fix(word-html): render tracked changes, rotated cell text, and cell noWrap

Render-comparison testing found several cell/revision rendering gaps:

- Tracked insertions (<w:ins>) previously rendered as plain text, losing
  the author annotation. Now wrap in a .track-ins span with underline +
  green color, with the author name in a tooltip.
- Tracked deletions (<w:del>) were dropped entirely, leaving the
  reviewer unable to see what was removed. Now render the deleted text
  inside a .track-del span with strikethrough + red color.
- Cell <w:textDirection> btLr/tbRl was ignored — text stayed horizontal
  where Word rotates 90°. Emit CSS writing-mode:vertical-rl; btLr adds
  a 180° rotation to flip the reading direction.
- Cell <w:noWrap/> was dropped — now emits white-space:nowrap so cell
  content doesn't wrap.

src/officecli/Handlers/Word/WordHandler.HtmlPreview.Css.cs

@@ -1165,6 +1165,25 @@ public partial class WordHandler
                 parts.Add($"width:{w / 50.0:0.#}%");
         }
 
+        // Cell text direction (tcDir): rotate text 90° or 270° via CSS writing-mode + transform
+        // Common values: btLr (bottom→top, left→right = 90° CCW), tbRl (top→bottom, right→left = 90° CW)
+        var tcDir = tcPr.GetFirstChild<TextDirection>()?.Val?.InnerText;
+        if (tcDir != null)
+        {
+            var wm = tcDir switch
+            {
+                "btLr" => "vertical-rl;transform:rotate(180deg)", // read bottom-up
+                "tbRl" => "vertical-rl",                            // read top-down
+                "lrTb" or null => null,                             // default horizontal
+                _ => null,
+            };
+            if (wm != null) parts.Add($"writing-mode:{wm}");
+        }
+
+        // Cell noWrap — prevents content wrapping within the cell
+        if (tcPr.NoWrap != null)
+            parts.Add("white-space:nowrap");
+
         // Padding — add vertical compensation for CSS line-height:1 clipping glyph ascenders
         const double CellPadVComp = 3.0; // pt
         var margins = tcPr?.TableCellMargin;

src/officecli/Handlers/Word/WordHandler.HtmlPreview.Text.cs

@@ -93,13 +93,26 @@ public partial class WordHandler
             }
             else if (child.LocalName is "ins" or "moveTo")
             {
-                // Tracked insertions — render their child runs
+                // Tracked insertions — underline to match Word's default revision mark style
+                var author = child.GetAttributes().FirstOrDefault(a => a.LocalName == "author").Value;
+                var authorAttr = string.IsNullOrEmpty(author) ? "" : $" title=\"Inserted by {HtmlEncodeAttr(author)}\"";
+                sb.Append($"<span class=\"track-ins\" style=\"text-decoration:underline;color:#2E7D32\"{authorAttr}>");
                 foreach (var insRun in child.Elements<Run>())
                     RenderRunHtml(sb, insRun, para);
+                sb.Append("</span>");
             }
             else if (child.LocalName is "del" or "moveFrom")
             {
-                // Tracked deletions — skip (deleted content should not be displayed)
+                // Tracked deletions — strikethrough with color, preserving the deleted text
+                // The delText inside del runs carries the actual deleted content; we render it so
+                // a reader of the preview can see what was removed.
+                var author = child.GetAttributes().FirstOrDefault(a => a.LocalName == "author").Value;
+                var authorAttr = string.IsNullOrEmpty(author) ? "" : $" title=\"Deleted by {HtmlEncodeAttr(author)}\"";
+                var delText = string.Concat(child.Descendants()
+                    .Where(e => e.LocalName == "delText" || e.LocalName == "t")
+                    .Select(e => e.InnerText));
+                if (!string.IsNullOrEmpty(delText))
+                    sb.Append($"<span class=\"track-del\" style=\"text-decoration:line-through;color:#C62828\"{authorAttr}>{HtmlEncode(delText)}</span>");
             }
             else if (child is Hyperlink hyperlink)
             {