Fix BaseInfiniteFirstCases getter using wrong case for state property

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/stores/allMapData.test.js

@@ -225,5 +225,17 @@ describe('allMapDataStore', () => {
       store.allProcessMap = { nodes: [1, 2] };
       expect(store.processMap).toEqual({ nodes: [1, 2] });
     });
+
+    it('BaseInfiniteFirstCases returns allBaseCase when baseInfiniteStart is 0', () => {
+      store.baseInfiniteStart = 0;
+      store.allBaseCase = [{ id: 1 }, { id: 2 }];
+      expect(store.BaseInfiniteFirstCases).toEqual([{ id: 1 }, { id: 2 }]);
+    });
+
+    it('BaseInfiniteFirstCases returns undefined when baseInfiniteStart is not 0', () => {
+      store.baseInfiniteStart = 5;
+      store.allBaseCase = [{ id: 1 }];
+      expect(store.BaseInfiniteFirstCases).toBeUndefined();
+    });
   });
 });