diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..0d51722
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2026-06-29 - Stale closures in external test hooks with useMemo Maps
+**Learning:** When replacing array lookups with memoized Maps (`useMemo`) in React components, using the memoized Map within imperative external bindings (e.g., `window.__MAP_APP_TEST`) initialized outside the React render cycle can introduce stale closures.
+**Action:** Retain original array lookups (e.g., `array.find()`) for specific external bindings and global test hooks, while upgrading render-cycle array lookups to Map dictionary lookups.
\ No newline at end of file
diff --git a/components/territory/territory-workspace.tsx b/components/territory/territory-workspace.tsx
index 6d2ff49..e18d7be 100644
--- a/components/territory/territory-workspace.tsx
+++ b/components/territory/territory-workspace.tsx
@@ -570,13 +570,25 @@ export function TerritoryWorkspace({ orgSlug, initialDashboard, territoryConfig
   const mobileViewAutoSwitchedRef = useRef(initialPreferListView);
 
   const pins = data.pins;
-  const selectedPin = useMemo(() => pins.find((pin) => pin.id === selectedId) ?? null, [pins, selectedId]);
+  // ⚡ Bolt Optimization: Construct O(1) Map dictionary to prevent O(N*M) nested array lookups during React renders
+  const pinsById = useMemo(() => {
+    const map = new Map<string, TerritoryAccountPin>();
+    for (const pin of pins) {
+      map.set(pin.id, pin);
+    }
+    return map;
+  }, [pins]);
+  const selectedPin = useMemo(() => {
+    if (!selectedId) return null;
+    return pinsById.get(selectedId) ?? null;
+  }, [pinsById, selectedId]);
   const routeStops = useMemo(
     () =>
       routePlanningEnabled
-        ? routeStopIds.map((id) => pins.find((pin) => pin.id === id)).filter((pin): pin is TerritoryAccountPin => Boolean(pin))
+        // ⚡ Bolt Optimization: Use Map lookup instead of Array.find inside .map
+        ? routeStopIds.map((id) => pinsById.get(id)).filter((pin): pin is TerritoryAccountPin => Boolean(pin))
         : [],
-    [pins, routePlanningEnabled, routeStopIds],
+    [pinsById, routePlanningEnabled, routeStopIds],
   );
   const mappablePinCount = useMemo(() => pins.filter(hasUsableCoordinates).length, [pins]);
   const activeFilterCount = Object.values(filters).filter(Boolean).length;