feat: save games and edit scene darkness

Persist show state to local saves; author map darkness in scene editor with bake-to-scene and help updates.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/editor/EditorApp.module.css

@@ -385,6 +385,11 @@
   font: inherit;
 }
 
+.fileMenuItem:disabled {
+  opacity: 0.45;
+  cursor: default;
+}
+
 .fileMenuItemDanger {
   text-align: left;
   padding: 10px;
@@ -525,6 +530,30 @@
   box-sizing: border-box;
 }
 
+.saveList {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  max-height: 240px;
+  overflow: auto;
+}
+
+.saveRow {
+  text-align: left;
+  padding: 8px 10px;
+  border-radius: var(--radius-sm);
+  border: 1px solid var(--stroke);
+  background: transparent;
+  color: inherit;
+  cursor: pointer;
+  font: inherit;
+}
+
+.saveRowSelected {
+  border-color: var(--scene-list-selected-border);
+  background: var(--scene-list-selected-bg);
+}
+
 .licenseBlockTitle {
   font-weight: 900;
   font-size: var(--text-lg);
@@ -921,6 +950,11 @@
   width: 100%;
 }
 
+.actionsRowHalf > button {
+  min-width: 0;
+  width: 100%;
+}
+
 .actionsRowHalf > span {
   display: flex;
   min-width: 0;