fix: preserve original filename case in handelize (MEMORY.md not memory.md)

src/store.ts

@@ -1595,7 +1595,6 @@ export function handelize(path: string): string {
 
   const result = path
     .replace(/___/g, '/')       // Triple underscore becomes folder separator
-    .toLowerCase()
     .split('/')
     .map((segment, idx, arr) => {
       const isLastSegment = idx === arr.length - 1;