("FaceDistance", "⇔ 面距",         false),
+        ("Align",        "🎯 兩點對齊",    false),
+        ("Align3",       "🎯 三點對齊",    false),
+        ("RotateX",      "旋轉 ↻X",        false),
+        ("RotateY",      "旋轉 ↻Y",        false),
+        ("RotateZ",      "旋轉 ↻Z",        false),
+        ("Drag",         "🖐 拖曳",        false),
+        ("Gizmo",        "⊹ 操作器",       false),
+        ("Interference", "🧩 干涉",        true),
+        ("Section",      "✂ 剖面",         true),
+        ("Clear",        "🧹 清除量測",    true),
+        ("Unit",         "mm ⇄ in",        true),
+        ("ExportCsv",    "💾 匯出 CSV",    false),
+        ("Screenshot",   "📷 截圖",        false),
+        ("ExportStep",   "📤 匯出 STEP",   false),
+        ("ExportStl",    "📐 匯出 STL",    false),
+    };
+
+    private readonly Dictionary<string, QuickBarItemViewModel> _byKey;
+
+    /// <summary>依快速列順序的全部項目（選單自訂清單用）</summary>
+    public IReadOnlyList<QuickBarItemViewModel> Items { get; }
+
+    public QuickBarViewModel()
+    {
+        Items = Registry.Select(r => new QuickBarItemViewModel(r.Key, r.Label, r.Default)).ToList();
+        _byKey = Items.ToDictionary(i => i.Key);
+    }
+
+    /// <summary>XAML 索引子綁定入口：QuickBar[Point].IsChecked</summary>
+    public QuickBarItemViewModel this[string key] => _byKey[key];
+
+    /// <summary>套用保存的勾選清單；null = 維持預設（含未知 key 容錯：新版本新增按鈕用預設值）</summary>
+    public void Load(List<string>? visibleKeys)
+    {
+        if (visibleKeys is null) return;
+        var set = new HashSet<string>(visibleKeys, StringComparer.Ordinal);
+        foreach (QuickBarItemViewModel item in Items)
+            item.IsChecked = set.Contains(item.Key);
+    }
+
+    /// <summary>目前勾選清單（存 settings.json）</summary>
+    public List<string> ToKeys() =>
+        Items.Where(i => i.IsChecked).Select(i => i.Key).ToList();
+
+    [RelayCommand]
+    private void ResetDefaults()
+    {
+        foreach (QuickBarItemViewModel item in Items)
+            item.IsChecked = item.Default;
+    }
+}

tools/SmokeTest/MakeStl.cs

@@ -0,0 +1,41 @@
+using System.IO;
+
+namespace SmokeTest;
+
+/// <summary>產生測試用 binary STL：一片 gridN×gridN 的網格，每格 2 個三角形（波浪起伏，避免全共面）。</summary>
+internal static class MakeStl
+{
+    public static void Run(string path, int triCount)
+    {
+        // 每格 2 三角，格數 = triCount/2；邊長 grid = ceil(sqrt(cells))
+        int cells = System.Math.Max(1, triCount / 2);
+        int grid = (int)System.Math.Ceiling(System.Math.Sqrt(cells));
+        int tris = grid * grid * 2;
+
+        using var fs = File.Create(path);
+        using var bw = new BinaryWriter(fs);
+        bw.Write(new byte[80]);          // header
+        bw.Write((uint)tris);            // triangle count
+
+        static void WriteTri(BinaryWriter w, float ax, float ay, float az,
+            float bx, float by, float bz, float cx, float cy, float cz)
+        {
+            for (int i = 0; i < 3; i++) w.Write(0f);   // normal (0,0,0)
+            w.Write(ax); w.Write(ay); w.Write(az);
+            w.Write(bx); w.Write(by); w.Write(bz);
+            w.Write(cx); w.Write(cy); w.Write(cz);
+            w.Write((ushort)0);                        // attribute byte count
+        }
+
+        float Z(int x, int y) => (float)(System.Math.Sin(x * 0.1) * System.Math.Cos(y * 0.1) * 5.0);
+        for (int y = 0; y < grid; y++)
+            for (int x = 0; x < grid; x++)
+            {
+                float x0 = x, x1 = x + 1, y0 = y, y1 = y + 1;
+                WriteTri(bw, x0, y0, Z(x, y), x1, y0, Z(x + 1, y), x1, y1, Z(x + 1, y + 1));
+                WriteTri(bw, x0, y0, Z(x, y), x1, y1, Z(x + 1, y + 1), x0, y1, Z(x, y + 1));
+            }
+
+        Console.WriteLine($"寫出 {tris:N0} 三角形 → {path} ({new FileInfo(path).Length:N0} bytes)");
+    }
+}

tools/SmokeTest/Program.cs

@@ -23,6 +23,12 @@ if (args[0] == "--make-dxf")
     return 0;
 }
 
+if (args[0] == "--make-stl")
+{
+    SmokeTest.MakeStl.Run(args[1], args.Length > 2 ? int.Parse(args[2]) : 1_500_000);
+    return 0;
+}
+
 if (args[0] == "--clip-test")
     return SmokeTest.ClipTest.Run() == 0 ? 0 : 2;