Fix 7 change handlers not updating Entity + subform styling

Critical: OnChanged handlers now write to Entity immediately:
- OnGenderChanged: Entity.Gender = value
- OnIsInfectedChanged: Entity.IsPokerusInfected = value
- OnSelectedHeldItemChanged: Entity.HeldItem sync
- OnSelectedAbilityChanged: Entity.Ability sync
- OnNicknameChanged: Entity.Nickname = value
- OnIsEggChanged: Entity.IsEgg = value
- OnIsShinyChanged: Entity.SetShiny/SetPIDGender

Without these, Entity was stale during editing — legality checks
and sprite updates used old data until PreparePKM was called.

Subform: Fix SAVRTC2View title font size.

PKHeX.Avalonia/ViewModels/PKMEditorViewModel.cs

@@ -58,8 +58,11 @@ public partial class PKMEditorViewModel : ObservableObject
     partial void OnGenderChanged(byte value)
     {
         OnPropertyChanged(nameof(GenderSymbol));
-        if (!_isPopulating)
+        if (!_isPopulating && Entity is not null)
+        {
+            Entity.Gender = value;
             UpdateSprite();
+        }
     }
 
     /// <summary>Tooltip showing the numeric species ID.</summary>
@@ -126,6 +129,8 @@ public string NatureTooltip
     partial void OnIsInfectedChanged(bool value)
     {
         OnPropertyChanged(nameof(ShowPkrsDetails));
+        if (!_isPopulating && Entity is not null)
+            Entity.IsPokerusInfected = value;
     }
 
     // Shiny display indicators
@@ -708,8 +713,11 @@ private void UpdateRegionNames()
     {
         if (value is not null)
             HeldItem = value.Value;
-        if (!_isPopulating)
+        if (!_isPopulating && Entity is not null)
+        {
+            Entity.HeldItem = HeldItem;
             UpdateLegality();
+        }
     }
 
     partial void OnSelectedMove1Changed(ComboItem? value)
@@ -748,8 +756,11 @@ private void UpdateRegionNames()
     {
         if (value is not null)
             Ability = value.Value;
-        if (!_isPopulating)
+        if (!_isPopulating && Entity is not null)
+        {
+            Entity.Ability = Ability;
             UpdateLegality();
+        }
     }
 
     partial void OnSelectedLanguageChanged(ComboItem? value)
@@ -2057,6 +2068,7 @@ private async Task ShowFullLegalityReport()
     partial void OnNicknameChanged(string value)
     {
         if (_isPopulating || Entity is null) return;
+        Entity.Nickname = value;
         var defaultName = SpeciesName.GetSpeciesNameGeneration(Entity.Species, Entity.Language, Entity.Format);
         if (value != defaultName)
             IsNicknamed = true;
@@ -2092,8 +2104,9 @@ private async Task ShowFullLegalityReport()
 
     partial void OnIsEggChanged(bool value)
     {
-        if (!_isPopulating)
+        if (!_isPopulating && Entity is not null)
         {
+            Entity.IsEgg = value;
             UpdateLegality();
             UpdateSprite();
         }
@@ -2102,8 +2115,12 @@ private async Task ShowFullLegalityReport()
 
     partial void OnIsShinyChanged(bool value)
     {
-        if (!_isPopulating)
+        if (!_isPopulating && Entity is not null)
+        {
+            if (value && !Entity.IsShiny) Entity.SetShiny();
+            else if (!value && Entity.IsShiny) Entity.SetPIDGender(Entity.Gender);
             UpdateSprite();
+        }
     }
 
     // --- IV changed handlers → recalc stats + legality ---

PKHeX.Avalonia/Views/Subforms/SAVRTC2View.axaml

@@ -23,7 +23,7 @@
         </StackPanel>
 
         <StackPanel Spacing="8" VerticalAlignment="Center">
-            <TextBlock Text="Gen 2 Crystal Real-Time Clock" FontWeight="SemiBold" FontSize="12" />
+            <TextBlock Text="Gen 2 Crystal Real-Time Clock" FontWeight="SemiBold" FontSize="13" />
             <TextBlock Text="{Binding StatusText}" TextWrapping="Wrap" FontSize="11" />
         </StackPanel>
     </DockPanel>