feat: scene traps, material legends, and scene editor window

Add trap overlays with session state, material legend editor/panel, and a dedicated scene editor window wired through IPC and project persistence.

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

app/renderer/editor/EditorApp.tsx

@@ -1564,6 +1564,16 @@ export function EditorApp() {
             });
           });
         }}
+        onLegendChange={async (materialId, legend) => {
+          try {
+            await actions.setMaterialLegend(materialId, legend);
+          } catch (e) {
+            setAppNotice({
+              title: t('common.error'),
+              message: e instanceof Error ? e.message : String(e),
+            });
+          }
+        }}
       />
       <MaterialEditModal
         open={materialEdit !== null}
@@ -2599,6 +2609,14 @@ function SceneInspector({
             />
             <span className={styles.spanSm}>{t('scene.darkenScene')}</span>
           </label>
+          <div className={styles.spacer6} />
+          <Button
+            onClick={() => {
+              void getDndApi().invoke(ipcChannels.windows.openSceneEditor, {});
+            }}
+          >
+            Редактор сцены
+          </Button>
         </>
       ) : null}
       <div className={styles.spacer6} />