Load paintings instantly and allow overwriting saves in the paint HUD

Load now applies the selected slot immediately instead of going through a
confirmation dialog. Save keeps its OK button enabled even when the name
already exists (the warning text stays, purely informational) and writes
through with overwrite, so re-saving under the same name replaces the slot.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/MeshPainter.Persistence.cs

@@ -71,14 +71,15 @@ public partial class MeshPainter
     }
 
     /// <summary>
-    /// Writes the current painted maps to a new named slot. Returns false without writing if the painter
-    /// is not ready or a slot with this name already exists (no silent overwrite).
+    /// Writes the current painted maps to a named slot. Returns false without writing if the painter is
+    /// not ready. An existing slot of the same name is overwritten only when <paramref name="overwrite"/>
+    /// is true; otherwise the call fails rather than clobbering it.
     /// </summary>
-    public bool SavePaintAs(string name)
+    public bool SavePaintAs(string name, bool overwrite = false)
     {
         if (!_setupValid || string.IsNullOrWhiteSpace(name)) return false;
         name = name.Trim();
-        if (PaintExists(name)) return false;
+        if (!overwrite && PaintExists(name)) return false;
 
         try
         {

Assets/Scripts/PaintHud.Library.cs

@@ -9,9 +9,10 @@ using UnityEngine.UI;
 /// list, an entry template, and the Save / Confirm dialogs) is authored inside the PaintHudPanel layout
 /// prefab - this code only finds those objects by their stable names and wires the behaviour, exactly like
 /// <see cref="WirePanel"/> does for the brush widgets. The list is populated by cloning the authored
-/// Lib_EntryTemplate per saved slot. Save opens a name dialog (blocked if the name already exists, no
-/// overwrite); Load and Delete go through a confirmation dialog. Loading replaces the current painting and,
-/// when networked, re-broadcasts the loaded state to every other peer.
+/// Lib_EntryTemplate per saved slot. Save opens a name dialog (an existing name is overwritten, with a
+/// warning shown while typing); Load applies the selected slot immediately; Delete goes through a
+/// confirmation dialog. Loading replaces the current painting and, when networked, re-broadcasts the
+/// loaded state to every other peer.
 /// </summary>
 public partial class PaintHud
 {
@@ -55,7 +56,6 @@ public partial class PaintHud
 
     private static readonly Color EntryNormal = new Color(0.18f, 0.18f, 0.22f, 1f);
     private static readonly Color EntrySelected = new Color(0.20f, 0.45f, 0.80f, 1f);
-    private static readonly Color OkAccent = new Color(0.20f, 0.45f, 0.80f, 1f);
     private static readonly Color OkDanger = new Color(0.62f, 0.26f, 0.26f, 1f);
 
     // --- Bind (find authored objects, hook listeners) ---
@@ -200,17 +200,19 @@ public partial class PaintHud
         string name = _nameInput ? _nameInput.text.Trim() : "";
         bool empty = string.IsNullOrEmpty(name);
         bool exists = !empty && MeshPainter.PaintExists(name);
-        if (_saveOkButton) _saveOkButton.interactable = !empty && !exists && painter;
-        if (_saveInfo) _saveInfo.text = exists ? "A painting with this name already exists." : "";
+        // Overwrite is allowed -> the OK button stays enabled even when the name exists; the warning is
+        // purely informational so you know you are about to replace an existing slot.
+        if (_saveOkButton) _saveOkButton.interactable = !empty && painter;
+        if (_saveInfo) _saveInfo.text = exists ? "A painting with this name already exists and will be overwritten." : "";
     }
 
     private void ConfirmSave()
     {
         if (!painter || !_nameInput) return;
         string name = _nameInput.text.Trim();
-        if (string.IsNullOrEmpty(name) || MeshPainter.PaintExists(name)) { ValidateSaveName(); return; }
+        if (string.IsNullOrEmpty(name)) { ValidateSaveName(); return; }
 
-        if (painter.SavePaintAs(name))
+        if (painter.SavePaintAs(name, overwrite: true))
         {
             _selectedPainting = name;
             if (_saveDialog) _saveDialog.SetActive(false);
@@ -225,8 +227,7 @@ public partial class PaintHud
     private void OnLoadClicked()
     {
         if (!painter || string.IsNullOrEmpty(_selectedPainting)) return;
-        string name = _selectedPainting;
-        ShowConfirm($"Load \"{name}\"?\nThe current painting will be lost.", OkAccent, () => DoLoad(name));
+        DoLoad(_selectedPainting); // load immediately, no confirmation
     }
 
     private void OnDeleteClicked()