feat(control): grid snap, NPC context actions, and overlay dim fix

Re-enable users-branch UI, snap session tokens to square/hex grid from the control preview, refine inactive/open-info NPC menus, block marker actions while an effect brush is active, and dim materials/NPC overlays only when they are open.

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

app/main/index.ts

@@ -19,6 +19,7 @@ import {
   stripProjectZipExtension,
 } from '../shared/project/projectZipExtension';
 import type { Project } from '../shared/types';
+import { asNpcId } from '../shared/types/ids';
 
 import { EffectsStore, effectsDefaultTool } from './effects/effectsStore';
 import { SceneDarknessStore } from './effects/sceneDarknessStore';
@@ -34,6 +35,7 @@ import { PlayersStore } from './players/playersStore';
 import { SceneNpcTokensSessionStore } from './players/sceneNpcTokensSessionStore';
 import { ScenePlayerTokensSessionStore } from './players/scenePlayerTokensSessionStore';
 import { SceneTokensSessionStore } from './tokens/sceneTokensSessionStore';
+import { TokenGridSnapSessionStore } from './tokens/tokenGridSnapSessionStore';
 import { TokensStore } from './tokens/tokensStore';
 import { installAutoUpdater } from './update/installAutoUpdater';
 import { getAppSemanticVersion, getOptionalBuildNumber } from './versionInfo';
@@ -156,6 +158,7 @@ const npcsOverlayStore = new NpcsOverlayStore();
 const sceneTokensSessionStore = new SceneTokensSessionStore();
 const sceneNpcTokensSessionStore = new SceneNpcTokensSessionStore();
 const scenePlayerTokensSessionStore = new ScenePlayerTokensSessionStore();
+const tokenGridSnapSessionStore = new TokenGridSnapSessionStore();
 let tokensStore: TokensStore | null = null;
 let playersStore: PlayersStore | null = null;
 
@@ -226,6 +229,13 @@ function emitSceneTokensSessionState(): void {
   }
 }
 
+function emitTokenGridSnapState(): void {
+  const { enabled } = tokenGridSnapSessionStore.getState();
+  for (const win of BrowserWindow.getAllWindows()) {
+    win.webContents.send(ipcChannels.tokenGridSnap.stateChanged, { enabled });
+  }
+}
+
 function emitPlayersState(): void {
   const players = playersStore?.listPlayers() ?? [];
   const teams = playersStore?.listTeams() ?? [];
@@ -432,6 +442,7 @@ async function main() {
     sceneTokensSessionStore.reset();
     sceneNpcTokensSessionStore.reset();
     scenePlayerTokensSessionStore.reset();
+    tokenGridSnapSessionStore.reset();
     if (USERS_BRANCH_FEATURES_ENABLED) {
       const playerIds = Array.isArray(req?.playerIds) ? req.playerIds.map(String).filter(Boolean) : [];
       if (playerIds.length > 0) {
@@ -450,11 +461,14 @@ async function main() {
     emitSceneTokensSessionState();
     emitSceneNpcTokensSessionState();
     emitScenePlayerTokensSessionState();
+    emitTokenGridSnapState();
     emitEffectsState();
     return { ok: true };
   });
   registerHandler(ipcChannels.windows.closeMultiWindow, () => {
     closeMultiWindow();
+    tokenGridSnapSessionStore.reset();
+    emitTokenGridSnapState();
     return { ok: true };
   });
   registerHandler(ipcChannels.windows.syncChromeTitles, ({ localeTag }) => {
@@ -507,8 +521,13 @@ async function main() {
     closeSceneEditorWindow();
     return { ok: true };
   });
-  registerHandler(ipcChannels.windows.openNpcs, () => {
+  registerHandler(ipcChannels.windows.openNpcs, (req) => {
     openNpcsWindow();
+    const npcId = req?.npcId ? asNpcId(String(req.npcId)) : null;
+    if (npcId) {
+      npcsOverlayStore.dispatch({ kind: 'show', npcId });
+      emitNpcsOverlayState();
+    }
     return { ok: true };
   });
   registerHandler(ipcChannels.windows.closeNpcs, () => {
@@ -576,6 +595,7 @@ async function main() {
     sceneTokensSessionStore.reset();
     sceneNpcTokensSessionStore.reset();
     scenePlayerTokensSessionStore.reset();
+    tokenGridSnapSessionStore.reset();
     emitEffectsState();
     emitMaterialsOverlayState();
     emitNpcsOverlayState();
@@ -585,6 +605,7 @@ async function main() {
     emitSceneTokensSessionState();
     emitSceneNpcTokensSessionState();
     emitScenePlayerTokensSessionState();
+    emitTokenGridSnapState();
     emitSessionState();
     return { ok: true };
   });
@@ -1361,6 +1382,13 @@ async function main() {
     return { ok: true };
   });
 
+  registerHandler(ipcChannels.tokenGridSnap.getState, () => tokenGridSnapSessionStore.getState());
+  registerHandler(ipcChannels.tokenGridSnap.setEnabled, ({ enabled }) => {
+    const next = tokenGridSnapSessionStore.setEnabled(enabled);
+    emitTokenGridSnapState();
+    return next;
+  });
+
   registerHandler(ipcChannels.players.list, async () => {
     if (!USERS_BRANCH_FEATURES_ENABLED || !playersStore) {
       return { players: [], teams: [] };