feat(scenes): rich scene descriptions and control viewer window

Add TipTap editing in the editor and an Electron window on the control panel to read the current scene description.

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

app/renderer/shared/ui/controls.tooltip.test.ts

@@ -12,4 +12,5 @@ void test('Button: тултип через портал (title), не тольк
   assert.ok(src.includes('role="tooltip"'));
   assert.ok(src.includes('onMouseEnter={showTip}'));
   assert.ok(src.includes('document.body'));
+  assert.ok(src.includes('disabledTipHost'), 'disabled + title → хост для hover-тултипа');
 });