feat: multi-material overlays, presentation guides, and release prebuilds

Align control/presentation with presentation screen rect and darkness z-order; sync window titles and session window cleanup. Pack Win/Mac/Linux with npmRebuild disabled and release-native-prep for classic-level and sharp.

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

app/renderer/sceneEditor/SceneEditorApp.module.css

@@ -11,10 +11,11 @@
 .sidebar {
   border-right: 1px solid var(--stroke, #2a2f3a);
   padding: 12px;
-  overflow: auto;
+  overflow: hidden;
   display: flex;
   flex-direction: column;
   gap: 10px;
+  min-height: 0;
 }
 
 .sideTitle {
@@ -23,6 +24,25 @@
   letter-spacing: 0.04em;
   text-transform: uppercase;
   opacity: 0.85;
+  flex-shrink: 0;
+  min-width: 0;
+}
+
+.hint {
+  font-size: 12px;
+  opacity: 0.65;
+  line-height: 1.35;
+  flex-shrink: 0;
+}
+
+.accordionScroll {
+  flex: 1 1 auto;
+  min-height: 0;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  padding-bottom: 12px;
 }
 
 .accordion {
@@ -30,6 +50,7 @@
   border-radius: 10px;
   overflow: hidden;
   background: rgba(255, 255, 255, 0.02);
+  flex-shrink: 0;
 }
 
 .accordionHead {
@@ -147,12 +168,6 @@
   font-weight: 600;
 }
 
-.hint {
-  font-size: 12px;
-  opacity: 0.65;
-  line-height: 1.35;
-}
-
 .stage {
   position: relative;
   min-width: 0;