diff --git a/app/main/index.ts b/app/main/index.ts
index 1791993..51a6ee9 100644
--- a/app/main/index.ts
+++ b/app/main/index.ts
@@ -54,6 +54,7 @@ import {
   closeMaterialsWindow,
   closeNpcsEditorWindow,
   closeNpcsWindow,
+  sendToAppWindows,
   togglePresentationFullscreen,
   waitForEditorWindowReady,
 } from './windows/createWindows';
@@ -229,9 +230,8 @@ function emitSessionState(): void {
     project,
     currentSceneId: project?.currentSceneId ?? null,
   };
-  for (const win of BrowserWindow.getAllWindows()) {
-    win.webContents.send(ipcChannels.session.stateChanged, { state });
-  }
+  // Не шлём полный project в editor/splash — редактор обновляется через invoke-ответы.
+  sendToAppWindows(ipcChannels.session.stateChanged, { state });
 }
 
 /**
@@ -676,8 +676,8 @@ async function main() {
     },
   );
   registerHandler(ipcChannels.project.updateNpcPosition, async ({ npcId, x, y }) => {
+    // Layout-only: Presentation/Control не читают npc.x/y; UI коммитит локально из ответа invoke.
     const project = await projectStore.updateNpcPosition(npcId, x, y);
-    emitSessionState();
     return { project };
   });
   registerHandler(ipcChannels.project.deleteNpc, async ({ npcId }) => {
@@ -811,8 +811,8 @@ async function main() {
     return { project };
   });
   registerHandler(ipcChannels.project.updateSceneGraphNodePosition, async ({ nodeId, x, y }) => {
+    // Layout-only: граф сцен живёт в editor (optimistic + invoke); session broadcast не нужен.
     const project = await projectStore.updateSceneGraphNodePosition(nodeId, x, y);
-    emitSessionState();
     return { project };
   });
   registerHandler(ipcChannels.project.addSceneGraphNode, async ({ sceneId, x, y }) => {
diff --git a/app/main/sessionIpc.phase6.networkRegression.test.ts b/app/main/sessionIpc.phase6.networkRegression.test.ts
new file mode 100644
index 0000000..444252f
--- /dev/null
+++ b/app/main/sessionIpc.phase6.networkRegression.test.ts
@@ -0,0 +1,54 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+const here = path.dirname(fileURLToPath(import.meta.url));
+
+/**
+ * Фаза 6 (срез): layout-only мутации не должны слать полный Project во все окна.
+ * Редактор НПС применяет позицию из ответа invoke локально.
+ */
+void test('session IPC: нет emitSessionState на graph/NPC position hot-path', () => {
+  const index = fs.readFileSync(path.join(here, 'index.ts'), 'utf8');
+  const createWindows = fs.readFileSync(path.join(here, 'windows/createWindows.ts'), 'utf8');
+  const npcsEditor = fs.readFileSync(
+    path.join(here, '../renderer/npcs/NpcsEditorApp.tsx'),
+    'utf8',
+  );
+
+  assert.ok(index.includes('sendToAppWindows(ipcChannels.session.stateChanged'));
+  assert.ok(createWindows.includes('SESSION_STATE_WINDOW_KINDS'));
+  assert.ok(createWindows.includes('sendToAppWindows'));
+  const kindsBlock = /SESSION_STATE_WINDOW_KINDS: readonly WindowKind\[\] = \[([\s\S]*?)\] as const/.exec(
+    createWindows,
+  );
+  assert.ok(kindsBlock, 'SESSION_STATE_WINDOW_KINDS объявлен');
+  assert.doesNotMatch(kindsBlock[1] ?? '', /'editor'/, 'editor не получает session.stateChanged');
+  assert.match(kindsBlock[1] ?? '', /'presentation'/);
+  assert.match(kindsBlock[1] ?? '', /'control'/);
+
+  // Handlers больше не вызывают emitSessionState сразу после layout-update.
+  const npcPosHandler =
+    /registerHandler\(ipcChannels\.project\.updateNpcPosition,\s*async\s*\(\{ npcId, x, y \}\) => \{([\s\S]*?)\}\);/.exec(
+      index,
+    );
+  const graphPosHandler =
+    /registerHandler\(ipcChannels\.project\.updateSceneGraphNodePosition,\s*async\s*\(\{ nodeId, x, y \}\) => \{([\s\S]*?)\}\);/.exec(
+      index,
+    );
+  assert.ok(npcPosHandler, 'updateNpcPosition handler');
+  assert.ok(graphPosHandler, 'updateSceneGraphNodePosition handler');
+  assert.doesNotMatch(npcPosHandler[1] ?? '', /emitSessionState/);
+  assert.doesNotMatch(graphPosHandler[1] ?? '', /emitSessionState/);
+  assert.match(npcPosHandler[1] ?? '', /return \{ project \}/);
+  assert.match(graphPosHandler[1] ?? '', /return \{ project \}/);
+
+  assert.ok(npcsEditor.includes('updateNpcPosition'));
+  assert.match(
+    npcsEditor,
+    /onNodePositionCommit[\s\S]*?setSession\([\s\S]*?npcs: prev\.project\.npcs\.map/,
+  );
+  assert.match(npcsEditor, /await api\.invoke\(ipcChannels\.project\.updateNpcPosition/);
+});
diff --git a/app/main/windows/createWindows.ts b/app/main/windows/createWindows.ts
index 7687e96..03787d6 100644
--- a/app/main/windows/createWindows.ts
+++ b/app/main/windows/createWindows.ts
@@ -10,7 +10,7 @@ import { safeConsoleError } from '../safeConsole';
 import { getBootSplashWindow } from './bootWindow';
 import { loadBrandingWindowIcon } from './brandingIcon';
 
-type WindowKind =
+export type WindowKind =
   | 'editor'
   | 'presentation'
   | 'control'
@@ -19,6 +19,15 @@ type WindowKind =
   | 'npcsEditor'
   | 'npcs';
 
+/** Окна, которые реально слушают session.stateChanged (редактор синхронизируется через invoke). */
+export const SESSION_STATE_WINDOW_KINDS: readonly WindowKind[] = [
+  'presentation',
+  'control',
+  'materials',
+  'npcs',
+  'npcsEditor',
+] as const;
+
 const windows = new Map<WindowKind, BrowserWindow>();
 
 let appQuitting = false;
@@ -63,6 +72,23 @@ export function markAppQuitting(): void {
   appQuitting = true;
 }
 
+/** Точечная рассылка в известные окна приложения (без splash / чужих BrowserWindow). */
+export function sendToAppWindows(
+  channel: string,
+  payload: unknown,
+  kinds: readonly WindowKind[] = SESSION_STATE_WINDOW_KINDS,
+): void {
+  for (const kind of kinds) {
+    const win = windows.get(kind);
+    if (!win || win.isDestroyed() || win.webContents.isDestroyed()) continue;
+    try {
+      win.webContents.send(channel, payload);
+    } catch {
+      /* окно могло закрыться между проверкой и send */
+    }
+  }
+}
+
 function quitAppFromEditorClose(): void {
   markAppQuitting();
   app.quit();
diff --git a/app/renderer/npcs/NpcsEditorApp.tsx b/app/renderer/npcs/NpcsEditorApp.tsx
index 3947681..9db1b0b 100644
--- a/app/renderer/npcs/NpcsEditorApp.tsx
+++ b/app/renderer/npcs/NpcsEditorApp.tsx
@@ -685,7 +685,31 @@ export function NpcsEditorApp() {
               setRelationModal({ mode: 'create', sourceNpcId, targetNpcId });
             }}
             onNodePositionCommit={(npcId, x, y) => {
-              void api.invoke(ipcChannels.project.updateNpcPosition, { npcId, x, y });
+              void (async () => {
+                setSession((prev) => {
+                  if (!prev?.project) return prev;
+                  return {
+                    ...prev,
+                    project: {
+                      ...prev.project,
+                      npcs: prev.project.npcs.map((n) => (n.id === npcId ? { ...n, x, y } : n)),
+                    },
+                  };
+                });
+                try {
+                  const res = await api.invoke(ipcChannels.project.updateNpcPosition, {
+                    npcId,
+                    x,
+                    y,
+                  });
+                  setSession({
+                    project: res.project,
+                    currentSceneId: res.project?.currentSceneId ?? null,
+                  });
+                } catch {
+                  /* позиция уже оптимистично в UI; следующий session sync поправит при CRUD */
+                }
+              })();
             }}
             onEditRelation={(relationId) => {
               const rel = relations.find((r) => r.id === relationId);
diff --git a/app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts b/app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts
index 6da81f6..f68f064 100644
--- a/app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts
+++ b/app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts
@@ -29,6 +29,8 @@ void test('PxiEffectsOverlay: lazy VFX packs + idle ticker stop', () => {
   assert.ok(src.includes('collectNeededVfxPacks'));
   assert.ok(src.includes('syncTickerForState'));
   assert.ok(src.includes('app.ticker.stop'));
+  // После clear нужен явный render, иначе «очистить» замораживает кадр вместо исчезновения.
+  assert.match(src, /app\.render\?\.\(\);[\s\S]*?app\.ticker\.stop/);
   // Eager preload всех наборов при init убран.
   assert.doesNotMatch(
     src,
diff --git a/app/renderer/shared/effects/PxiEffectsOverlay.tsx b/app/renderer/shared/effects/PxiEffectsOverlay.tsx
index fa23279..75eda3a 100644
--- a/app/renderer/shared/effects/PxiEffectsOverlay.tsx
+++ b/app/renderer/shared/effects/PxiEffectsOverlay.tsx
@@ -223,6 +223,13 @@ export const PixiEffectsOverlay = forwardRef<PixiEffectsOverlayHandle, Props>(fu
       root.x = 0;
       root.y = 0;
     }
+    // Без этого кадра после syncNodes (clear) canvas остаётся со старым кадром:
+    // анимация «встаёт», но спрайты визуально не исчезают.
+    try {
+      app.render?.();
+    } catch {
+      /* ignore */
+    }
     try {
       app.ticker.stop();
     } catch {
diff --git a/package.json b/package.json
index 079c5bd..e03e85a 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "build:obfuscate": "node scripts/build.mjs --production --obfuscate",
     "lint": "eslint . --max-warnings 0",
     "typecheck": "tsc -p tsconfig.eslint.json --noEmit",
-    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/renderer/editor/state/projectState.race.test.ts app/renderer/editor/fileDrop.test.ts app/shared/graph/sceneListOrder.test.ts app/renderer/editor/graph/sceneCardById.test.ts app/renderer/editor/i18n/editorMessages.locale.test.ts app/renderer/editor/sceneDescriptionHtml.test.ts app/shared/graph/storylineExportImport.test.ts app/shared/foundry/foundryGraph.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/shared/fieldEffectEraser.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/control/controlApp.audioPerf.networkRegression.test.ts app/renderer/control/controlApp.brushPerf.networkRegression.test.ts app/renderer/shared/useAssetImageUrl.cache.test.ts app/renderer/shared/sceneOverlay/sceneOverlayHost.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/safeConsole.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/effects/sceneDarknessStore.test.ts app/main/project/assetPrune.test.ts app/main/project/optimizeImageImport.test.ts app/main/project/scenePreviewThumbnail.test.ts app/main/project/fsRetry.test.ts app/main/project/zipRead.test.ts app/main/project/replaceFileAtomic.test.ts app/main/project/zipStore.legacyContract.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/shared/video/videoPlaybackPerf.networkRegression.test.ts app/shared/video/videoPlaybackLoop.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts app/main/license/machineFingerprint.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs scripts/release-mac-prep.test.mjs",
+    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/renderer/editor/state/projectState.race.test.ts app/renderer/editor/fileDrop.test.ts app/shared/graph/sceneListOrder.test.ts app/renderer/editor/graph/sceneCardById.test.ts app/renderer/editor/i18n/editorMessages.locale.test.ts app/renderer/editor/sceneDescriptionHtml.test.ts app/shared/graph/storylineExportImport.test.ts app/shared/foundry/foundryGraph.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/shared/fieldEffectEraser.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/control/controlApp.audioPerf.networkRegression.test.ts app/renderer/control/controlApp.brushPerf.networkRegression.test.ts app/renderer/shared/useAssetImageUrl.cache.test.ts app/main/sessionIpc.phase6.networkRegression.test.ts app/renderer/shared/sceneOverlay/sceneOverlayHost.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/safeConsole.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/effects/sceneDarknessStore.test.ts app/main/project/assetPrune.test.ts app/main/project/optimizeImageImport.test.ts app/main/project/scenePreviewThumbnail.test.ts app/main/project/fsRetry.test.ts app/main/project/zipRead.test.ts app/main/project/replaceFileAtomic.test.ts app/main/project/zipStore.legacyContract.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/shared/video/videoPlaybackPerf.networkRegression.test.ts app/shared/video/videoPlaybackLoop.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts app/main/license/machineFingerprint.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs scripts/release-mac-prep.test.mjs",
     "format": "prettier . --check",
     "format:write": "prettier . --write",
     "postinstall": "patch-package",