feat(npcs): add campaign NPCs with relation graph and session overlay

Add a dedicated NPC editor window, directed relations, control/presentation avatar overlay, and ru/en help for the new section.

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

app/main/windows/createWindows.editorClose.test.ts

@@ -52,6 +52,16 @@ void test('createWindows: окно материалов закрывается
   assert.match(src, /export function closeMultiWindow[\s\S]*closeMaterialsWindow/);
 });
 
+void test('createWindows: окно НПС закрывается с multi-window', () => {
+  const src = readCreateWindows();
+  assert.ok(src.includes('openNpcsWindow'));
+  assert.ok(src.includes('closeNpcsWindow'));
+  assert.ok(src.includes('openNpcsEditorWindow'));
+  assert.ok(src.includes("createWindow('npcs'"));
+  assert.ok(src.includes("createWindow('npcsEditor'"));
+  assert.match(src, /export function closeMultiWindow[\s\S]*closeNpcsWindow/);
+});
+
 void test('createWindows: production — loadFile для HTML (не только file://)', () => {
   const src = readCreateWindows();
   assert.ok(src.includes('loadFile'));