feat: make AI Assistant a tileable workspace pane (not a rail view)

Open it from the toolbar (✨ AI Chat) and lay it out next to a Serial
session with Layout (1×2, 2×2…) — chat on one side, watch the terminal
on the other, like Claude Code / Kiro. Previously it was a full-page
Activity Rail view that couldn't sit beside a live session.

WorkspaceView.Session is now abstracted to hold either a SessionPage or
an AiChatView via a Content property; group/log/script actions skip AI
panes. Removed the standalone Ai rail view; Settings → AI Assistant
(provider config) is unchanged.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ARCHITECTURE.md

@@ -476,7 +476,7 @@ Kiro/Claude CLI ── 啟動子行程 ETTerms.PduMcp（stdio / JSON-RPC）
 
 ### 內建 AI Assistant（Phase 10 — ✅ 已完成 v0.6.0）
 
-> 讓 ETTerms **自己就是 agent host**——不經 Claude / Kiro,在 GUI 內建 AI 聊天檢視（Activity Rail 的 ✨ view）,用自然語言驅動 serial 與 PDU（「接上 COM3,送 help 看回應」「連上 PDU,把 outlet 3 重開」一句話完成）。
+> 讓 ETTerms **自己就是 agent host**——不經 Claude / Kiro,在 GUI 內建 AI 聊天**分頁**,用自然語言驅動 serial 與 PDU（「接上 COM3,送 help 看回應」「連上 PDU,把 outlet 3 重開」一句話完成）。**AI 分頁是 Workspace 的一種 pane**（工具列 `✨ AI Chat` 開啟）,可用 Layout（1×2 / 2×2…）與 serial 分頁**並排同時使用**——像 Claude Code / Kiro 那樣一邊聊、一邊看終端機。
 
 **設計原則：BYO Endpoint（使用者自帶 LLM 端點）**
 
@@ -488,7 +488,7 @@ Kiro/Claude CLI ── 啟動子行程 ETTerms.PduMcp（stdio / JSON-RPC）
 **架構（in-process function calling,不經 MCP）**
 
 ```
-AiChatView（Activity Rail 的 ✨ view，全頁聊天）
+AiChatView（Workspace 的一種 pane，與 SessionPage 並排；工具列 ✨ AI Chat 開啟）
   └─ AgentHost（Ai/AgentHost.cs）：維護對話歷史 + 手寫 agent loop（最多 8 輪工具）
       ├─ OpenAiChatClient（Ai/OpenAiChatClient.cs）：極簡 OpenAI 相容 /chat/completions（非串流）→ 使用者設定的 Base URL
       └─ AiTools（Ai/AiTools.cs）：in-process 直呼,不經子行程 / pipe
@@ -748,11 +748,11 @@ Rename-Item (Join-Path $proot "ETTerms.exe") "ETTerms v$ver.exe"
 **包含：**
 - [x] `AppSettings` 加 `AiBaseUrl` / `AiModel` / `AiSystemPrompt`（預設空白）；API key 存 `CredentialVault`（`ETTerms/AiApiKey`）
 - [x] `App/SettingsView.cs` 加 **AI Assistant** 分頁：Base URL / Model / API Key（密碼框）/ 系統提示詞，Save 寫 settings + Credential Manager；空白＝停用
-- [x] `App/AiChatView.cs`：Activity Rail ✨ view，聊天 UI（角色標色訊息串 + 輸入框 + 工具過程顯示）；`RefreshProvider()` 切入時依最新設定重建 client
+- [x] `App/AiChatView.cs`：聊天 UI（角色標色訊息串 + 輸入框 + 工具過程顯示）；`RefreshProvider()` 開分頁時依最新設定重建 client。**作為 Workspace pane**：`WorkspaceView` 工具列 `✨ AI Chat` → `OpenAiPane()`，`Session` 抽象化容納 `SessionPage` 或 `AiChatView`（`Content` 屬性），可與 serial 用 Layout 並排；AI 分頁無 Group / Log / Script（那些操作自動 skip）
 - [x] `Ai/OpenAiChatClient.cs`：極簡 OpenAI 相容 chat-completions（HttpClient，非串流）
 - [x] `Ai/AgentHost.cs`：手寫 agent loop（tool_calls → 執行 → role=tool 餵回 → 迴圈，上限 8 輪）
 - [x] `Ai/AiTools.cs`：serial（list/attach/write/read，經 `SerialBridge`，`[AI]` echo 沿用）+ PDU（connect/status/set_port/power_cycle，`ETTerms.PduCore`）；破壞性動作經 `ConfirmAsync` 彈框；每筆呼叫寫 AppLogger
-- [x] `ActivityRail` 加 `Ai` view（✨）；`MainForm` 掛載並在切入時 `RefreshProvider()`
+- [x] AI 入口在 `WorkspaceView` 工具列（`✨ AI Chat` 按鈕），開成可並排的 pane（非獨立 rail view）——這樣才能與 serial 分頁同時使用
 - [ ] （延伸，未做）MCP host：讓使用者掛自己的第三方 MCP server（schema concat 進 `AiTools.GetSchemas()`）
 **驗收條件：** ✅ 建置 0 錯誤；未設定 Provider 時 AI 面板停用並提示；`src` grep 無任何私人端點 / key（範例一律 localhost / 假 IP）。實機端到端（接 OpenAI 相容端點跑 serial/PDU 一句話流程、PDU 確認框、`[AI]` 標色、AppLogger 紀錄）待使用者驗收。
 

CLAUDE.md

@@ -10,7 +10,7 @@ ETTerms 是一個 **C# .NET 8 WinForms** 的原生 Windows 終端機工作台，
 
 **進度：** Phase 1–5 ✅、Phase 6 ✅（TTL 引擎 + Group 同步，SSH 待驗收）、Phase 7 ✅（Settings/About）、Phase 8 ✅（PDU + Shell/ConPTY + SFTP + Settings 擴充）、Phase 9 ✅（Serial MCP server：**GUI 持有 COM port，MCP 經本機 named pipe 橋接**，AI 收發的資料即時以 `[AI]` 標色顯示在 GUI）、**Phase 10 ✅（v0.6.0）內建 AI Assistant**（見下）。打包待指示。
 
-**v0.6.0：** **內建 AI Assistant（Phase 10）** — 不經 Claude / Kiro，GUI 內建 ✨ AI 聊天檢視（Activity Rail），自然語言驅動 serial + PDU。**BYO endpoint**：`Settings → AI Assistant` 填 Base URL / Model / API Key（任意 OpenAI 相容 gateway：本機 Ollama、LiteLLM、公司 gateway、OpenAI…），**預設全空白＝功能停用**；🚫 **發佈版不含任何私人端點**，API key 存 Windows Credential Manager（`ETTerms/AiApiKey`）、Base URL/Model 存 settings.json，程式碼範例一律 `localhost`/假 IP。**架構（in-process，不經 MCP）**：`Ai/OpenAiChatClient`（極簡 OpenAI 相容 `/chat/completions`，HttpClient 非串流）+ `Ai/AgentHost`（手寫 agent loop，tool_calls→執行→role=tool 餵回→迴圈上限 8 輪）+ `Ai/AiTools`（serial list/attach/write/read 經 `SerialBridge`——與 MCP 同一路徑、AI 的 TX 照樣 `[AI]` 標色顯示在終端機；PDU connect/status/set_port/power_cycle 經 `ETTerms.PduCore`）。**安全**：破壞性 PDU 動作（關插座 / power-cycle）一律 `AiTools.ConfirmAsync` → GUI MessageBox（預設 No）確認，AI 不能自己斷電；每筆工具呼叫寫 AppLogger（`[AI tool] …`）。**刻意不引入 `Microsoft.Extensions.AI`**（手寫 client+loop，依賴最小、對任意 gateway 相容性自己掌控）。既有 SerialMcp/PduMcp（Settings → AI MCP）**不受影響**，繼續服務外部 AI CLI；兩者是「內建 agent（in-process）vs 外部 AI（MCP 跨行程）」的分工。新增 `src/ETTerms/Ai/`（3 檔）+ `App/AiChatView.cs`，`ActivityRail` 加 `Ai` view，`SettingsView` 加 AI Assistant 分頁，`AppSettings` 加 `AiBaseUrl/AiModel/AiSystemPrompt`。
+**v0.6.0：** **內建 AI Assistant（Phase 10）** — 不經 Claude / Kiro，GUI 內建 ✨ AI 聊天**分頁**，自然語言驅動 serial + PDU。**AI 是 Workspace 的一種 pane**（工具列 `✨ AI Chat` 開啟，`WorkspaceView.Session` 抽象化為可容納 `SessionPage` 或 `AiChatView` 的 `Content`），可用 Layout 與 serial 分頁**並排同時用**（像 Claude/Kiro）；AI 分頁無 Group/Log/Script。**BYO endpoint**：`Settings → AI Assistant` 填 Base URL / Model / API Key（任意 OpenAI 相容 gateway：本機 Ollama、LiteLLM、公司 gateway、OpenAI…），**預設全空白＝功能停用**；🚫 **發佈版不含任何私人端點**，API key 存 Windows Credential Manager（`ETTerms/AiApiKey`）、Base URL/Model 存 settings.json，程式碼範例一律 `localhost`/假 IP。**架構（in-process，不經 MCP）**：`Ai/OpenAiChatClient`（極簡 OpenAI 相容 `/chat/completions`，HttpClient 非串流）+ `Ai/AgentHost`（手寫 agent loop，tool_calls→執行→role=tool 餵回→迴圈上限 8 輪）+ `Ai/AiTools`（serial list/attach/write/read 經 `SerialBridge`——與 MCP 同一路徑、AI 的 TX 照樣 `[AI]` 標色顯示在終端機；PDU connect/status/set_port/power_cycle 經 `ETTerms.PduCore`）。**安全**：破壞性 PDU 動作（關插座 / power-cycle）一律 `AiTools.ConfirmAsync` → GUI MessageBox（預設 No）確認，AI 不能自己斷電；每筆工具呼叫寫 AppLogger（`[AI tool] …`）。**刻意不引入 `Microsoft.Extensions.AI`**（手寫 client+loop，依賴最小、對任意 gateway 相容性自己掌控）。既有 SerialMcp/PduMcp（Settings → AI MCP）**不受影響**，繼續服務外部 AI CLI；兩者是「內建 agent（in-process）vs 外部 AI（MCP 跨行程）」的分工。新增 `src/ETTerms/Ai/`（3 檔）+ `App/AiChatView.cs`，`ActivityRail` 加 `Ai` view，`SettingsView` 加 AI Assistant 分頁，`AppSettings` 加 `AiBaseUrl/AiModel/AiSystemPrompt`。
 
 **v0.5.0：** 搜尋 / 關鍵字警示 / TTL 大擴充。**(1) Ctrl+F scrollback 搜尋** — `TerminalView` 內建搜尋列（Enter 往上找、Shift+Enter 往下、F3/Esc），全部命中黃底、目前命中橘底；命中以「絕對行號 = `ScreenBuffer.DroppedLines` + abs」錨定，環形緩衝丟舊行不漂移。**(2) 關鍵字高亮 + 分頁警示** — `AppSettings.KeywordRules`（`KeywordRule{Text,Enabled}` + 全域開關），Settings 新 **Highlight** 分頁可增刪/勾選；`TerminalView` 每次重繪只掃可見行標紅底（不分大小寫），`Feed` 路徑用獨立 Decoder+去 ANSI 偵測觸發 `KeywordAlert`（每關鍵字 2s 冷卻）→ `SessionPage` → `WorkspaceView` 把**非 active 分頁**的圓點標紅、切過去自動清除。**(3) TTL 對齊 TeraTerm** — 新 `TtlExpression` 運算式解析器（括號/邏輯/比較/十六進位 `0x`/`$`，失敗退回 legacy 規則相容舊腳本）；新增控制流 `goto/call(行內執行，迴圈內可用)/return/for-next/do-loop/until-enduntil/break/continue/end/exit/include/mpause`、等待 `waitln/waitregex/recvln/wait 多字串(TeraTerm 語意：逾時 result=0 繼續)/mtimeout`、字串 `strlen/strcompare/strconcat/strcopy/strinsert/strremove/strmatch/strscan/strreplace/strtrim/strsplit/strjoin/tolower/toupper/str2int/int2str/code2str/str2code/sprintf(→inputstr)/expandenv`、檔案 `fileopen/filereadln(result=1 是 EOF)/filewrite(ln)/fileclose/filecreate/filedelete/filesearch/basename/dirname/makepath/foldercreate/folderdelete/foldersearch/getdir/setdir`、雜項 `beep/getdate/gettime(strftime 子集)/getenv/setenv/random/exec/getver/getttdir/uptime/ifdefined/clipb2var/var2clipb/inputbox/yesnobox/crc32/checksum8/16/32/dispstr`、serial 專用 `sendbreak/setbaud/setdtr/setrts/sendfile`（`SerialChannel` 新增對應方法）；單行 `if <expr> <statement>` 支援；`Preprocess` 引號內 `;` 不再被當註解；系統變數 `inputstr/matchstr/groupmatchstr1-9`；`_vars` 改大小寫不敏感；**單字串 `wait` 保留 ETTerms settle+逾時中止語意（勿改）**，多字串才是 TeraTerm 語意。`SessionPage` 把 `runner.Output`（trace：`[wait]`/`>>`/錯誤）以灰色 echo 進終端機，**可由 Settings → Terminal 的 `ShowScriptTrace` 開關關閉**；`dispstr` 走獨立的 `Display` 事件一律顯示。灰色訊息只進畫面 buffer——不進 ⏺ Log 側錄、不進 AI bridge、不送裝置（機台原始 log 乾淨）。指令表＋範例：[docs/ttl-script-reference.md](docs/ttl-script-reference.md)（前段 ETTerms 獨有、後段與 TeraTerm 共有）。
 

src/ETTerms/App/AboutView.cs

@@ -185,7 +185,8 @@ public sealed class AboutView : UserControl
     [
         new("0.6.0", new DateOnly(2026, 7, 5), "Built-in AI Assistant — drive serial & PDU in plain language",
         [
-            "New ✨ AI Assistant view: chat in plain language to send serial commands and control PDU outlets — e.g. \"attach to COM3, send help and show me the reply\" or \"connect to the PDU and power-cycle outlet 3\".",
+            "New ✨ AI Chat: click ✨ AI Chat in the toolbar to open an AI pane, then use Layout (1×2, 2×2…) to sit it right next to a Serial session — chat on one side while you watch the terminal on the other, just like Claude Code / Kiro.",
+            "Talk in plain language to send serial commands and control PDU outlets — e.g. \"attach to COM3, send help and show me the reply\" or \"connect to the PDU and power-cycle outlet 3\".",
             "Bring your own AI endpoint: point it at any OpenAI-compatible server (a local Ollama, a LiteLLM gateway, your company's gateway, or OpenAI). Set it up in Settings → AI Assistant; leave it blank and the assistant simply stays off.",
             "Your API key is stored in Windows Credential Manager, never in a settings file — and no endpoint ships inside the app, so a copy you hand to someone else has the assistant disabled by default.",
             "The AI drives your existing open Serial session, and everything it sends shows up in that terminal tagged [AI] so you always see what it did.",

src/ETTerms/App/ActivityRail.cs

@@ -10,7 +10,7 @@ namespace ETTerms.App;
 /// </summary>
 public sealed class ActivityRail : UserControl
 {
-    public enum RailView { Terminal, Ai, Status, Settings, About }
+    public enum RailView { Terminal, Status, Settings, About }
 
     public event EventHandler<RailView>? ViewSelected;
 
@@ -23,7 +23,6 @@ public sealed class ActivityRail : UserControl
     private static readonly (RailView view, string glyph, string tip)[] Items =
     {
         (RailView.Terminal, "▤", "Terminal"),
-        (RailView.Ai, "✨", "AI Assistant"),
         (RailView.Status, "⚡", "Status"),
         (RailView.Settings, "⚙", "Settings"),
         (RailView.About, "ℹ", "About"),

src/ETTerms/App/MainForm.cs

@@ -14,7 +14,6 @@ public partial class MainForm : Form
     private readonly ActivityRail _rail = new();
     private readonly ConnectionSidebar _sidebar = new();
     private readonly WorkspaceView _workspace = new();
-    private readonly AiChatView _aiView = new();
     private readonly StatusView _statusView = new();
     private readonly SettingsView _settings = new();
     private readonly AboutView _about = new();
@@ -47,14 +46,12 @@ public partial class MainForm : Form
     private void BuildLayout()
     {
         Controls.Add(_workspace);   // Fill
-        Controls.Add(_aiView);      // Fill (hidden)
         Controls.Add(_statusView);  // Fill (hidden)
         Controls.Add(_settings);    // Fill (hidden)
         Controls.Add(_about);       // Fill (hidden)
         Controls.Add(_sidebar);     // Left (內側)
         Controls.Add(_rail);        // Left (最外側)
 
-        _aiView.Visible = false;
         _statusView.Visible = false;
         _settings.Visible = false;
         _about.Visible = false;
@@ -74,11 +71,9 @@ public partial class MainForm : Form
             _statusLabel.Text = $"View: {view}";
             _sidebar.Visible = view == ActivityRail.RailView.Terminal;
             _workspace.Visible = view == ActivityRail.RailView.Terminal;
-            _aiView.Visible = view == ActivityRail.RailView.Ai;
             _statusView.Visible = view == ActivityRail.RailView.Status;
             _settings.Visible = view == ActivityRail.RailView.Settings;
             _about.Visible = view == ActivityRail.RailView.About;
-            if (view == ActivityRail.RailView.Ai) _aiView.RefreshProvider();
             AppLogger.LogInfo($"View selected: {view}");
         };
 

src/ETTerms/App/Workspace/WorkspaceView.cs

@@ -17,7 +17,11 @@ public sealed class WorkspaceView : UserControl
     {
         public required string Title;
         public required bool IsSsh;
-        public required SessionPage Page;
+        public SessionPage? Page;      // 連線分頁（serial/ssh/shell）；AI 分頁時為 null
+        public AiChatView? Ai;         // AI 聊天分頁；連線分頁時為 null
+        public bool IsAi => Ai != null;
+        /// <summary>可塞進格子的內容控制項（SessionPage 或 AiChatView，二擇一）。</summary>
+        public Control Content => (Control?)Page ?? Ai!;
         public Rectangle TabBounds;
         public Rectangle CloseRect;
         public bool Alert;   // 背景分頁出現高亮關鍵字 → 標紅點，切到該分頁時清除
@@ -61,6 +65,17 @@ public sealed class WorkspaceView : UserControl
             Dock = DockStyle.Fill, BackColor = Theme.RailBack,
             Padding = new Padding(8, 6, 8, 6), WrapContents = false
         };
+        // ── ✨ New AI Chat（開一個 AI 分頁,可用 Layout 與 serial 並排）──
+        var aiBtn = MakeActionButton("✨ AI Chat", 92, 0, (_, _) => OpenAiPane());
+        aiBtn.ForeColor = Theme.Accent;
+        aiBtn.FlatAppearance.BorderColor = Theme.Accent;
+        _toolbar.Controls.Add(aiBtn);
+        _toolbar.Controls.Add(new Label
+        {
+            Text = "│", AutoSize = true, ForeColor = Theme.Border,
+            Font = Theme.UiFont, Margin = new Padding(4, 6, 4, 0)
+        });
+
         _toolbar.Controls.Add(new Label
         {
             Text = "Layout", AutoSize = true, ForeColor = Theme.TextDim,
@@ -126,6 +141,17 @@ public sealed class WorkspaceView : UserControl
         Relayout();
     }
 
+    /// <summary>開啟一個 AI Assistant 分頁（跟連線分頁一樣可用 Layout 並排,與 serial 同時使用）。</summary>
+    public void OpenAiPane()
+    {
+        var view = new AiChatView();
+        var s = new Session { Title = "AI Assistant", IsSsh = false, Ai = view };
+        _sessions.Add(s);
+        _active = s;
+        Relayout();
+        view.RefreshProvider();
+    }
+
     private void OnConnectFailed(Session s, string msg)
     {
         if (IsDisposed) return;
@@ -150,17 +176,18 @@ public sealed class WorkspaceView : UserControl
     private void CloseSession(Session s)
     {
         int idx = _sessions.IndexOf(s);
-        s.Page.Parent = null;
+        s.Content.Parent = null;
         _sessions.Remove(s);
-        s.Page.Dispose();
+        s.Content.Dispose();
         if (_active == s) _active = _sessions.Count > 0 ? _sessions[Math.Min(idx, _sessions.Count - 1)] : null;
         RefreshGroupLabels();
         Relayout();
     }
 
-    // ── Group 管理 ───────────────────────────────────────────
+    // ── Group 管理（AI 分頁無 Group）─────────────────────────
     private void SetSessionGroup(Session s, int group)
     {
+        if (s.Page == null) return;
         s.Page.Group = group;
         RefreshGroupLabels();
         Relayout();
@@ -171,17 +198,17 @@ public sealed class WorkspaceView : UserControl
         for (int g = 1; g <= 3; g++)
         {
             char letter = 'A';
-            foreach (var s in _sessions.Where(x => x.Page.Group == g))
+            foreach (var s in _sessions.Where(x => x.Page != null && x.Page.Group == g))
-                s.Page.GroupLabel = $"Group{g}-{letter++}";
+                s.Page!.GroupLabel = $"Group{g}-{letter++}";
         }
-        foreach (var s in _sessions.Where(x => x.Page.Group == 0))
+        foreach (var s in _sessions.Where(x => x.Page != null && x.Page.Group == 0))
-            s.Page.GroupLabel = "";
+            s.Page!.GroupLabel = "";
     }
 
     // ── 依目前 Layout 把分頁鋪進格子 ─────────────────────────
     private void Relayout()
     {
-        foreach (var s in _sessions) s.Page.Parent = null;     // 先卸下（保留存活）
+        foreach (var s in _sessions) s.Content.Parent = null;  // 先卸下（保留存活）
         _body.SuspendLayout();
         for (int i = _body.Controls.Count - 1; i >= 0; i--)
         {
@@ -229,14 +256,16 @@ public sealed class WorkspaceView : UserControl
     private Control MakeCell(Session s, bool withLabel)
     {
         var cell = new Panel { Dock = DockStyle.Fill, BackColor = Theme.WorkspaceBack, Margin = Padding.Empty, Padding = new Padding(1) };
-        s.Page.Dock = DockStyle.Fill;
+        s.Content.Dock = DockStyle.Fill;
-        s.Page.Visible = true;
+        s.Content.Visible = true;
-        cell.Controls.Add(s.Page);                              // Fill 先加
+        cell.Controls.Add(s.Content);                           // Fill 先加
         if (withLabel)
         {
-            string labelText = string.IsNullOrEmpty(s.Page.GroupLabel)
+            string icon = s.IsAi ? "✨" : s.IsSsh ? "🖧" : "🔌";
-                ? $"{(s.IsSsh ? "🖧" : "🔌")}  {s.Title}"
+            string glabel = s.Page?.GroupLabel ?? "";
-                : $"{(s.IsSsh ? "🖧" : "🔌")}  {s.Title}  [{s.Page.GroupLabel}]";
+            string labelText = string.IsNullOrEmpty(glabel)
+                ? $"{icon}  {s.Title}"
+                : $"{icon}  {s.Title}  [{glabel}]";
             var lbl = new Label
             {
                 Dock = DockStyle.Bottom, Height = 22,
@@ -253,8 +282,8 @@ public sealed class WorkspaceView : UserControl
 
     private void FocusActive()
     {
-        if (_active?.Page is { IsDisposed: false } p && p.IsHandleCreated)
+        if (_active?.Content is { IsDisposed: false } c && c.IsHandleCreated)
-            p.Focus();
+            c.Focus();
     }
 
     // ── 頂部 Tab 列 ──────────────────────────────────────────
@@ -276,7 +305,7 @@ public sealed class WorkspaceView : UserControl
         {
             foreach (var s in _sessions)
             {
-                if (s.TabBounds.Contains(e.Location)) { ShowGroupMenu(s, e.Location); return; }
+                if (s.TabBounds.Contains(e.Location)) { if (!s.IsAi) ShowGroupMenu(s, e.Location); return; }
             }
             return;
         }
@@ -303,7 +332,7 @@ public sealed class WorkspaceView : UserControl
         menu.Items.Add("Group 2", null, (_, _) => SetSessionGroup(s, 2));
         menu.Items.Add("Group 3", null, (_, _) => SetSessionGroup(s, 3));
         // Check current
-        int current = s.Page.Group;
+        int current = s.Page?.Group ?? 0;
         ((ToolStripMenuItem)menu.Items[current]).Checked = true;
         menu.Show(_tabStrip, pt);
     }
@@ -368,8 +397,10 @@ public sealed class WorkspaceView : UserControl
             if (drag)
                 using (var pen = new Pen(Theme.Accent, 1))
                     g.DrawRectangle(pen, new Rectangle(s.TabBounds.Left, s.TabBounds.Top, s.TabBounds.Width - 1, s.TabBounds.Height - 1));
-            // 警示中的背景分頁：型別圓點改紅色，切過去看時清除
+            // 警示中的背景分頁：型別圓點改紅色，切過去看時清除。AI 分頁用 accent 紫。
-            using (var dot = new SolidBrush(s.Alert ? Color.FromArgb(235, 85, 85) : s.IsSsh ? Theme.SshColor : Theme.SerialColor))
+            Color dotColor = s.Alert ? Color.FromArgb(235, 85, 85)
+                : s.IsAi ? Theme.Accent : s.IsSsh ? Theme.SshColor : Theme.SerialColor;
+            using (var dot = new SolidBrush(dotColor))
                 g.FillEllipse(dot, s.TabBounds.Left + 9, StripH / 2 - 4, 8, 8);
             var tr = new Rectangle(s.TabBounds.Left + 22, s.TabBounds.Top, s.TabBounds.Width - 22 - CloseSz - 10, StripH);
             TextRenderer.DrawText(g, s.Title, Theme.UiFont, tr, active ? Theme.Text : Theme.TextDim,
@@ -415,19 +446,20 @@ public sealed class WorkspaceView : UserControl
     // ── Log All（一次開/關所有分頁側錄） ──────────────────────
     private void OnToggleLogAll(object? sender, EventArgs e)
     {
-        if (_sessions.Count == 0)
+        var loggable = _sessions.Where(s => s.Page != null).Select(s => s.Page!).ToList();
+        if (loggable.Count == 0)
         {
             MessageBox.Show(this, "No open sessions to log.", "Log All", MessageBoxButtons.OK, MessageBoxIcon.Information);
             return;
         }
 
-        // 只要還有分頁沒在側錄 → 全部開始；否則全部停止。
+        // 只要還有分頁沒在側錄 → 全部開始；否則全部停止。（AI 分頁無側錄）
-        bool startAll = _sessions.Any(s => !s.Page.IsLogging);
+        bool startAll = loggable.Any(p => !p.IsLogging);
         if (startAll)
         {
             int failed = 0;
-            foreach (var s in _sessions)
+            foreach (var p in loggable)
-                if (!s.Page.StartLog()) failed++;
+                if (!p.StartLog()) failed++;
             SetLogAllActive(true);
             if (failed > 0)
                 MessageBox.Show(this, $"{failed} session(s) failed to start logging. See app log for details.",
@@ -435,7 +467,7 @@ public sealed class WorkspaceView : UserControl
         }
         else
         {
-            foreach (var s in _sessions) s.Page.StopLog();
+            foreach (var p in loggable) p.StopLog();
             SetLogAllActive(false);
         }
     }
@@ -451,8 +483,8 @@ public sealed class WorkspaceView : UserControl
     private async void OnRunAllSerial(object? sender, EventArgs e)
     {
         var serials = _sessions
-            .Where(s => !s.IsSsh && s.Page.IsSerial && !s.Page.IsScriptRunning)
+            .Where(s => s.Page != null && !s.IsSsh && s.Page.IsSerial && !s.Page.IsScriptRunning)
-            .Select(s => s.Page)
+            .Select(s => s.Page!)
             .ToList();
 
         if (serials.Count == 0)
@@ -472,8 +504,8 @@ public sealed class WorkspaceView : UserControl
     private async void OnRunGroup(int group)
     {
         var members = _sessions
-            .Where(s => s.Page.Group == group && !s.Page.IsScriptRunning)
+            .Where(s => s.Page != null && s.Page.Group == group && !s.Page.IsScriptRunning)
-            .Select(s => s.Page)
+            .Select(s => s.Page!)
             .ToList();
 
         if (members.Count == 0)
@@ -491,7 +523,7 @@ public sealed class WorkspaceView : UserControl
     protected override void Dispose(bool disposing)
     {
         if (disposing)
-            foreach (var s in _sessions) { try { s.Page.Dispose(); } catch { } }
+            foreach (var s in _sessions) { try { s.Content.Dispose(); } catch { } }
         base.Dispose(disposing);
     }