feat(control): инструмент «Маркер» на области видимости

Добавлена кисть маркера на пульте и презентации с настройками в панели эффектов; штрихи привязаны к жёлтой рамке, ластик и очистка работают с отдельным сессионным слоем.

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

app/shared/ipc/contracts.ts

@@ -27,6 +27,8 @@ import type {
   Scene,
   SceneDarknessEvent,
   SceneDarknessState,
+  SceneMarkerEvent,
+  SceneMarkerState,
   SceneGrid,
   SceneId,
   SceneNpcToken,
@@ -182,6 +184,11 @@ export const ipcChannels = {
     dispatch: 'sceneDarkness.dispatch',
     stateChanged: 'sceneDarkness.stateChanged',
   },
+  sceneMarker: {
+    getState: 'sceneMarker.getState',
+    dispatch: 'sceneMarker.dispatch',
+    stateChanged: 'sceneMarker.stateChanged',
+  },
   sceneTraps: {
     getState: 'sceneTraps.getState',
     dispatch: 'sceneTraps.dispatch',
@@ -315,6 +322,7 @@ export type IpcEventMap = {
   [ipcChannels.materialsOverlay.stateChanged]: { state: MaterialsOverlayState };
   [ipcChannels.npcsOverlay.stateChanged]: { state: NpcsOverlayState };
   [ipcChannels.sceneDarkness.stateChanged]: { state: SceneDarknessState };
+  [ipcChannels.sceneMarker.stateChanged]: { state: SceneMarkerState };
   [ipcChannels.sceneTraps.stateChanged]: { state: SceneTrapsState };
   [ipcChannels.sceneView.stateChanged]: { state: SceneViewState };
   [ipcChannels.tokens.stateChanged]: { tokens: AppToken[] };
@@ -771,6 +779,14 @@ export type IpcInvokeMap = {
     req: { event: SceneDarknessEvent };
     res: { ok: true };
   };
+  [ipcChannels.sceneMarker.getState]: {
+    req: Record<string, never>;
+    res: { state: SceneMarkerState };
+  };
+  [ipcChannels.sceneMarker.dispatch]: {
+    req: { event: SceneMarkerEvent };
+    res: { ok: true };
+  };
   [ipcChannels.sceneTraps.getState]: {
     req: Record<string, never>;
     res: { state: SceneTrapsState };
@@ -952,6 +968,7 @@ export type LegacyIpcEventMap = {
   [ipcChannels.materialsOverlay.stateChanged]: { state: MaterialsOverlayState };
   [ipcChannels.npcsOverlay.stateChanged]: { state: NpcsOverlayState };
   [ipcChannels.sceneDarkness.stateChanged]: { state: SceneDarknessState };
+  [ipcChannels.sceneMarker.stateChanged]: { state: SceneMarkerState };
   [ipcChannels.sceneTraps.stateChanged]: { state: SceneTrapsState };
   [ipcChannels.sceneView.stateChanged]: { state: SceneViewState };
   [ipcChannels.tokens.stateChanged]: { tokens: AppToken[] };