fix(text): show selected formatting and style controls

Use category-filtered font and selected-item dropdowns, separate horizontal and vertical alignment, and reuse the border-color palette templates for text color. Persist vertical alignment additively. Follow the established static text-source pattern: https://obsproject.com/kb/text-sources

Services/LayoutStore.Load.cs

@@ -113,7 +113,7 @@ public partial class LayoutStore : IDisposable
                        AlertVideoAssetId, AlertVideoPath, AlertUseDefaultVideo, AlertShowTicker, AlertVideoVolume, SortOrder,
                        AlertDisplayMethod, IsBrandLogo, BlurAmount, AlertAudioPath, AlertAudioLoop,
                         TextContent, TextFontFamily, TextFontSize, TextColor, TextBold, TextItalic,
-                        TextUnderline, TextAlignment
+                        TextUnderline, TextAlignment, TextVerticalAlignment
                 FROM Source ORDER BY SortOrder
                 """;
             using var reader = cmd.ExecuteReader();
@@ -179,6 +179,10 @@ public partial class LayoutStore : IDisposable
                     TextAlignment = reader.IsDBNull(48) || !Enum.IsDefined((TextLayerAlignment)reader.GetInt32(48))
                         ? TextLayerAlignment.Left
                         : (TextLayerAlignment)reader.GetInt32(48),
+                    TextVerticalAlignment = reader.IsDBNull(49)
+                        || !Enum.IsDefined((TextLayerVerticalAlignment)reader.GetInt32(49))
+                            ? TextLayerVerticalAlignment.Top
+                            : (TextLayerVerticalAlignment)reader.GetInt32(49),
                 };
                 if (!sourcesByScene.TryGetValue(sceneId, out var list))
                     sourcesByScene[sceneId] = list = new List<(Source, int)>();