fix(terminal): stop minimize/switch from freezing ConPTY; add Shift+Enter newline (v0.2.2)

OnSizeChanged now ignores degenerate sizes (minimized / smaller than one cell), so ConPTY no longer receives a 1x1 size that collapsed full-screen TUIs like Kiro CLI. ScreenBuffer.Resize reflows both the live and saved alt-screen buffers instead of discarding the main-screen backup. TerminalInput.Map sends LF for Shift+Enter (CR for plain Enter) so the shell inserts a newline for multi-line input. Bump version to 0.2.2 and add About changelog entry.

src/ETTerms/App/AboutView.cs

@@ -177,6 +177,11 @@ public sealed class AboutView : UserControl
 
     private static readonly ChangelogEntry[] Changelog =
     [
+        new("0.2.2", new DateOnly(2026, 6, 5), "Bugfix — terminal stability",
+        [
+            "Fixed: the terminal no longer freezes after minimizing or switching tabs (notably in PowerShell / Kiro).",
+            "Added: Shift+Enter inserts a newline in the shell, so you can type multi-line commands.",
+        ]),
         new("0.2.1", new DateOnly(2026, 6, 4), "AI MCP one-click setup",
         [
             "New Settings → AI MCP tab: register the Serial MCP server into Claude Code or Kiro with one click.",

src/ETTerms/ETTerms.csproj

@@ -10,7 +10,7 @@
     <AssemblyName>ETTerms</AssemblyName>
 
     <!-- 版本資訊 -->
-    <Version>0.2.1</Version>
+    <Version>0.2.2</Version>
     <Product>ETTerms</Product>
     <Company>ETTerms Project</Company>
 

src/ETTerms/Terminal/ScreenBuffer.cs

@@ -270,20 +270,29 @@ public sealed class ScreenBuffer
     {
         cols = Math.Max(1, cols); rows = Math.Max(1, rows);
         if (cols == Cols && rows == Rows) return;
-        var ng = new Cell[rows][];
+        _screen = Reflow(_screen, rows, cols);
-        for (int r = 0; r < rows; r++)
+        // alt screen 啟用中也要一併 reflow 保存的主畫面，否則 resize 後 ExitAlt 會還原失敗、
-        {
+        // 畫面殘留 TUI 內容。不可把 _mainScreen 丟掉。
-            ng[r] = new Cell[cols];
+        if (_mainScreen != null) _mainScreen = Reflow(_mainScreen, rows, cols);
-            for (int c = 0; c < cols; c++)
-                ng[r][c] = (r < Rows && c < Cols) ? _screen[r][c] : BlankDefault();
-        }
-        _screen = ng;
         Rows = rows; Cols = cols;
         _top = 0; _bottom = Rows - 1;
         CursorRow = Math.Clamp(CursorRow, 0, Rows - 1);
         CursorCol = Math.Clamp(CursorCol, 0, Cols - 1);
         _wrapPending = false;
-        _mainScreen = null;
+    }
-        if (AltActive) { /* alt 下 resize：重建 alt 畫面 */ }
+
+    /// <summary>把字格陣列重排到新尺寸，保留左上重疊區，其餘填預設空白。</summary>
+    private Cell[][] Reflow(Cell[][] src, int rows, int cols)
+    {
+        int oldRows = src.Length;
+        var ng = new Cell[rows][];
+        for (int r = 0; r < rows; r++)
+        {
+            ng[r] = new Cell[cols];
+            int oldCols = r < oldRows ? src[r].Length : 0;
+            for (int c = 0; c < cols; c++)
+                ng[r][c] = (c < oldCols) ? src[r][c] : BlankDefault();
+        }
+        return ng;
     }
 }

src/ETTerms/Terminal/TerminalInput.cs

@@ -9,6 +9,11 @@ public static class TerminalInput
 {
     public static byte[]? Map(KeyEventArgs e, bool appCursor)
     {
+        // Enter：一般送 CR(\r) 視為「送出」；Shift+Enter 送 LF(\n)，讓 PSReadLine / Kiro 等
+        // 視為「插入換行」以便輸入多行指令，而不是直接送出。
+        if (e.KeyCode == Keys.Enter)
+            return new[] { (byte)(e.Shift ? '\n' : '\r') };
+
         string? seq = e.KeyCode switch
         {
             Keys.Up => appCursor ? "\x1bOA" : "\x1b[A",
@@ -21,7 +26,6 @@ public static class TerminalInput
             Keys.Delete => "\x1b[3~",
             Keys.PageUp => "\x1b[5~",
             Keys.PageDown => "\x1b[6~",
-            Keys.Enter => "\r",
             Keys.Tab => "\t",
             Keys.Escape => "\x1b",
             Keys.Back => "\x7f",

src/ETTerms/Terminal/TerminalView.cs

@@ -59,6 +59,13 @@ public sealed class TerminalView : UserControl
     protected override void OnSizeChanged(EventArgs e)
     {
         base.OnSizeChanged(e);
+
+        // 視窗最小化、或分頁/分割切換的瞬間，ClientSize 會變成 0/極小。此時若把退化尺寸
+        // （會被算成 1×1）送給 PTY，ConPTY 下的全螢幕 TUI（如 Kiro CLI）會誤以為終端機只剩
+        // 1×1 而停止重繪、輸入也像「卡住」。直接忽略這種尺寸，還原後再以正常尺寸重繪即可。
+        if (ClientSize.Width < _cellW || ClientSize.Height < _cellH) return;
+        if (FindForm() is { WindowState: FormWindowState.Minimized }) return;
+
         int cols = VisibleCols, rows = VisibleRows;
         if (cols == _lastCols && rows == _lastRows) return;
         _lastCols = cols; _lastRows = rows;