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/renderer/npcs/NpcsApp.tsx

@@ -185,6 +185,15 @@ export function NpcsApp() {
     () => activeIds.map((id) => npcs.find((n) => n.id === id)).filter((n): n is ProjectNpc => Boolean(n)),
     [activeIds, npcs],
   );
+  /** Описание: сфокусированный НПС (открытие информации / последний выбор), иначе все активные. */
+  const detailNpcs = useMemo(() => {
+    const focusId = overlay?.focusNpcId ?? null;
+    if (focusId) {
+      const focused = npcs.find((n) => n.id === focusId);
+      if (focused) return [focused];
+    }
+    return selectedNpcs;
+  }, [npcs, overlay?.focusNpcId, selectedNpcs]);
 
   const filteredNpcs = useMemo(() => {
     const q = query.trim().toLowerCase();
@@ -226,7 +235,7 @@ export function NpcsApp() {
 
   const relationsByNpcId = useMemo(() => {
     const map = new Map<NpcId, { id: string; text: string }[]>();
-    for (const npc of selectedNpcs) {
+    for (const npc of detailNpcs) {
       const list = relations
         .filter((r) => r.sourceNpcId === npc.id)
         .map((r) => {
@@ -236,7 +245,7 @@ export function NpcsApp() {
       map.set(npc.id, list);
     }
     return map;
-  }, [npcs, relations, selectedNpcs]);
+  }, [detailNpcs, npcs, relations]);
 
   const onSelectTile = useCallback(
     (id: NpcId) => {
@@ -304,8 +313,8 @@ export function NpcsApp() {
 
       <div className={styles.body}>
         <div className={styles.detail}>
-          {selectedNpcs.length > 0 ? (
-            selectedNpcs.map((npc) => {
+          {detailNpcs.length > 0 ? (
+            detailNpcs.map((npc) => {
               const safeHtml = sanitizeSceneDescriptionHtml(npc.description);
               const npcRelations = relationsByNpcId.get(npc.id) ?? [];
               return (