Add column sorting with direction indicators (▲/▼)

- Click column header to sort ascending, click again to toggle descending
- Sort glyph (▲/▼) appended to sorted column header name
- Numeric-aware sorting (numbers sort by value, not lexicographically)
- Sorting composes with filter (filter applied first, then sort)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: tig

src/Microsoft.PowerShell.ConsoleGuiTools/OutTableViewDataSource.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
@@ -129,6 +130,48 @@ public OutTableViewDataSource Filter(string pattern)
         return new OutTableViewDataSource(_columns, result);
     }
 
+    /// <summary>
+    ///     Creates a new data source with rows sorted by the specified column.
+    ///     The sorted column header is decorated with ▲ (ascending) or ▼ (descending).
+    /// </summary>
+    public OutTableViewDataSource Sort(int columnIndex, bool descending)
+    {
+        if (columnIndex < 0 || columnIndex >= _columns.Count)
+            return this;
+
+        List<DataTableRow> allRows;
+        lock (_lock)
+        {
+            allRows = new List<DataTableRow>(_rows);
+        }
+
+        var columnKey = _columns[columnIndex].ToString();
+
+        var sorted = descending
+            ? allRows.OrderByDescending(r => GetSortValue(r, columnKey))
+            : allRows.OrderBy(r => GetSortValue(r, columnKey));
+
+        var result = new OutTableViewDataSource(_columns, sorted.ToList());
+
+        // Decorate the sorted column header with a direction glyph
+        string glyph = descending ? " ▼" : " ▲";
+        result.ColumnNames[columnIndex] = _columns[columnIndex].Label + glyph;
+
+        return result;
+    }
+
+    private static IComparable GetSortValue(DataTableRow row, string columnKey)
+    {
+        if (!row.Values.TryGetValue(columnKey, out var value))
+            return string.Empty;
+
+        // Try numeric sort first
+        if (double.TryParse(value.DisplayValue, out var numericValue))
+            return numericValue;
+
+        return value.DisplayValue;
+    }
+
     private static bool RowMatchesFilter(DataTableRow row, Regex regex, List<DataTableColumn> columns)
     {
         foreach (var column in columns)

src/Microsoft.PowerShell.ConsoleGuiTools/OutTableViewWindow.cs

@@ -32,6 +32,8 @@ internal sealed class OutTableViewWindow : Runnable<HashSet<int>>
     private TextField? _filterField;
     private Label? _filterLabel;
     private bool _isLoading = true;
+    private int _sortColumn = -1;
+    private bool _sortDescending;
 
     private StatusBar? _statusBar;
     private TableView? _tableView;
@@ -217,6 +219,19 @@ private void RebuildTableSource()
         _tableView.Table = _filteredDataSource;
     }
 
+    private void ApplySortAndFilter()
+    {
+        // Apply filter first, then sort
+        ApplyFilter();
+
+        if (_sortColumn < 0 || _filteredDataSource == null || _tableView == null)
+            return;
+
+        _filteredDataSource = _filteredDataSource.Sort(_sortColumn, _sortDescending);
+        _tableView.Table = _filteredDataSource;
+        _tableView?.Update();
+    }
+
     private void ApplySearch()
     {
         if (string.IsNullOrEmpty(_applicationData.Search) || _filteredDataSource == null || _tableView == null)
@@ -336,6 +351,31 @@ private void AddTableView()
         // Enter key activates selection
         if (_applicationData.OutputMode != OutputModeOption.None) _tableView.Accepted += (_, _) => Accept();
 
+        // Column header click sorts
+        _tableView.Activating += (_, e) =>
+        {
+            if (e.Context?.Binding is not MouseBinding { MouseEvent: { } mouse })
+                return;
+
+            if (!mouse.Flags.HasFlag(MouseFlags.LeftButtonClicked))
+                return;
+
+            _tableView.ScreenToCell(mouse.Position!.Value, out int? clickedCol);
+            if (clickedCol == null)
+                return;
+
+            // Toggle direction if clicking same column, otherwise sort ascending
+            if (clickedCol.Value == _sortColumn)
+                _sortDescending = !_sortDescending;
+            else
+            {
+                _sortColumn = clickedCol.Value;
+                _sortDescending = false;
+            }
+
+            ApplySortAndFilter();
+        };
+
         Add(_tableView);
     }
 

src/Microsoft.PowerShell.ConsoleGuiTools/Properties/launchSettings.json

@@ -33,7 +33,7 @@
     "OCTV": {
       "commandName": "Executable",
       "executablePath": "C:\\Program Files\\PowerShell\\7-preview\\pwsh.exe",
-      "commandLineArgs": "-NoProfile -NoLogo -NoExit -Command \"& { Import-Module '$(TargetPath)'; Get-Process | Select-Object ProcessName, Id,\r\n   @{Name='CPU(s)'; Expression={[math]::Round($_.CPU,2)}},\r\n   @{Name='WorkingSet(MB)'; Expression={[math]::Round($_.WorkingSet64/1MB,2)}},\r\n   @{Name='Private(MB)'; Expression={[math]::Round($_.PrivateMemorySize64/1MB,2)}}\r\n    | Out-ConsoleTableView -Debug -Title \"processes\" -MinUI -Filter pass -OutputMode Single}\"",
+      "commandLineArgs": "-NoProfile -NoLogo -NoExit -Command \"& { Import-Module '$(TargetPath)'; Get-Process | Select-Object ProcessName, Id,\r\n   @{Name='CPU(s)'; Expression={[math]::Round($_.CPU,2)}},\r\n   @{Name='WorkingSet(MB)'; Expression={[math]::Round($_.WorkingSet64/1MB,2)}},\r\n   @{Name='Private(MB)'; Expression={[math]::Round($_.PrivateMemorySize64/1MB,2)}}\r\n    | Out-ConsoleTableView -Debug -Title \"processes\" }\"",
       "workingDirectory": "$(TargetDir)"
     },
     "OCTV Slow": {